)]}' { "log": [ { "commit": "431bf99d26157d56689e5de65bd27ce9f077fc3f", "tree": "b15e357039956fcdd0e0e6177d2fc99bb3cfa822", "parents": [ "72f96e0e38d7e29ba16dcfd824ecaebe38b8293e", "7ae033cc0dfce68d8e0c83aca60837cf2bf0d2e6" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 16:01:57 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 16:01:57 2011 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: (51 commits)\n PM: Improve error code of pm_notifier_call_chain()\n PM: Add \"RTC\" to PM trace time stamps to avoid confusion\n PM / Suspend: Export suspend_set_ops, suspend_valid_only_mem\n PM / Suspend: Add .suspend_again() callback to suspend_ops\n PM / OPP: Introduce function to free cpufreq table\n ARM / shmobile: Return -EBUSY from A4LC power off if A3RV is active\n PM / Domains: Take .power_off() error code into account\n ARM / shmobile: Use genpd_queue_power_off_work()\n ARM / shmobile: Use pm_genpd_poweroff_unused()\n PM / Domains: Introduce function to power off all unused PM domains\n OMAP: PM: disable idle on suspend for GPIO and UART\n OMAP: PM: omap_device: add API to disable idle on suspend\n OMAP: PM: omap_device: add system PM methods for PM domain handling\n OMAP: PM: omap_device: conditionally use PM domain runtime helpers\n PM / Runtime: Add new helper function: pm_runtime_status_suspended()\n PM / Domains: Queue up power off work only if it is not pending\n PM / Domains: Improve handling of wakeup devices during system suspend\n PM / Domains: Do not restore all devices on power off error\n PM / Domains: Allow callbacks to execute all runtime PM helpers\n PM / Domains: Do not execute device callbacks under locks\n ...\n" }, { "commit": "5a791ea4fa4495f7136679cb5366f6544148e613", "tree": "dc27644add7d5f1165db19c28c25ae842e5f96b2", "parents": [ "8209f53d79444747782a28520187abaf689761f2", "9c5a2ba70251ecaab18c7a83e38b3c620223476c" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 15:07:15 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 15:07:15 2011 -0700" }, "message": "Merge branch \u0027for-3.1\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq\n\n* \u0027for-3.1\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:\n workqueue: separate out drain_workqueue() from destroy_workqueue()\n workqueue: remove cancel_rearming_delayed_work[queue]()\n" }, { "commit": "8209f53d79444747782a28520187abaf689761f2", "tree": "726270ea29e037f026d77a99787b9d844531ac42", "parents": [ "22a3b9771117d566def0150ea787fcc95f16e724", "eac1b5e57d7abc836e78fd3fbcf77dbeed01edc9" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 15:06:50 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 15:06:50 2011 -0700" }, "message": "Merge branch \u0027ptrace\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc\n\n* \u0027ptrace\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc: (39 commits)\n ptrace: do_wait(traced_leader_killed_by_mt_exec) can block forever\n ptrace: fix ptrace_signal() \u0026\u0026 STOP_DEQUEUED interaction\n connector: add an event for monitoring process tracers\n ptrace: dont send SIGSTOP on auto-attach if PT_SEIZED\n ptrace: mv send-SIGSTOP from do_fork() to ptrace_init_task()\n ptrace_init_task: initialize child-\u003ejobctl explicitly\n has_stopped_jobs: s/task_is_stopped/SIGNAL_STOP_STOPPED/\n ptrace: make former thread ID available via PTRACE_GETEVENTMSG after PTRACE_EVENT_EXEC stop\n ptrace: wait_consider_task: s/same_thread_group/ptrace_reparented/\n ptrace: kill real_parent_is_ptracer() in in favor of ptrace_reparented()\n ptrace: ptrace_reparented() should check same_thread_group()\n redefine thread_group_leader() as exit_signal \u003e\u003d 0\n do not change dead_task-\u003eexit_signal\n kill task_detached()\n reparent_leader: check EXIT_DEAD instead of task_detached()\n make do_notify_parent() __must_check, update the callers\n __ptrace_detach: avoid task_detached(), check do_notify_parent()\n kill tracehook_notify_death()\n make do_notify_parent() return bool\n ptrace: s/tracehook_tracer_task()/ptrace_parent()/\n ...\n" }, { "commit": "951cc93a7493a81a47e20231441bc6cf17c98a37", "tree": "f53934f0f225e0215a85c8c59af4c6513e89e3f1", "parents": [ "a7e1aabb28e8154ce987b622fd78d80a1ca39361", "415b3334a21aa67806c52d1acf4e72e14f7f402f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 14:43:13 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 14:43:13 2011 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1287 commits)\n icmp: Fix regression in nexthop resolution during replies.\n net: Fix ppc64 BPF JIT dependencies.\n acenic: include NET_SKB_PAD headroom to incoming skbs\n ixgbe: convert to ndo_fix_features\n ixgbe: only enable WoL for magic packet by default\n ixgbe: remove ifdef check for non-existent define\n ixgbe: Pass staterr instead of re-reading status and error bits from descriptor\n ixgbe: Move interrupt related values out of ring and into q_vector\n ixgbe: add structure for containing RX/TX rings to q_vector\n ixgbe: inline the ixgbe_maybe_stop_tx function\n ixgbe: Update ATR to use recorded TX queues instead of CPU for routing\n igb: Fix for DH89xxCC near end loopback test\n e1000: always call e1000_check_for_link() on e1000_ce4100 MACs.\n netxen: add fw version compatibility check\n be2net: request native mode each time the card is reset\n ipv4: Constrain UFO fragment sizes to multiples of 8 bytes\n virtio_net: Fix panic in virtnet_remove\n ipv6: make fragment identifications less predictable\n ipv6: unshare inetpeers\n can: make function can_get_bittiming static\n ...\n" }, { "commit": "033b1142f4bd44a116d1356fe4a0510437ceddf9", "tree": "d2a971a7dc9f3a1af8035e38419c4c4ad8c22632", "parents": [ "f5caadbb3d8fc0b71533e880c684b2230bdb76ac", "e6625fa48e6580a74b7e700efd7e6463e282810b" ], "author": { "name": "David S. Miller", "email": "davem@davemloft.net", "time": "Thu Jul 21 13:38:42 2011 -0700" }, "committer": { "name": "David S. Miller", "email": "davem@davemloft.net", "time": "Thu Jul 21 13:38:42 2011 -0700" }, "message": "Merge branch \u0027master\u0027 of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6\n\nConflicts:\n\tnet/bluetooth/l2cap_core.c\n" }, { "commit": "f5caadbb3d8fc0b71533e880c684b2230bdb76ac", "tree": "7a23a2b44f6e043d9cb6ad4245b78da4bd2e14b0", "parents": [ "0ca87f05ba8bdc6791c14878464efc901ad71e99", "0f598f0b4c3b2259366cfa8adc01bd8e714c82d0" ], "author": { "name": "David S. Miller", "email": "davem@davemloft.net", "time": "Thu Jul 21 12:39:35 2011 -0700" }, "committer": { "name": "David S. Miller", "email": "davem@davemloft.net", "time": "Thu Jul 21 12:39:35 2011 -0700" }, "message": "Merge branch \u0027master\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6\n" }, { "commit": "8a35241803eeb0e9fd3fe27835d6b2775c73b641", "tree": "09f15db936084e239279844bcb6db6608e2bb06f", "parents": [ "f701e5b73a1a79ea62ffd45d9e2bed4c7d5c1fd2" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jul 21 17:06:53 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jul 21 17:06:53 2011 +0200" }, "message": "ptrace: fix ptrace_signal() \u0026\u0026 STOP_DEQUEUED interaction\n\nSimple test-case,\n\n\tint main(void)\n\t{\n\t\tint pid, status;\n\n\t\tpid \u003d fork();\n\t\tif (!pid) {\n\t\t\tpause();\n\t\t\tassert(0);\n\t\t\treturn 0x23;\n\t\t}\n\n\t\tassert(ptrace(PTRACE_ATTACH, pid, 0,0) \u003d\u003d 0);\n\t\tassert(wait(\u0026status) \u003d\u003d pid);\n\t\tassert(WIFSTOPPED(status) \u0026\u0026 WSTOPSIG(status) \u003d\u003d SIGSTOP);\n\n\t\tkill(pid, SIGCONT);\t// \u003c--- also clears STOP_DEQUEUD\n\n\t\tassert(ptrace(PTRACE_CONT, pid, 0,0) \u003d\u003d 0);\n\t\tassert(wait(\u0026status) \u003d\u003d pid);\n\t\tassert(WIFSTOPPED(status) \u0026\u0026 WSTOPSIG(status) \u003d\u003d SIGCONT);\n\n\t\tassert(ptrace(PTRACE_CONT, pid, 0, SIGSTOP) \u003d\u003d 0);\n\t\tassert(wait(\u0026status) \u003d\u003d pid);\n\t\tassert(WIFSTOPPED(status) \u0026\u0026 WSTOPSIG(status) \u003d\u003d SIGSTOP);\n\n\t\tkill(pid, SIGKILL);\n\t\treturn 0;\n\t}\n\nWithout the patch it hangs. After the patch SIGSTOP \"injected\" by the\ntracer is not ignored and stops the tracee.\n\nNote also that if this test-case uses, say, SIGWINCH instead of SIGCONT,\neverything works without the patch. This can\u0027t be right, and this is\nconfusing.\n\nThe problem is that SIGSTOP (or any other sig_kernel_stop() signal) has\nno effect without JOBCTL_STOP_DEQUEUED. This means it is simply ignored\nafter PTRACE_CONT unless JOBCTL_STOP_DEQUEUED was set \"by accident\", say\nit wasn\u0027t cleared after initial SIGSTOP sent by PTRACE_ATTACH.\n\nAt first glance we could change ptrace_signal() to add STOP_DEQUEUED\nafter return from ptrace_stop(), but this is not right in case when the\ntracer does not change the reported SIGSTOP and SIGCONT comes in between.\nThis is even more wrong with PT_SEIZED, SIGCONT adds JOBCTL_TRAP_NOTIFY\nwhich will be \"lost\" during the TRAP_STOP | TRAP_NOTIFY report.\n\nSo lets add STOP_DEQUEUED _before_ we report the signal. It has no effect\nunless sig_kernel_stop() \u003d\u003d T after the tracer resumes us, and in the\nlatter case the pending STOP_DEQUEUED means no SIGCONT in between, we\nshould stop.\n\nNote also that if SIGCONT was sent, PT_SEIZED tracee will correctly\nreport PTRACE_EVENT_STOP/SIGTRAP and thus the tracer can notice the fact\nSIGSTOP was cancelled.\n\nAlso, move the current-\u003eptrace check from ptrace_signal() to its caller,\nget_signal_to_deliver(), this looks more natural.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "cf6ace16a3cd8b728fb0afa68368fd40bbeae19f", "tree": "489c64380668e8c5a29d3f36f37554e4b081a647", "parents": [ "acc11eab70591744369722280c9ce162a6193494", "d1e9ae47a0285d3f1699e8219ce50f656243b93f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 20 15:56:25 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 20 15:56:25 2011 -0700" }, "message": "Merge branch \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n signal: align __lock_task_sighand() irq disabling and RCU\n softirq,rcu: Inform RCU of irq_exit() activity\n sched: Add irq_{enter,exit}() to scheduler_ipi()\n rcu: protect __rcu_read_unlock() against scheduler-using irq handlers\n rcu: Streamline code produced by __rcu_read_unlock()\n rcu: Fix RCU_BOOST race handling current-\u003ercu_read_unlock_special\n rcu: decrease rcu_report_exp_rnp coupling with scheduler\n" }, { "commit": "d1e9ae47a0285d3f1699e8219ce50f656243b93f", "tree": "2f5a68b5ba1677bcd49ee759f09ffc5ccccb1455", "parents": [ "e6625fa48e6580a74b7e700efd7e6463e282810b", "a841796f11c90d53dbac773be56b04fbee8af272" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jul 20 20:59:26 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jul 20 20:59:26 2011 +0200" }, "message": "Merge branch \u0027rcu/urgent\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu into core/urgent\n" }, { "commit": "a841796f11c90d53dbac773be56b04fbee8af272", "tree": "9401a53faddecc7c1644565d0e22630028f82bca", "parents": [ "ec433f0c51527426989ea8a38a856d810d739414" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Tue Jul 19 03:25:36 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Jul 20 11:04:54 2011 -0700" }, "message": "signal: align __lock_task_sighand() irq disabling and RCU\n\nThe __lock_task_sighand() function calls rcu_read_lock() with interrupts\nand preemption enabled, but later calls rcu_read_unlock() with interrupts\ndisabled. It is therefore possible that this RCU read-side critical\nsection will be preempted and later RCU priority boosted, which means that\nrcu_read_unlock() will call rt_mutex_unlock() in order to deboost itself, but\nwith interrupts disabled. This results in lockdep splats, so this commit\nnests the RCU read-side critical section within the interrupt-disabled\nregion of code. This prevents the RCU read-side critical section from\nbeing preempted, and thus prevents the attempt to deboost with interrupts\ndisabled.\n\nIt is quite possible that a better long-term fix is to make rt_mutex_unlock()\ndisable irqs when acquiring the rt_mutex structure\u0027s -\u003ewait_lock.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "ec433f0c51527426989ea8a38a856d810d739414", "tree": "001550d7b18b3f2b5326da3f9dfd893e31c8dc1c", "parents": [ "c5d753a55ac92e09816d410cd17093813f1a904b" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Jul 19 15:32:00 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Jul 20 10:50:12 2011 -0700" }, "message": "softirq,rcu: Inform RCU of irq_exit() activity\n\nThe rcu_read_unlock_special() function relies on in_irq() to exclude\nscheduler activity from interrupt level. This fails because exit_irq()\ncan invoke the scheduler after clearing the preempt_count() bits that\nin_irq() uses to determine that it is at interrupt level. This situation\ncan result in failures as follows:\n\n $task\t\t\tIRQ\t\tSoftIRQ\n\n rcu_read_lock()\n\n /* do stuff */\n\n \u003cpreempt\u003e |\u003d UNLOCK_BLOCKED\n\n rcu_read_unlock()\n --t-\u003ercu_read_lock_nesting\n\n\t\t\tirq_enter();\n\t\t\t/* do stuff, don\u0027t use RCU */\n\t\t\tirq_exit();\n\t\t\t sub_preempt_count(IRQ_EXIT_OFFSET);\n\t\t\t invoke_softirq()\n\n\t\t\t\t\tttwu();\n\t\t\t\t\t spin_lock_irq(\u0026pi-\u003elock)\n\t\t\t\t\t rcu_read_lock();\n\t\t\t\t\t /* do stuff */\n\t\t\t\t\t rcu_read_unlock();\n\t\t\t\t\t rcu_read_unlock_special()\n\t\t\t\t\t rcu_report_exp_rnp()\n\t\t\t\t\t ttwu()\n\t\t\t\t\t spin_lock_irq(\u0026pi-\u003elock) /* deadlock */\n\n rcu_read_unlock_special(t);\n\nEd can simply trigger this \u0027easy\u0027 because invoke_softirq() immediately\ndoes a ttwu() of ksoftirqd/# instead of doing the in-place softirq stuff\nfirst, but even without that the above happens.\n\nCure this by also excluding softirqs from the\nrcu_read_unlock_special() handler and ensuring the force_irqthreads\nksoftirqd/# wakeup is done from full softirq context.\n\n[ Alternatively, delaying the -\u003ercu_read_lock_nesting decrement\n until after the special handling would make the thing more robust\n in the face of interrupts as well. And there is a separate patch\n for that. ]\n\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nReported-and-tested-by: Ed Tomlinson \u003cedt@aei.ca\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "c5d753a55ac92e09816d410cd17093813f1a904b", "tree": "162c63edcc463e18d50fb5b5be479785f02222c4", "parents": [ "10f39bb1b2c1923ca73e70cb13aeee0e9b822d8f" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Jul 19 15:07:25 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Jul 20 10:50:11 2011 -0700" }, "message": "sched: Add irq_{enter,exit}() to scheduler_ipi()\n\nEnsure scheduler_ipi() calls irq_{enter,exit} when it does some actual\nwork. Traditionally we never did any actual work from the resched IPI\nand all magic happened in the return from interrupt path.\n\nNow that we do do some work, we need to ensure irq_{enter,exit} are\ncalled so that we don\u0027t confuse things.\n\nThis affects things like timekeeping, NO_HZ and RCU, basically\neverything with a hook in irq_enter/exit.\n\nExplicit examples of things going wrong are:\n\n sched_clock_cpu() -- has a callback when leaving NO_HZ state to take\n a new reading from GTOD and TSC. Without this\n callback, time is stuck in the past.\n\n RCU -- needs in_irq() to work in order to avoid some nasty deadlocks\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "10f39bb1b2c1923ca73e70cb13aeee0e9b822d8f", "tree": "2e8349c57b1f0563a27be49410f413b643ded1a9", "parents": [ "be0e1e21ef707be4d16ea6a96ac9997463e4b8d2" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Sun Jul 17 21:14:35 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Jul 20 10:50:11 2011 -0700" }, "message": "rcu: protect __rcu_read_unlock() against scheduler-using irq handlers\n\nThe addition of RCU read-side critical sections within runqueue and\npriority-inheritance lock critical sections introduced some deadlock\ncycles, for example, involving interrupts from __rcu_read_unlock()\nwhere the interrupt handlers call wake_up(). This situation can cause\nthe instance of __rcu_read_unlock() invoked from interrupt to do some\nof the processing that would otherwise have been carried out by the\ntask-level instance of __rcu_read_unlock(). When the interrupt-level\ninstance of __rcu_read_unlock() is called with a scheduler lock held\nfrom interrupt-entry/exit situations where in_irq() returns false,\ndeadlock can result.\n\nThis commit resolves these deadlocks by using negative values of\nthe per-task -\u003ercu_read_lock_nesting counter to indicate that an\ninstance of __rcu_read_unlock() is in flight, which in turn prevents\ninstances from interrupt handlers from doing any special processing.\nThis patch is inspired by Steven Rostedt\u0027s earlier patch that similarly\nmade __rcu_read_unlock() guard against interrupt-mediated recursion\n(see https://lkml.org/lkml/2011/7/15/326), but this commit refines\nSteven\u0027s approach to avoid the need for preemption disabling on the\n__rcu_read_unlock() fastpath and to also avoid the need for manipulating\na separate per-CPU variable.\n\nThis patch avoids need for preempt_disable() by instead using negative\nvalues of the per-task -\u003ercu_read_lock_nesting counter. Note that nested\nrcu_read_lock()/rcu_read_unlock() pairs are still permitted, but they will\nnever see -\u003ercu_read_lock_nesting go to zero, and will therefore never\ninvoke rcu_read_unlock_special(), thus preventing them from seeing the\nRCU_READ_UNLOCK_BLOCKED bit should it be set in -\u003ercu_read_unlock_special.\nThis patch also adds a check for -\u003ercu_read_unlock_special being negative\nin rcu_check_callbacks(), thus preventing the RCU_READ_UNLOCK_NEED_QS\nbit from being set should a scheduling-clock interrupt occur while\n__rcu_read_unlock() is exiting from an outermost RCU read-side critical\nsection.\n\nOf course, __rcu_read_unlock() can be preempted during the time that\n-\u003ercu_read_lock_nesting is negative. This could result in the setting\nof the RCU_READ_UNLOCK_BLOCKED bit after __rcu_read_unlock() checks it,\nand would also result it this task being queued on the corresponding\nrcu_node structure\u0027s blkd_tasks list. Therefore, some later RCU read-side\ncritical section would enter rcu_read_unlock_special() to clean up --\nwhich could result in deadlock if that critical section happened to be in\nthe scheduler where the runqueue or priority-inheritance locks were held.\n\nThis situation is dealt with by making rcu_preempt_note_context_switch()\ncheck for negative -\u003ercu_read_lock_nesting, thus refraining from\nqueuing the task (and from setting RCU_READ_UNLOCK_BLOCKED) if we are\nalready exiting from the outermost RCU read-side critical section (in\nother words, we really are no longer actually in that RCU read-side\ncritical section). In addition, rcu_preempt_note_context_switch()\ninvokes rcu_read_unlock_special() to carry out the cleanup in this case,\nwhich clears out the -\u003ercu_read_unlock_special bits and dequeues the task\n(if necessary), in turn avoiding needless delay of the current RCU grace\nperiod and needless RCU priority boosting.\n\nIt is still illegal to call rcu_read_unlock() while holding a scheduler\nlock if the prior RCU read-side critical section has ever had either\npreemption or irqs enabled. However, the common use case is legal,\nnamely where then entire RCU read-side critical section executes with\nirqs disabled, for example, when the scheduler lock is held across the\nentire lifetime of the RCU read-side critical section.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "d110235d2c331c4f79e0879f51104be79e17a469", "tree": "d56bb05a1274f9e7c6a20467d2d04713c185e7ce", "parents": [ "e3589f6c81e4764d32a25d2a2a0afe54fa344f5c" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Jul 20 18:42:57 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jul 20 18:54:33 2011 +0200" }, "message": "sched: Avoid creating superfluous NUMA domains on non-NUMA systems\n\nWhen creating sched_domains, stop when we\u0027ve covered the entire\ntarget span instead of continuing to create domains, only to\nlater find they\u0027re redundant and throw them away again.\n\nThis avoids single node systems from touching funny NUMA\nsched_domain creation code and reduces the risks of the new\nSD_OVERLAP code.\n\nRequested-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Anton Blanchard \u003canton@samba.org\u003e\nCc: mahesh@linux.vnet.ibm.com\nCc: benh@kernel.crashing.org\nCc: linuxppc-dev@lists.ozlabs.org\nLink: http://lkml.kernel.org/r/1311180177.29152.57.camel@twins\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e3589f6c81e4764d32a25d2a2a0afe54fa344f5c", "tree": "414bf6bdbad3f04f629fa2a72254ea85acf723f4", "parents": [ "9c3f75cbd144014bea6af866a154cc2e73ab2287" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jul 15 10:35:52 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jul 20 18:32:41 2011 +0200" }, "message": "sched: Allow for overlapping sched_domain spans\n\nAllow for sched_domain spans that overlap by giving such domains their\nown sched_group list instead of sharing the sched_groups amongst\neach-other.\n\nThis is needed for machines with more than 16 nodes, because\nsched_domain_node_span() will generate a node mask from the\n16 nearest nodes without regard if these masks have any overlap.\n\nCurrently sched_domains have a sched_group that maps to their child\nsched_domain span, and since there is no overlap we share the\nsched_group between the sched_domains of the various CPUs. If however\nthere is overlap, we would need to link the sched_group list in\ndifferent ways for each cpu, and hence sharing isn\u0027t possible.\n\nIn order to solve this, allocate private sched_groups for each CPU\u0027s\nsched_domain but have the sched_groups share a sched_group_power\nstructure such that we can uniquely track the power.\n\nReported-and-tested-by: Anton Blanchard \u003canton@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/n/tip-08bxqw9wis3qti9u5inifh3y@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9c3f75cbd144014bea6af866a154cc2e73ab2287", "tree": "2a565f7ff0820269973415c5605e313cfff903b4", "parents": [ "e6625fa48e6580a74b7e700efd7e6463e282810b" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Jul 14 13:00:06 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jul 20 18:32:40 2011 +0200" }, "message": "sched: Break out cpu_power from the sched_group structure\n\nIn order to prepare for non-unique sched_groups per domain, we need to\ncarry the cpu_power elsewhere, so put a level of indirection in.\n\nReported-and-tested-by: Anton Blanchard \u003canton@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/n/tip-qkho2byuhe4482fuknss40ad@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "be0e1e21ef707be4d16ea6a96ac9997463e4b8d2", "tree": "fe53c0731f5c3a6e56e2358eee9b8f17c3af83f4", "parents": [ "7765be2fec0f476fcd61812d5f9406b04c765020" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sat May 21 05:57:18 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Jul 19 21:38:53 2011 -0700" }, "message": "rcu: Streamline code produced by __rcu_read_unlock()\n\nGiven some common flag combinations, particularly -Os, gcc will inline\nrcu_read_unlock_special() despite its being in an unlikely() clause.\nUse noinline to prohibit this misoptimization.\n\nIn addition, move the second barrier() in __rcu_read_unlock() so that\nit is not on the common-case code path. This will allow the compiler to\ngenerate better code for the common-case path through __rcu_read_unlock().\n\nSuggested-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nAcked-by: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\n" }, { "commit": "7765be2fec0f476fcd61812d5f9406b04c765020", "tree": "e89ccb3fbd5655090b05f608f8e1d39924f23a9a", "parents": [ "131906b0062ddde7f85bbe67754983c754648bd8" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Thu Jul 14 12:24:11 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Jul 19 21:38:52 2011 -0700" }, "message": "rcu: Fix RCU_BOOST race handling current-\u003ercu_read_unlock_special\n\nThe RCU_BOOST commits for TREE_PREEMPT_RCU introduced an other-task\nwrite to a new RCU_READ_UNLOCK_BOOSTED bit in the task_struct structure\u0027s\n-\u003ercu_read_unlock_special field, but, as noted by Steven Rostedt, without\ncorrectly synchronizing all accesses to -\u003ercu_read_unlock_special.\nThis could result in bits in -\u003ercu_read_unlock_special being spuriously\nset and cleared due to conflicting accesses, which in turn could result\nin deadlocks between the rcu_node structure\u0027s -\u003elock and the scheduler\u0027s\nrq and pi locks. These deadlocks would result from RCU incorrectly\nbelieving that the just-ended RCU read-side critical section had been\npreempted and/or boosted. If that RCU read-side critical section was\nexecuted with either rq or pi locks held, RCU\u0027s ensuing (incorrect)\ncalls to the scheduler would cause the scheduler to attempt to once\nagain acquire the rq and pi locks, resulting in deadlock. More complex\ndeadlock cycles are also possible, involving multiple rq and pi locks\nas well as locks from multiple rcu_node structures.\n\nThis commit fixes synchronization by creating -\u003ercu_boosted field in\ntask_struct that is accessed and modified only when holding the -\u003elock\nin the rcu_node structure on which the task is queued (on that rcu_node\nstructure\u0027s -\u003eblkd_tasks list). This results in tasks accessing only\ntheir own current-\u003ercu_read_unlock_special fields, making unsynchronized\naccess once again legal, and keeping the rcu_read_unlock() fastpath free\nof atomic instructions and memory barriers.\n\nThe reason that the rcu_read_unlock() fastpath does not need to access\nthe new current-\u003ercu_boosted field is that this new field cannot\nbe non-zero unless the RCU_READ_UNLOCK_BLOCKED bit is set in the\ncurrent-\u003ercu_read_unlock_special field. Therefore, rcu_read_unlock()\nneed only test current-\u003ercu_read_unlock_special: if that is zero, then\ncurrent-\u003ercu_boosted must also be zero.\n\nThis bug does not affect TINY_PREEMPT_RCU because this implementation\nof RCU accesses current-\u003ercu_read_unlock_special with irqs disabled,\nthus preventing races on the !SMP systems that TINY_PREEMPT_RCU runs on.\n\nMaybe-reported-by: Dave Jones \u003cdavej@redhat.com\u003e\nMaybe-reported-by: Sergey Senozhatsky \u003csergey.senozhatsky@gmail.com\u003e\nReported-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "131906b0062ddde7f85bbe67754983c754648bd8", "tree": "1b92eacb707befb294b4d9985f10aa44715cba16", "parents": [ "b0d304172f49061b4ff78f9e2b02719ac69c8a7e" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Jul 17 02:05:49 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Jul 19 21:38:51 2011 -0700" }, "message": "rcu: decrease rcu_report_exp_rnp coupling with scheduler\n\nPREEMPT_RCU read-side critical sections blocking an expedited grace\nperiod invoke rcu_report_exp_rnp(). When the last such critical section\nhas completed, rcu_report_exp_rnp() invokes the scheduler to wake up the\ntask that invoked synchronize_rcu_expedited() -- needlessly holding the\nroot rcu_node structure\u0027s lock while doing so, thus needlessly providing\na way for RCU and the scheduler to deadlock.\n\nThis commit therefore releases the root rcu_node structure\u0027s lock before\ncalling wake_up().\n\nReported-by: Ed Tomlinson \u003cedt@aei.ca\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "f701e5b73a1a79ea62ffd45d9e2bed4c7d5c1fd2", "tree": "10940ea680a1c8c69cbd9f9aa9aca23a1199aa0e", "parents": [ "d184d6eb1dc3c9869e25a8e422be5c55ab0db4ac" ], "author": { "name": "Vladimir Zapolskiy", "email": "vzapolskiy@gmail.com", "time": "Fri Jul 15 20:45:18 2011 +0300" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jul 18 21:38:33 2011 +0200" }, "message": "connector: add an event for monitoring process tracers\n\nThis change adds a procfs connector event, which is emitted on every\nsuccessful process tracer attach or detach.\n\nIf some process connects to other one, kernelspace connector reports\nprocess id and thread group id of both these involved processes. On\ndisconnection null process id is returned.\n\nSuch an event allows to create a simple automated userspace mechanism\nto be aware about processes connecting to others, therefore predefined\nprocess policies can be applied to them if needed.\n\nNote, a detach signal is emitted only in case, if a tracer process\nexplicitly executes PTRACE_DETACH request. In other cases like tracee\nor tracer exit detach event from proc connector is not reported.\n\nSigned-off-by: Vladimir Zapolskiy \u003cvzapolskiy@gmail.com\u003e\nAcked-by: Evgeniy Polyakov \u003czbr@ioremap.net\u003e\nCc: David S. Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "dcace06cc29df927a74a6bc0e57b9bef87704377", "tree": "9a04518032869b1ed79933026379ea0d7081e43a", "parents": [ "6634ae1033ceaeca5877dd75723210f8c2648c17" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Fri Jul 08 19:13:54 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sun Jul 17 20:23:51 2011 +0200" }, "message": "ptrace: mv send-SIGSTOP from do_fork() to ptrace_init_task()\n\nIf the new child is traced, do_fork() adds the pending SIGSTOP.\nIt assumes that either it is traced because of auto-attach or the\ntracer attached later, in both cases sigaddset/set_thread_flag is\ncorrect even if SIGSTOP is already pending.\n\nNow that we have PTRACE_SEIZE this is no longer right in the latter\ncase. If the tracer does PTRACE_SEIZE after copy_process() makes the\nchild visible the queued SIGSTOP is wrong.\n\nWe could check PT_SEIZED bit and change ptrace_attach() to set both\nPT_PTRACED and PT_SEIZED bits simultaneously but see the next patch,\nwe need to know whether this child was auto-attached or not anyway.\n\nSo this patch simply moves this code to ptrace_init_task(), this\nway we can never race with ptrace_attach().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "961c4675c75112717705fa5c0c53cb9664051479", "tree": "d424199346b5dc1c5d27fe920a66a6ea11989d89", "parents": [ "bb188d7e64deb0e9cf13a99f44ae0065de5352d6" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jul 07 21:33:54 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sun Jul 17 20:23:50 2011 +0200" }, "message": "has_stopped_jobs: s/task_is_stopped/SIGNAL_STOP_STOPPED/\n\nhas_stopped_jobs() naively checks task_is_stopped(group_leader). This\nwas always wrong even without ptrace, group_leader can be dead. And\ngiven that ptrace can change the state to TRACED this is wrong even\nin the single-threaded case.\n\nChange the code to check SIGNAL_STOP_STOPPED and simplify the code,\nretval + break/continue doesn\u0027t make this trivial code more readable.\n\nWe could probably add the usual \"|| signal-\u003egroup_stop_count\" check\nbut I don\u0027t think this makes sense, the task can start the group-stop\nright after the check anyway.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "ba1389d74f34c0c6e95cc135a332cd29c29d9c20", "tree": "53813843d22cfcfe6d466a5daa44c646f8157980", "parents": [ "f0c077a8b7f9dce590c760a7b2f3c417dffa52d1", "5ca80817e231723f1399bff495854ba2171103ca" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Jul 15 23:59:09 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Jul 15 23:59:09 2011 +0200" }, "message": "Merge branch \u0027pm-domains\u0027 into for-linus\n\n* pm-domains: (33 commits)\n ARM / shmobile: Return -EBUSY from A4LC power off if A3RV is active\n PM / Domains: Take .power_off() error code into account\n ARM / shmobile: Use genpd_queue_power_off_work()\n ARM / shmobile: Use pm_genpd_poweroff_unused()\n PM / Domains: Introduce function to power off all unused PM domains\n PM / Domains: Queue up power off work only if it is not pending\n PM / Domains: Improve handling of wakeup devices during system suspend\n PM / Domains: Do not restore all devices on power off error\n PM / Domains: Allow callbacks to execute all runtime PM helpers\n PM / Domains: Do not execute device callbacks under locks\n PM / Domains: Make failing pm_genpd_prepare() clean up properly\n PM / Domains: Set device state to \"active\" during system resume\n ARM: mach-shmobile: sh7372 A3RV requires A4LC\n PM / Domains: Export pm_genpd_poweron() in header\n ARM: mach-shmobile: sh7372 late pm domain off\n ARM: mach-shmobile: Runtime PM late init callback\n ARM: mach-shmobile: sh7372 D4 support\n ARM: mach-shmobile: sh7372 A4MP support\n ARM: mach-shmobile: sh7372: make sure that fsi is peripheral of spu2\n ARM: mach-shmobile: sh7372 A3SG support\n ...\n" }, { "commit": "f0c077a8b7f9dce590c760a7b2f3c417dffa52d1", "tree": "ef6d08aa3ca1d79000db7d7479d98bda04a11c78", "parents": [ "1d8047a6f7973470bb1de4606a6e00c0bbee3cc6" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Fri Jul 08 20:53:36 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Jul 15 23:58:20 2011 +0200" }, "message": "PM: Improve error code of pm_notifier_call_chain()\n\nThis enables pm_notifier_call_chain() to get the actual error code\nin the callback rather than always assume -EINVAL by converting all\nPM notifier calls to return encapsulate error code with\nnotifier_from_errno().\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\n" }, { "commit": "a5e4fd8783a2bec861ecf1138cdc042269ff59aa", "tree": "0662c2283c8d8601aa152f70a0d0abbe128fec9b", "parents": [ "3b5fe85252326217cd96f24a7bda4460d8f71bee" ], "author": { "name": "Kevin Hilman", "email": "khilman@ti.com", "time": "Mon Jun 27 01:01:07 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Jul 15 23:58:19 2011 +0200" }, "message": "PM / Suspend: Export suspend_set_ops, suspend_valid_only_mem\n\nSome platforms wish to implement their PM core suspend code as\nmodules. To do so, these functions need to be exported to modules.\n\n[rjw: Replaced EXPORT_SYMBOL with EXPORT_SYMBOL_GPL]\n\nReported-by: Jean Pihet \u003cj-pihet@ti.com\u003e\nSigned-off-by: Kevin Hilman \u003ckhilman@ti.com\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\n" }, { "commit": "3b5fe85252326217cd96f24a7bda4460d8f71bee", "tree": "cfcf577a53b88109d36f73577a8177279444a09f", "parents": [ "99f381d3549432a250fe846a2a82d61a032804b0" ], "author": { "name": "MyungJoo Ham", "email": "myungjoo.ham@samsung.com", "time": "Sun Jun 12 15:57:05 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Jul 15 23:58:19 2011 +0200" }, "message": "PM / Suspend: Add .suspend_again() callback to suspend_ops\n\nA system or a device may need to control suspend/wakeup events. It may\nwant to wakeup the system after a predefined amount of time or at a\npredefined event decided while entering suspend for polling or delayed\nwork. Then, it may want to enter suspend again if its predefined wakeup\ncondition is the only wakeup reason and there is no outstanding events;\nthus, it does not wakeup the userspace unnecessary or unnecessary\ndevices and keeps suspended as long as possible (saving the power).\n\nEnabling a system to wakeup after a specified time can be easily\nachieved by using RTC. However, to enter suspend again immediately\nwithout invoking userland and unrelated devices, we need additional\nfeatures in the suspend framework.\n\nSuch need comes from:\n\n 1. Monitoring a critical device status without interrupts that can\nwakeup the system. (in-suspend polling)\n An example is ambient temperature monitoring that needs to shut down\nthe system or a specific device function if it is too hot or cold. The\ntemperature of a specific device may be needed to be monitored as well;\ne.g., a charger monitors battery temperature in order to stop charging\nif overheated.\n\n 2. Execute critical \"delayed work\" at suspend.\n A driver or a system/board may have a delayed work (or any similar\nthings) that it wants to execute at the requested time.\n For example, some chargers want to check the battery voltage some\ntime (e.g., 30 seconds) after the battery is fully charged and the\ncharger has stopped. Then, the charger restarts charging if the voltage\nhas dropped more than a threshold, which is smaller than \"restart-charger\"\nvoltage, which is a threshold to restart charging regardless of the\ntime passed.\n\nThis patch allows to add \"suspend_again\" callback at struct\nplatform_suspend_ops and let the \"suspend_again\" callback return true if\nthe system is required to enter suspend again after the current instance\nof wakeup. Device-wise suspend_again implemented at dev_pm_ops or\nsyscore is not done because: a) suspend_again feature is usually under\nplatform-wise decision and controls the behavior of the whole platform\nand b) There are very limited devices related to the usage cases of\nsuspend_again; chargers and temperature sensors are mentioned so far.\n\nWith suspend_again callback registered at struct platform_suspend_ops\nsuspend_ops in kernel/power/suspend.c with suspend_set_ops by the\nplatform, the suspend framework tries to enter suspend again by\nlooping suspend_enter() if suspend_again has returned true and there has\nbeen no errors in the suspending sequence or pending wakeups (by\npm_wakeup_pending).\n\nTested at Exynos4-NURI.\n\n[rjw: Fixed up kerneldoc comment for suspend_enter().]\n\nSigned-off-by: MyungJoo Ham \u003cmyungjoo.ham@samsung.com\u003e\nSigned-off-by: Kyungmin Park \u003ckyungmin.park@samsung.com\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\n" }, { "commit": "df8d6fe9efba4ea4b46a5bdc229031c5bb880575", "tree": "d5fb84d4bec0dc62b1ec1a19a01718620caa9918", "parents": [ "c64be78ffb415278d7d32d6f55de95c73dcc19a4", "b0d304172f49061b4ff78f9e2b02719ac69c8a7e" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 15 09:54:34 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 15 09:54:34 2011 -0700" }, "message": "Merge branch \u0027rcu/urgent\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu\n\n* \u0027rcu/urgent\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu:\n rcu: Prevent RCU callbacks from executing before scheduler initialized\n" }, { "commit": "c64be78ffb415278d7d32d6f55de95c73dcc19a4", "tree": "0777bdbb0424a6ce948c817247757a4ba3b01a32", "parents": [ "5dcd07b9f39ca3e9be5bcc387d193fc0674e1c81" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Jul 11 16:28:50 2011 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 15 09:54:02 2011 -0700" }, "message": "sched: Fix 32bit race\n\nCommit 3fe1698b7fe0 (\"sched: Deal with non-atomic min_vruntime reads\non 32bit\") forgot to initialize min_vruntime_copy which could lead to\nan infinite while loop in task_waking_fair() under some circumstances\n(early boot, lucky timing).\n\n[ This bug was also reported by others that blamed it on the RCU\n initialization problems ]\n\nReported-and-tested-by: Bruno Wolff III \u003cbruno@wolff.to\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nReviewed-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b0d304172f49061b4ff78f9e2b02719ac69c8a7e", "tree": "882123e565ced895910490514f6e676c708b5001", "parents": [ "620917de59eeb934b9f8cf35cc2d95c1ac8ed0fc" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Sun Jul 10 15:57:35 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Jul 13 08:17:56 2011 -0700" }, "message": "rcu: Prevent RCU callbacks from executing before scheduler initialized\n\nUnder some rare but real combinations of configuration parameters, RCU\ncallbacks are posted during early boot that use kernel facilities that\nare not yet initialized. Therefore, when these callbacks are invoked,\nhard hangs and crashes ensue. This commit therefore prevents RCU\ncallbacks from being invoked until after the scheduler is fully up and\nrunning, as in after multiple tasks have been spawned.\n\nIt might well turn out that a better approach is to identify the specific\nRCU callbacks that are causing this problem, but that discussion will\nwait until such time as someone really needs an RCU callback to be invoked\n(as opposed to merely registered) during early boot.\n\nReported-by: julie Sullivan \u003ckernelmail.jms@gmail.com\u003e\nReported-by: RKK \u003ckulkarni.ravi4@gmail.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nTested-by: Konrad Rzeszutek Wilk \u003ckonrad.wilk@oracle.com\u003e\nTested-by: julie Sullivan \u003ckernelmail.jms@gmail.com\u003e\nTested-by: RKK \u003ckulkarni.ravi4@gmail.com\u003e\n" }, { "commit": "d93a881dd7d71ad0e6504af232be2795044ab686", "tree": "71fc6918e676a0cf53d585f5a253646a49b60c83", "parents": [ "d1ca1a004822983e2fc702d5382b4b9a5527cfbe", "24109afd17426e1a2b72141e4a2b730057e1a0ea" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 12 14:19:51 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 12 14:19:51 2011 -0700" }, "message": "Merge branch \u0027fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc\n\n* \u0027fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc:\n pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting\n ARM: pxa/raumfeld: fix device name for codec ak4104\n ARM: pxa/raumfeld: display initialisation fixes\n ARM: pxa/raumfeld: adapt to upcoming hardware change\n ARM: pxa: fix gpio_to_chip() clash with gpiolib namespace\n genirq: replace irq_gc_ack() with {set,clr}_bit variants (fwd)\n arm: mach-vt8500: add forgotten irq_data conversion\n ARM: pxa168: correct nand pmu setting\n ARM: pxa910: correct nand pmu setting\n ARM: pxa: fix PGSR register address calculation\n" }, { "commit": "31cb852809c86541c817538c98003678546dfa58", "tree": "324808c5a9def43a7f15c0fda97f58ee01f03c42", "parents": [ "2a9d6df425d7b46b23cbc8673b2dfefa4678abdb", "4d4cf23cdde2f8f9324f5684a7f349e182039529" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 07 13:22:41 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 07 13:22:41 2011 -0700" }, "message": "Merge branch \u0027pm-fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6\n\n* \u0027pm-fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:\n PM / Hibernate: Fix free_unnecessary_pages()\n" }, { "commit": "27a3b735b70651f28db03e5f92775a40661ba7a6", "tree": "9f300b93aa34381aa1d3121e9d53e8c8e1623a24", "parents": [ "85746e429f8e5dc8c5c0beadc0f099cb1feab93e", "161b6ae0e067e421b20bb35caf66bdb405c929ac", "140fe3b1ab9c082182ef13359fab4ddba95c24c3", "e4c2fb0d5776b58049d2556b456144a4db3fe5a9" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 07 13:17:45 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 07 13:17:45 2011 -0700" }, "message": "Merge branches \u0027core-urgent-for-linus\u0027, \u0027perf-urgent-for-linus\u0027 and \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n debugobjects: Fix boot crash when kmemleak and debugobjects enabled\n\n* \u0027perf-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n jump_label: Fix jump_label update for modules\n oprofile, x86: Fix race in nmi handler while starting counters\n\n* \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n sched: Disable (revert) SCHED_LOAD_SCALE increase\n sched, cgroups: Fix MIN_SHARES on 64-bit boxen\n" }, { "commit": "659fb32d1b67476f4ade25e9ea0e2642a5b9c4b5", "tree": "a875904f1c457f321563060491956266a57c6514", "parents": [ "d30e1521b2afb5e6f21ca8bc1a4b6ec2afc93597" ], "author": { "name": "Simon Guinot", "email": "sguinot@lacie.com", "time": "Wed Jul 06 12:41:31 2011 -0400" }, "committer": { "name": "Arnd Bergmann", "email": "arnd@arndb.de", "time": "Thu Jul 07 16:02:26 2011 +0000" }, "message": "genirq: replace irq_gc_ack() with {set,clr}_bit variants (fwd)\n\nThis fixes a regression introduced by e59347a \"arm: orion:\nUse generic irq chip\".\n\nDepending on the device, interrupts acknowledgement is done by setting\nor by clearing a dedicated register. Replace irq_gc_ack() with some\n{set,clr}_bit variants allows to handle both cases.\n\nNote that this patch affects the following SoCs: Davinci, Samsung and\nOrion. Except for this last, the change is minor: irq_gc_ack() is just\nrenamed into irq_gc_ack_set_bit().\n\nFor the Orion SoCs, the edge GPIO interrupts support is currently\nbroken. irq_gc_ack() try to acknowledge a such interrupt by setting\nthe corresponding cause register bit. The Orion GPIO device expect the\nopposite. To fix this issue, the irq_gc_ack_clr_bit() variant is used.\n\nTested on Network Space v2.\n\nReported-by: Joey Oravec \u003cjoravec@drewtech.com\u003e\nSigned-off-by: Simon Guinot \u003csguinot@lacie.com\u003e\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\n" }, { "commit": "4d4cf23cdde2f8f9324f5684a7f349e182039529", "tree": "f84a26d15f1112cc7c452d1fdac3bd70857774e0", "parents": [ "a2fa83faf47b514ab947cea916d3691b66525073" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Jul 06 20:15:23 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Jul 06 20:15:23 2011 +0200" }, "message": "PM / Hibernate: Fix free_unnecessary_pages()\n\nThere is a bug in free_unnecessary_pages() that causes it to\nattempt to free too many pages in some cases, which triggers the\nBUG_ON() in memory_bm_clear_bit() for copy_bm. Namely, if\ncount_data_pages() is initially greater than alloc_normal, we get\nto_free_normal equal to 0 and \"save\" greater from 0. In that case,\nif the sum of \"save\" and count_highmem_pages() is greater than\nalloc_highmem, we subtract a positive number from to_free_normal.\nHence, since to_free_normal was 0 before the subtraction and is\nan unsigned int, the result is converted to a huge positive number\nthat is used as the number of pages to free.\n\nFix this bug by checking if to_free_normal is actually greater\nthan or equal to the number we\u0027re going to subtract from it.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nReported-and-tested-by: Matthew Garrett \u003cmjg@redhat.com\u003e\nCc: stable@kernel.org\n" }, { "commit": "23c570a67448e803408191f529ed9a83fd34a25a", "tree": "8705e1ad863d745c42d8eb95a8c3f53f26fd0e38", "parents": [ "a51cb91d81f8e6fc4e5e08b772cc3ceb13ac9d37" ], "author": { "name": "Ram Pai", "email": "linuxram@us.ibm.com", "time": "Tue Jul 05 23:44:30 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 06 10:54:08 2011 -0700" }, "message": "resource: ability to resize an allocated resource\n\nProvides the ability to resize a resource that is already allocated.\nThis functionality is put in place to support reallocation needs of\npci resources.\n\nSigned-off-by: Ram Pai \u003clinuxram@us.ibm.com\u003e\nAcked-by: Jesse Barnes \u003cjbarnes@virtuousgeek.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b7b95920aa2e89e655afe9913ee0e55855ceda90", "tree": "6f7f30252e2b4b518d76906706a745107288a701", "parents": [ "d4f2d87a8b46c14c4307c690c92bd08229f66ecf" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Jul 01 22:13:37 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Sat Jul 02 14:29:56 2011 +0200" }, "message": "PM: Allow the clocks management code to be used during system suspend\n\nThe common clocks management code in drivers/base/power/clock_ops.c\nis going to be used during system-wide power transitions as well as\nfor runtime PM, so it shouldn\u0027t depend on CONFIG_PM_RUNTIME.\nHowever, the suspend/resume functions provided by it for\nCONFIG_PM_RUNTIME unset, to be used during system-wide power\ntransitions, should not behave in the same way as their counterparts\ndefined for CONFIG_PM_RUNTIME set, because in that case the clocks\nare managed differently at run time.\n\nThe names of the functions still contain the word \"runtime\" after\nthis change, but that is going to be modified by a separate patch\nlater.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nReviewed-by: Kevin Hilman \u003ckhilman@ti.com\u003e\n" }, { "commit": "f721889ff65afa6243c463832c74dee3bed418d5", "tree": "350bcb4fd7964167189fce93d0a9352f2958b1a4", "parents": [ "dc6e4e56e6ef473a696a1ab24f80b79b9aceb92d" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Jul 01 22:12:45 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Sat Jul 02 14:29:55 2011 +0200" }, "message": "PM / Domains: Support for generic I/O PM domains (v8)\n\nIntroduce common headers, helper functions and callbacks allowing\nplatforms to use simple generic power domains for runtime power\nmanagement.\n\nIntroduce struct generic_pm_domain to be used for representing\npower domains that each contain a number of devices and may be\nparent domains or subdomains with respect to other power domains.\nAmong other things, this structure includes callbacks to be\nprovided by platforms for performing specific tasks related to\npower management (i.e. -\u003estop_device() may disable a device\u0027s\nclocks, while -\u003estart_device() may enable them, -\u003epower_off() is\nsupposed to remove power from the entire power domain\nand -\u003epower_on() is supposed to restore it).\n\nIntroduce functions that can be used as power domain runtime PM\ncallbacks, pm_genpd_runtime_suspend() and pm_genpd_runtime_resume(),\nas well as helper functions for the initialization of a power\ndomain represented by a struct generic_power_domain object,\nadding a device to or removing a device from it and adding or\nremoving subdomains.\n\nIntroduce configuration option CONFIG_PM_GENERIC_DOMAINS to be\nselected by the platforms that want to use the new code.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\nReviewed-by: Kevin Hilman \u003ckhilman@ti.com\u003e\n" }, { "commit": "cd62287e364c0d15d517c6ced4e4808b54711475", "tree": "12544d4a0b84f378691be2a1d3d48a46f42595fc", "parents": [ "daf54f1f363a61c618662ef66d4bf09d2b090941" ], "author": { "name": "Mike Galbraith", "email": "mgalbraith@suse.de", "time": "Sat Jun 04 15:03:20 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jul 01 10:25:03 2011 +0200" }, "message": "sched, cgroups: Fix MIN_SHARES on 64-bit boxen\n\nCommit c8b28116 (\"sched: Increase SCHED_LOAD_SCALE resolution\")\nintended to have no user-visible effect, but allows setting\ncpu.shares to \u003c MIN_SHARES, which the user then sees.\n\nSigned-off-by: Mike Galbraith \u003cefault@gmx.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nikhil Rao \u003cncrao@google.com\u003e\nLink: http://lkml.kernel.org/r/1307192600.8618.3.camel@marge.simson.net\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "131ad62d8fc06d9d0a5c61d9526876352c2f2bbd", "tree": "517d1172c9510bc3645d0dbc98938676696abe7c", "parents": [ "15b4d93f0316caec44e07255c1d73bde4fac12e4" ], "author": { "name": "Mr Dash Four", "email": "mr.dash.four@googlemail.com", "time": "Thu Jun 30 13:31:57 2011 +0200" }, "committer": { "name": "Patrick McHardy", "email": "kaber@trash.net", "time": "Thu Jun 30 13:31:57 2011 +0200" }, "message": "netfilter: add SELinux context support to AUDIT target\n\nIn this revision the conversion of secid to SELinux context and adding it\nto the audit log is moved from xt_AUDIT.c to audit.c with the aid of a\nseparate helper function - audit_log_secctx - which does both the conversion\nand logging of SELinux context, thus also preventing internal secid number\nbeing leaked to userspace. If conversion is not successful an error is raised.\n\nWith the introduction of this helper function the work done in xt_AUDIT.c is\nmuch more simplified. It also opens the possibility of this helper function\nbeing used by other modules (including auditd itself), if desired. With this\naddition, typical (raw auditd) output after applying the patch would be:\n\ntype\u003dNETFILTER_PKT msg\u003daudit(1305852240.082:31012): action\u003d0 hook\u003d1 len\u003d52 inif\u003d? outif\u003deth0 saddr\u003d10.1.1.7 daddr\u003d10.1.2.1 ipid\u003d16312 proto\u003d6 sport\u003d56150 dport\u003d22 obj\u003dsystem_u:object_r:ssh_client_packet_t:s0\ntype\u003dNETFILTER_PKT msg\u003daudit(1306772064.079:56): action\u003d0 hook\u003d3 len\u003d48 inif\u003deth0 outif\u003d? smac\u003d00:05:5d:7c:27:0b dmac\u003d00:02:b3:0a:7f:81 macproto\u003d0x0800 saddr\u003d10.1.2.1 daddr\u003d10.1.1.7 ipid\u003d462 proto\u003d6 sport\u003d22 dport\u003d3561 obj\u003dsystem_u:object_r:ssh_server_packet_t:s0\n\nAcked-by: Eric Paris \u003ceparis@redhat.com\u003e\nSigned-off-by: Mr Dash Four \u003cmr.dash.four@googlemail.com\u003e\nSigned-off-by: Patrick McHardy \u003ckaber@trash.net\u003e\n" }, { "commit": "140fe3b1ab9c082182ef13359fab4ddba95c24c3", "tree": "e59debeb1aea1650fd490b0264f66b4f70a26aca", "parents": [ "debf1d4948bccf58fa172acb1a7306792d77705d" ], "author": { "name": "Xiao Guangrong", "email": "xiaoguangrong@cn.fujitsu.com", "time": "Tue Jun 21 10:35:55 2011 +0800" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed Jun 29 09:59:17 2011 -0400" }, "message": "jump_label: Fix jump_label update for modules\n\nThe jump labels entries for modules do not stop at __stop__jump_table,\nbut after mod-\u003ejump_entries + mod_num_jump_entries.\n\nBy checking the wrong end point, module trace events never get enabled.\n\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nAcked-by: Jason Baron \u003cjbaron@redhat.com\u003e\nTested-by: Avi Kivity \u003cavi@redhat.com\u003e\nTested-by: Johannes Berg \u003cjohannes@sipsolutions.net\u003e\nSigned-off-by: Xiao Guangrong \u003cxiaoguangrong@cn.fujitsu.com\u003e\nLink: http://lkml.kernel.org/r/4E00038B.2060404@cn.fujitsu.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "26c4caea9d697043cc5a458b96411b86d7f6babd", "tree": "cf4de2553fbfcafc41eb4f84bc9ee1eb69adf725", "parents": [ "08142579b6ca35883c1ed066a2681de6f6917062" ], "author": { "name": "Vasiliy Kulikov", "email": "segoon@openwall.com", "time": "Mon Jun 27 16:18:11 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jun 27 18:00:13 2011 -0700" }, "message": "taskstats: don\u0027t allow duplicate entries in listener mode\n\nCurrently a single process may register exit handlers unlimited times.\nIt may lead to a bloated listeners chain and very slow process\nterminations.\n\nEg after 10KK sent TASKSTATS_CMD_ATTR_REGISTER_CPUMASKs ~300 Mb of\nkernel memory is stolen for the handlers chain and \"time id\" shows 2-7\nseconds instead of normal 0.003. It makes it possible to exhaust all\nkernel memory and to eat much of CPU time by triggerring numerous exits\non a single CPU.\n\nThe patch limits the number of times a single process may register\nitself on a single CPU to one.\n\nOne little issue is kept unfixed - as taskstats_exit() is called before\nexit_files() in do_exit(), the orphaned listener entry (if it was not\nexplicitly deregistered) is kept until the next someone\u0027s exit() and\nimplicit deregistration in send_cpu_listeners(). So, if a process\nregistered itself as a listener exits and the next spawned process gets\nthe same pid, it would inherit taskstats attributes.\n\nSigned-off-by: Vasiliy Kulikov \u003csegooon@gmail.com\u003e\nCc: Balbir Singh \u003cbsingharora@gmail.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "479bf98c1c29b40d86e40a4e6e4944c2f03d9493", "tree": "259bda55b4e49d764e8768e5149f755c8897ab5c", "parents": [ "bb3696da89743d580f869142d0a6e6ba9b7fe89a" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Fri Jun 24 17:34:39 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:11 2011 +0200" }, "message": "ptrace: wait_consider_task: s/same_thread_group/ptrace_reparented/\n\nwait_consider_task() checks same_thread_group(parent, real_parent),\nthis is the open-coded ptrace_reparented().\n\n__ptrace_detach() remains the only function which has to check this by\nhand, although we could reorganize the code to delay __ptrace_unlink.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "bb3696da89743d580f869142d0a6e6ba9b7fe89a", "tree": "fb961c4164198742024ed8924a8824699a3065f1", "parents": [ "0347e17739095c58c0194fed6a61aced3536d258" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Fri Jun 24 17:34:23 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:10 2011 +0200" }, "message": "ptrace: kill real_parent_is_ptracer() in in favor of ptrace_reparented()\n\nKill real_parent_is_ptracer() and update the callers to use\nptrace_reparented(), after the previous patch they do the same.\n\nRemove the unnecessary -\u003eptrace !\u003d 0 check in get_signal_to_deliver(),\nif ptrace_reparented() \u003d\u003d T then the task must be ptraced.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "d4f7c511c1c2a67eb287987cf1ce9554149030e6", "tree": "0756b300e8f558a923782a9ccea9a8b532e39159", "parents": [ "e550f14dc6322e794d4e70825f63c9c99177ae8b" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 23:10:11 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:10 2011 +0200" }, "message": "do not change dead_task-\u003eexit_signal\n\n__ptrace_detach() and do_notify_parent() set task-\u003eexit_signal \u003d -1\nto mark the task dead. This is no longer needed, nobody checks\nexit_signal to detect the EXIT_DEAD task.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "e550f14dc6322e794d4e70825f63c9c99177ae8b", "tree": "64f918a0d70f82842211a3c0d54ca658877b5b5d", "parents": [ "0976a03e5ce8ec346e985f21046d7a75bb7fdffd" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 23:09:54 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:09 2011 +0200" }, "message": "kill task_detached()\n\nUpadate the last user of task_detached(), wait_task_zombie(), to\nuse thread_group_leader() and kill task_detached().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "0976a03e5ce8ec346e985f21046d7a75bb7fdffd", "tree": "347ab2fa51689226d734b288f330b5ad16997d8e", "parents": [ "8677347378044ab564470bced2275520efb3670d" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 23:09:39 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:09 2011 +0200" }, "message": "reparent_leader: check EXIT_DEAD instead of task_detached()\n\nChange reparent_leader() to check -\u003eexit_state instead of -\u003eexit_signal,\nthis matches the similar EXIT_DEAD check in wait_consider_task() and\nallows us to cleanup the do_notify_parent/task_detached logic.\n\ntask_detached() was really needed during reparenting before 9cd80bbb\n\"do_wait() optimization: do not place sub-threads on -\u003echildren list\"\nto filter out the sub-threads. After this change task_detached(p) can\nonly be true if p is the dead group_leader and its parent ignores\nSIGCHLD, in this case the caller of do_notify_parent() is going to\nreap this task and it should set EXIT_DEAD.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "8677347378044ab564470bced2275520efb3670d", "tree": "61baa72f24bb12eadd6956fb0abeb7eabda46b88", "parents": [ "9843a1e977977986d0a4c1000f2229b032572534" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 23:09:09 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:09 2011 +0200" }, "message": "make do_notify_parent() __must_check, update the callers\n\nChange other callers of do_notify_parent() to check the value it\nreturns, this makes the subsequent task_detached() unnecessary.\nMark do_notify_parent() as __must_check.\n\nUse thread_group_leader() instead of !task_detached() to check\nif we need to notify the real parent in wait_task_zombie().\n\nRemove the stale comment in release_task(). \"just for sanity\" is\nno longer true, we have to set EXIT_DEAD to avoid the races with\ndo_wait().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "9843a1e977977986d0a4c1000f2229b032572534", "tree": "8c3d8a77ed8b2a021451a493aa47162977c8001b", "parents": [ "45cdf5cc0703c537194588c63d53bad1f2539d36" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 23:08:53 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:08 2011 +0200" }, "message": "__ptrace_detach: avoid task_detached(), check do_notify_parent()\n\n__ptrace_detach() relies on the current obscure behaviour of\ndo_notify_parent(tsk) which changes tsk-\u003eexit_signal if this child\nshould be silently reaped. That is why we check task_detached(), it\nis true if the task is sub-thread, or it is the group_leader but\nits exit_signal was changed by do_notify_parent().\n\nThis is confusing, change the code to rely on !thread_group_leader()\nor the value returned by do_notify_parent().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "45cdf5cc0703c537194588c63d53bad1f2539d36", "tree": "579573d2cbe054d767a9f6b575b88836586fb7ce", "parents": [ "53c8f9f199b239668e6b1a907735ee323a0d1ccd" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jun 23 19:06:50 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:08 2011 +0200" }, "message": "kill tracehook_notify_death()\n\nKill tracehook_notify_death(), reimplement the logic in its caller,\nexit_notify().\n\nAlso, change the exec_id\u0027s check to use thread_group_leader() instead\nof task_detached(), this is more clear. This logic only applies to\nthe exiting leader, a sub-thread must never change its exit_signal.\n\nNote: when the traced group leader exits the exit_signal-or-SIGCHLD\nlogic looks really strange:\n\n\t- we notify the tracer even if !thread_group_empty() but\n\t do_wait(WEXITED) can\u0027t work until all threads exit\n\n\t- if the tracer is real_parent, it is not clear why can\u0027t\n\t we use -\u003eexit_signal event if !thread_group_empty()\n\n-v2: do not try to fix the 2nd oddity to avoid the subtle behavior\n change mixed with reorganization, suggested by Tejun.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "53c8f9f199b239668e6b1a907735ee323a0d1ccd", "tree": "785afb9c72a2df27cd6802cf311df18711c59b76", "parents": [ "06d984737bac0545fe20bb5447ee488b95adb531" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 23:08:18 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jun 27 20:30:08 2011 +0200" }, "message": "make do_notify_parent() return bool\n\n- change do_notify_parent() to return a boolean, true if the task should\n be reaped because its parent ignores SIGCHLD.\n\n- update the only caller which checks the returned value, exit_notify().\n\nThis temporary uglifies exit_notify() even more, will be cleanuped by\nthe next change.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "8abf55883431a91d4877933240c8419b7fc17274", "tree": "c7de035cf068f3edf5053a30d912c2024bac88d8", "parents": [ "4d362ad280fca0f2e098de607534f72f2c243e12", "b1eb085c064d0843826d7402db7fc5f3032e01fc" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jun 25 07:23:59 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jun 25 07:23:59 2011 -0700" }, "message": "Merge branch \u0027timer-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027timer-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n rtc: vt8500: Fix build error \u0026 cleanup rtc_class_ops-\u003eupdate_irq_enable()\n alarmtimers: Return -ENOTSUPP if no RTC device is present\n alarmtimers: Handle late rtc module loading\n" }, { "commit": "4b9d33e6d83cc05a8005a8f9a8b9677fa0f53626", "tree": "250b740d22f9604326ecfd769dd2f74d60187a19", "parents": [ "a288eecce5253cc1565d400a52b9b476a157e040" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Fri Jun 17 16:50:38 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 19:26:29 2011 +0200" }, "message": "ptrace: kill clone/exec tracehooks\n\nAt this point, tracehooks aren\u0027t useful to mainline kernel and mostly\njust add an extra layer of obfuscation. Although they have comments,\nwithout actual in-kernel users, it is difficult to tell what are their\nassumptions and they\u0027re actually trying to achieve. To mainline\nkernel, they just aren\u0027t worth keeping around.\n\nThis patch kills the following clone and exec related tracehooks.\n\n\ttracehook_prepare_clone()\n\ttracehook_finish_clone()\n\ttracehook_report_clone()\n\ttracehook_report_clone_complete()\n\ttracehook_unsafe_exec()\n\nThe changes are mostly trivial - logic is moved to the caller and\ncomments are merged and adjusted appropriately.\n\nThe only exception is in check_unsafe_exec() where LSM_UNSAFE_PTRACE*\nare OR\u0027d to bprm-\u003eunsafe instead of setting it, which produces the\nsame result as the field is always zero on entry. It also tests\np-\u003eptrace instead of (p-\u003eptrace \u0026 PT_PTRACED) for consistency, which\nalso gives the same result.\n\nThis doesn\u0027t introduce any behavior change.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "a288eecce5253cc1565d400a52b9b476a157e040", "tree": "a933dd8c9791be83b7a67a33502c79e7b441960e", "parents": [ "f3c04b934d429b1ace21866f011b66de328c0dc9" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Fri Jun 17 16:50:37 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 19:26:28 2011 +0200" }, "message": "ptrace: kill trivial tracehooks\n\nAt this point, tracehooks aren\u0027t useful to mainline kernel and mostly\njust add an extra layer of obfuscation. Although they have comments,\nwithout actual in-kernel users, it is difficult to tell what are their\nassumptions and they\u0027re actually trying to achieve. To mainline\nkernel, they just aren\u0027t worth keeping around.\n\nThis patch kills the following trivial tracehooks.\n\n* Ones testing whether task is ptraced. Replace with -\u003eptrace test.\n\n\ttracehook_expect_breakpoints()\n\ttracehook_consider_ignored_signal()\n\ttracehook_consider_fatal_signal()\n\n* ptrace_event() wrappers. Call directly.\n\n\ttracehook_report_exec()\n\ttracehook_report_exit()\n\ttracehook_report_vfork_done()\n\n* ptrace_release_task() wrapper. Call directly.\n\n\ttracehook_finish_release_task()\n\n* noop\n\n\ttracehook_prepare_release_task()\n\ttracehook_report_death()\n\nThis doesn\u0027t introduce any behavior change.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "d21142ece414ce1088cfcae760689aa60d6fee80", "tree": "9f97b4518cd06fe695476fc6cc4ff9ed8d5bdd58", "parents": [ "544b2c91a9f14f9565af1972203438b7f49afd48" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Fri Jun 17 16:50:34 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Wed Jun 22 19:26:27 2011 +0200" }, "message": "ptrace: kill task_ptrace()\n\ntask_ptrace(task) simply dereferences task-\u003eptrace and isn\u0027t even used\nconsistently only adding confusion. Kill it and directly access\n-\u003eptrace instead.\n\nThis doesn\u0027t introduce any behavior change.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "1c6b39ad3f01514fd8dd84b5b412bafb75c19388", "tree": "bd31cf5d3e67acc9ef23c97ddd92c961b73f40c7", "parents": [ "c008ba58af24dc5d0d8e9fe6e59d876910254761" ], "author": { "name": "John Stultz", "email": "john.stultz@linaro.org", "time": "Thu Jun 16 18:47:37 2011 -0700" }, "committer": { "name": "John Stultz", "email": "john.stultz@linaro.org", "time": "Tue Jun 21 16:32:28 2011 -0700" }, "message": "alarmtimers: Return -ENOTSUPP if no RTC device is present\n\nToralf Förster and Richard Weinberger noted that if there is\nno RTC device, the alarm timers core prints out an annoying\n\"ALARM timers will not wake from suspend\" message.\n\nThis warning has been removed in a previous patch, however\nthe issue still remains: The original idea was to support\nalarm timers even if there was no rtc device, as long as the\nsystem didn\u0027t go into suspend.\n\nHowever, after further consideration, communicating to the application\nthat alarmtimers are not fully functional seems like the better\nsolution.\n\nSo this patch makes it so we return -ENOTSUPP to any posix _ALARM\nclockid calls if there is no backing RTC device on the system.\n\nFurther this changes the behavior where when there is no rtc device\nwe will check for one on clock_getres, clock_gettime, timer_create,\nand timer_nsleep instead of on suspend.\n\nCC: Toralf Förster \u003ctoralf.foerster@gmx.de\u003e\nCC: Richard Weinberger \u003crichard@nod.at\nCC: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCC: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nReported-by: Toralf Förster \u003ctoralf.foerster@gmx.de\u003e\nReported by: Richard Weinberger \u003crichard@nod.at\u003e\nSigned-off-by: John Stultz \u003cjohn.stultz@linaro.org\u003e\n" }, { "commit": "c008ba58af24dc5d0d8e9fe6e59d876910254761", "tree": "0e718ce49992b6a7dfde619cd6ebf05afe06ae12", "parents": [ "e08f6d4131ab964420f0bcabecc68d75fb49df79" ], "author": { "name": "John Stultz", "email": "john.stultz@linaro.org", "time": "Thu Jun 16 18:27:09 2011 -0700" }, "committer": { "name": "John Stultz", "email": "john.stultz@linaro.org", "time": "Tue Jun 21 15:38:33 2011 -0700" }, "message": "alarmtimers: Handle late rtc module loading\n\nThe alarmtimers code currently picks a rtc device to use at\nlate init time. However, if your rtc driver is loaded as a module,\nit may be registered after the alarmtimers late init code, leaving\nthe alarmtimers nonfunctional.\n\nThis patch moves the the rtcdevice selection to when we actually try\nto use it, allowing us to make use of rtc modules that may have been\nloaded at any point since bootup.\n\nCC: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCC: Meelis Roos \u003cmroos@ut.ee\u003e\nReported-by: Meelis Roos \u003cmroos@ut.ee\u003e\nSigned-off-by: John Stultz \u003cjohn.stultz@linaro.org\u003e\n" }, { "commit": "8440f4b19494467883f8541b7aa28c7bbf6ac92b", "tree": "3682e034553d8b9ac676e17b144fe5b15cbb0174", "parents": [ "f76b168b6f117a49d36307053e1acbe30580ea5b" ], "author": { "name": "Michal Kubecek", "email": "mkubecek@suse.cz", "time": "Sat Jun 18 20:34:01 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Tue Jun 21 23:20:06 2011 +0200" }, "message": "PM: Free memory bitmaps if opening /dev/snapshot fails\n\nWhen opening /dev/snapshot device, snapshot_open() creates memory\nbitmaps which are freed in snapshot_release(). But if any of the\ncallbacks called by pm_notifier_call_chain() returns NOTIFY_BAD, open()\nfails, snapshot_release() is never called and bitmaps are not freed.\nNext attempt to open /dev/snapshot then triggers BUG_ON() check in\ncreate_basic_memory_bitmaps(). This happens e.g. when vmwatchdog module\nis active on s390x.\n\nSigned-off-by: Michal Kubecek \u003cmkubecek@suse.cz\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nCc: stable@kernel.org\n" }, { "commit": "8816ead9d8e7c2745788e0684797e1912b504f33", "tree": "2a619a821024d31be2ce6ff422f287792379fe5b", "parents": [ "357ed6b1a110048ff8106f99092d6c4a7aadb45a", "203db2952bc87f5d610c9ad53a7d02b85897721f", "d8ad7d1123a960cc9f276bd499f9325c6f5e1bd1", "b5199515c25cca622495eb9c6a8a1d275e775088", "c1f5c54b57341e872a9d375dccef7257f86033ef" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jun 19 09:00:18 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jun 19 09:00:18 2011 -0700" }, "message": "Merge branches \u0027perf-urgent-for-linus\u0027, \u0027sched-urgent-for-linus\u0027, \u0027timers-urgent-for-linus\u0027 and \u0027x86-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n tools/perf: Fix static build of perf tool\n tracing: Fix regression in printk_formats file\n\n* \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n generic-ipi: Fix kexec boot crash by initializing call_single_queue before enabling interrupts\n\n* \u0027timers-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n clocksource: Make watchdog robust vs. interruption\n timerfd: Fix wakeup of processes when timer is cancelled on clock change\n\n* \u0027x86-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n x86, MAINTAINERS: Add x86 MCE people\n x86, efi: Do not reserve boot services regions within reserved areas\n" }, { "commit": "357ed6b1a110048ff8106f99092d6c4a7aadb45a", "tree": "ff4eb7e809e547bc3c0680dfd51793a8f57b2063", "parents": [ "de505e709ffb09a7382ca8e0d8c7dbb171ba5830", "f8b7fc6b514f34a51875dd48dff70d4d17a54f38" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jun 19 08:56:56 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jun 19 08:56:56 2011 -0700" }, "message": "Merge branch \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n rcu: Move RCU_BOOST #ifdefs to header file\n rcu: use softirq instead of kthreads except when RCU_BOOST\u003dy\n rcu: Use softirq to address performance regression\n rcu: Simplify curing of load woes\n" }, { "commit": "879669961b11e7f40b518784863a259f735a72bf", "tree": "9bff5392e365caf656c9dd9be38f7471c182278c", "parents": [ "eb96c925152fc289311e5d7e956b919e9b60ab53" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Fri Jun 17 11:25:59 2011 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 17 09:40:48 2011 -0700" }, "message": "KEYS/DNS: Fix ____call_usermodehelper() to not lose the session keyring\n\n____call_usermodehelper() now erases any credentials set by the\nsubprocess_inf::init() function. The problem is that commit\n17f60a7da150 (\"capabilites: allow the application of capability limits\nto usermode helpers\") creates and commits new credentials with\nprepare_kernel_cred() after the call to the init() function. This wipes\nall keyrings after umh_keys_init() is called.\n\nThe best way to deal with this is to put the init() call just prior to\nthe commit_creds() call, and pass the cred pointer to init(). That\nmeans that umh_keys_init() and suchlike can modify the credentials\n_before_ they are published and potentially in use by the rest of the\nsystem.\n\nThis prevents request_key() from working as it is prevented from passing\nthe session keyring it set up with the authorisation token to\n/sbin/request-key, and so the latter can\u0027t assume the authority to\ninstantiate the key. This causes the in-kernel DNS resolver to fail\nwith ENOKEY unconditionally.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Eric Paris \u003ceparis@redhat.com\u003e\nTested-by: Jeff Layton \u003cjlayton@redhat.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d8ad7d1123a960cc9f276bd499f9325c6f5e1bd1", "tree": "0260df1b5b5b1601f56229c7dde54594d2dfebcb", "parents": [ "eb96c925152fc289311e5d7e956b919e9b60ab53" ], "author": { "name": "Takao Indoh", "email": "indou.takao@jp.fujitsu.com", "time": "Tue Mar 29 12:35:04 2011 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jun 17 10:17:12 2011 +0200" }, "message": "generic-ipi: Fix kexec boot crash by initializing call_single_queue before enabling interrupts\n\nThere is a problem that kdump(2nd kernel) sometimes hangs up due\nto a pending IPI from 1st kernel. Kernel panic occurs because IPI\ncomes before call_single_queue is initialized.\n\nTo fix the crash, rename init_call_single_data() to call_function_init()\nand call it in start_kernel() so that call_single_queue can be\ninitialized before enabling interrupts.\n\nThe details of the crash are:\n\n (1) 2nd kernel boots up\n\n (2) A pending IPI from 1st kernel comes when irqs are first enabled\n in start_kernel().\n\n (3) Kernel tries to handle the interrupt, but call_single_queue\n is not initialized yet at this point. As a result, in the\n generic_smp_call_function_single_interrupt(), NULL pointer\n dereference occurs when list_replace_init() tries to access\n \u0026q-\u003elist.next.\n\nTherefore this patch changes the name of init_call_single_data()\nto call_function_init() and calls it before local_irq_enable()\nin start_kernel().\n\nSigned-off-by: Takao Indoh \u003cindou.takao@jp.fujitsu.com\u003e\nReviewed-by: WANG Cong \u003cxiyou.wangcong@gmail.com\u003e\nAcked-by: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nAcked-by: Vivek Goyal \u003cvgoyal@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Milton Miller \u003cmiltonm@bga.com\u003e\nCc: Jens Axboe \u003caxboe@kernel.dk\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: kexec@lists.infradead.org\nLink: http://lkml.kernel.org/r/D6CBEE2F420741indou.takao@jp.fujitsu.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f8b7fc6b514f34a51875dd48dff70d4d17a54f38", "tree": "dc6583851e3536516761b0fd9b07f5a3a1743ebb", "parents": [ "a46e0899eec7a3069bcadd45dfba7bf67c6ed016" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Thu Jun 16 08:26:32 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Thu Jun 16 16:12:05 2011 -0700" }, "message": "rcu: Move RCU_BOOST #ifdefs to header file\n\nThe commit \"use softirq instead of kthreads except when RCU_BOOST\u003dy\"\njust applied #ifdef in place. This commit is a cleanup that moves\nthe newly #ifdef\u0027ed code to the header file kernel/rcutree_plugin.h.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "544b2c91a9f14f9565af1972203438b7f49afd48", "tree": "38615eeed1e50580a2341b5a9d15c98793d33c2d", "parents": [ "fb1d910c178ba0c5bc32d3e5a9e82e05b7aad3cd" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Jun 14 11:20:18 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jun 16 21:41:54 2011 +0200" }, "message": "ptrace: implement PTRACE_LISTEN\n\nThe previous patch implemented async notification for ptrace but it\nonly worked while trace is running. This patch introduces\nPTRACE_LISTEN which is suggested by Oleg Nestrov.\n\nIt\u0027s allowed iff tracee is in STOP trap and puts tracee into\nquasi-running state - tracee never really runs but wait(2) and\nptrace(2) consider it to be running. While ptracer is listening,\ntracee is allowed to re-enter STOP to notify an async event.\nListening state is cleared on the first notification. Ptracer can\nalso clear it by issuing INTERRUPT - tracee will re-trap into STOP\nwith listening state cleared.\n\nThis allows ptracer to monitor group stop state without running tracee\n- use INTERRUPT to put tracee into STOP trap, issue LISTEN and then\nwait(2) to wait for the next group stop event. When it happens,\nPTRACE_GETSIGINFO provides information to determine the current state.\n\nTest program follows.\n\n #define PTRACE_SEIZE\t\t0x4206\n #define PTRACE_INTERRUPT\t0x4207\n #define PTRACE_LISTEN\t\t0x4208\n\n #define PTRACE_SEIZE_DEVEL\t0x80000000\n\n static const struct timespec ts1s \u003d { .tv_sec \u003d 1 };\n\n int main(int argc, char **argv)\n {\n\t pid_t tracee, tracer;\n\t int i;\n\n\t tracee \u003d fork();\n\t if (!tracee)\n\t\t while (1)\n\t\t\t pause();\n\n\t tracer \u003d fork();\n\t if (!tracer) {\n\t\t siginfo_t si;\n\n\t\t ptrace(PTRACE_SEIZE, tracee, NULL,\n\t\t\t (void *)(unsigned long)PTRACE_SEIZE_DEVEL);\n\t\t ptrace(PTRACE_INTERRUPT, tracee, NULL, NULL);\n\t repeat:\n\t\t waitid(P_PID, tracee, NULL, WSTOPPED);\n\n\t\t ptrace(PTRACE_GETSIGINFO, tracee, NULL, \u0026si);\n\t\t if (!si.si_code) {\n\t\t\t printf(\"tracer: SIG %d\\n\", si.si_signo);\n\t\t\t ptrace(PTRACE_CONT, tracee, NULL,\n\t\t\t\t (void *)(unsigned long)si.si_signo);\n\t\t\t goto repeat;\n\t\t }\n\t\t printf(\"tracer: stopped\u003d%d signo\u003d%d\\n\",\n\t\t\t si.si_signo !\u003d SIGTRAP, si.si_signo);\n\t\t if (si.si_signo !\u003d SIGTRAP)\n\t\t\t ptrace(PTRACE_LISTEN, tracee, NULL, NULL);\n\t\t else\n\t\t\t ptrace(PTRACE_CONT, tracee, NULL, NULL);\n\t\t goto repeat;\n\t }\n\n\t for (i \u003d 0; i \u003c 3; i++) {\n\t\t nanosleep(\u0026ts1s, NULL);\n\t\t printf(\"mother: SIGSTOP\\n\");\n\t\t kill(tracee, SIGSTOP);\n\t\t nanosleep(\u0026ts1s, NULL);\n\t\t printf(\"mother: SIGCONT\\n\");\n\t\t kill(tracee, SIGCONT);\n\t }\n\t nanosleep(\u0026ts1s, NULL);\n\n\t kill(tracer, SIGKILL);\n\t kill(tracee, SIGKILL);\n\t return 0;\n }\n\nThis is identical to the program to test TRAP_NOTIFY except that\ntracee is PTRACE_LISTEN\u0027d instead of PTRACE_CONT\u0027d when group stopped.\nThis allows ptracer to monitor when group stop ends without running\ntracee.\n\n # ./test-listen\n tracer: stopped\u003d0 signo\u003d5\n mother: SIGSTOP\n tracer: SIG 19\n tracer: stopped\u003d1 signo\u003d19\n mother: SIGCONT\n tracer: stopped\u003d0 signo\u003d5\n tracer: SIG 18\n mother: SIGSTOP\n tracer: SIG 19\n tracer: stopped\u003d1 signo\u003d19\n mother: SIGCONT\n tracer: stopped\u003d0 signo\u003d5\n tracer: SIG 18\n mother: SIGSTOP\n tracer: SIG 19\n tracer: stopped\u003d1 signo\u003d19\n mother: SIGCONT\n tracer: stopped\u003d0 signo\u003d5\n tracer: SIG 18\n\n-v2: Moved JOBCTL_LISTENING check in wait_task_stopped() into\n task_stopped_code() as suggested by Oleg.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "fb1d910c178ba0c5bc32d3e5a9e82e05b7aad3cd", "tree": "dd889f33758a914cb538583073000bc21aeb1759", "parents": [ "fca26f260c528ee51a2e451b5b200aeb528f3e09" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Jun 14 11:20:17 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jun 16 21:41:53 2011 +0200" }, "message": "ptrace: implement TRAP_NOTIFY and use it for group stop events\n\nCurrently there\u0027s no way for ptracer to find out whether group stop\nfinished other than polling with INTERRUPT - GETSIGINFO - CONT\nsequence. This patch implements group stop notification for ptracer\nusing STOP traps.\n\nWhen group stop state of a seized tracee changes, JOBCTL_TRAP_NOTIFY\nis set, which schedules a STOP trap which is sticky - it isn\u0027t cleared\nby other traps and at least one STOP trap will happen eventually.\nSTOP trap is synchronization point for event notification and the\ntracer can determine the current group stop state by looking at the\nsignal number portion of exit code (si_status from waitid(2) or\nsi_code from PTRACE_GETSIGINFO).\n\nNotifications are generated both on start and end of group stops but,\nbecause group stop participation always happens before STOP trap, this\ndoesn\u0027t cause an extra trap while tracee is participating in group\nstop. The symmetry will be useful later.\n\nNote that this notification works iff tracee is not trapped.\nCurrently there is no way to be notified of group stop state changes\nwhile tracee is trapped. This will be addressed by a later patch.\n\nAn example program follows.\n\n #define PTRACE_SEIZE\t\t0x4206\n #define PTRACE_INTERRUPT\t0x4207\n\n #define PTRACE_SEIZE_DEVEL\t0x80000000\n\n static const struct timespec ts1s \u003d { .tv_sec \u003d 1 };\n\n int main(int argc, char **argv)\n {\n\t pid_t tracee, tracer;\n\t int i;\n\n\t tracee \u003d fork();\n\t if (!tracee)\n\t\t while (1)\n\t\t\t pause();\n\n\t tracer \u003d fork();\n\t if (!tracer) {\n\t\t siginfo_t si;\n\n\t\t ptrace(PTRACE_SEIZE, tracee, NULL,\n\t\t\t (void *)(unsigned long)PTRACE_SEIZE_DEVEL);\n\t\t ptrace(PTRACE_INTERRUPT, tracee, NULL, NULL);\n\t repeat:\n\t\t waitid(P_PID, tracee, NULL, WSTOPPED);\n\n\t\t ptrace(PTRACE_GETSIGINFO, tracee, NULL, \u0026si);\n\t\t if (!si.si_code) {\n\t\t\t printf(\"tracer: SIG %d\\n\", si.si_signo);\n\t\t\t ptrace(PTRACE_CONT, tracee, NULL,\n\t\t\t\t (void *)(unsigned long)si.si_signo);\n\t\t\t goto repeat;\n\t\t }\n\t\t printf(\"tracer: stopped\u003d%d signo\u003d%d\\n\",\n\t\t\t si.si_signo !\u003d SIGTRAP, si.si_signo);\n\t\t ptrace(PTRACE_CONT, tracee, NULL, NULL);\n\t\t goto repeat;\n\t }\n\n\t for (i \u003d 0; i \u003c 3; i++) {\n\t\t nanosleep(\u0026ts1s, NULL);\n\t\t printf(\"mother: SIGSTOP\\n\");\n\t\t kill(tracee, SIGSTOP);\n\t\t nanosleep(\u0026ts1s, NULL);\n\t\t printf(\"mother: SIGCONT\\n\");\n\t\t kill(tracee, SIGCONT);\n\t }\n\t nanosleep(\u0026ts1s, NULL);\n\n\t kill(tracer, SIGKILL);\n\t kill(tracee, SIGKILL);\n\t return 0;\n }\n\nIn the above program, tracer keeps tracee running and gets\nnotification of each group stop state changes.\n\n # ./test-notify\n tracer: stopped\u003d0 signo\u003d5\n mother: SIGSTOP\n tracer: SIG 19\n tracer: stopped\u003d1 signo\u003d19\n mother: SIGCONT\n tracer: stopped\u003d0 signo\u003d5\n tracer: SIG 18\n mother: SIGSTOP\n tracer: SIG 19\n tracer: stopped\u003d1 signo\u003d19\n mother: SIGCONT\n tracer: stopped\u003d0 signo\u003d5\n tracer: SIG 18\n mother: SIGSTOP\n tracer: SIG 19\n tracer: stopped\u003d1 signo\u003d19\n mother: SIGCONT\n tracer: stopped\u003d0 signo\u003d5\n tracer: SIG 18\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "fca26f260c528ee51a2e451b5b200aeb528f3e09", "tree": "8c64ecdcece48b55e79bbb7f376a834fc99804a3", "parents": [ "3544d72a0e10d0aa1c1bd59ed77a53a59cdc12f7" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Jun 14 11:20:16 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jun 16 21:41:53 2011 +0200" }, "message": "ptrace: implement PTRACE_INTERRUPT\n\nCurrently, there\u0027s no way to trap a running ptracee short of sending a\nsignal which has various side effects. This patch implements\nPTRACE_INTERRUPT which traps ptracee without any signal or job control\nrelated side effect.\n\nThe implementation is almost trivial. It uses the group stop trap -\nSIGTRAP | PTRACE_EVENT_STOP \u003c\u003c 8. A new trap flag\nJOBCTL_TRAP_INTERRUPT is added, which is set on PTRACE_INTERRUPT and\ncleared when any trap happens. As INTERRUPT should be useable\nregardless of the current state of tracee, task_is_traced() test in\nptrace_check_attach() is skipped for INTERRUPT.\n\nPTRACE_INTERRUPT is available iff tracee is attached with\nPTRACE_SEIZE.\n\nTest program follows.\n\n #define PTRACE_SEIZE\t\t0x4206\n #define PTRACE_INTERRUPT\t0x4207\n\n #define PTRACE_SEIZE_DEVEL\t0x80000000\n\n static const struct timespec ts100ms \u003d { .tv_nsec \u003d 100000000 };\n static const struct timespec ts1s \u003d { .tv_sec \u003d 1 };\n static const struct timespec ts3s \u003d { .tv_sec \u003d 3 };\n\n int main(int argc, char **argv)\n {\n\t pid_t tracee;\n\n\t tracee \u003d fork();\n\t if (tracee \u003d\u003d 0) {\n\t\t nanosleep(\u0026ts100ms, NULL);\n\t\t while (1) {\n\t\t\t printf(\"tracee: alive pid\u003d%d\\n\", getpid());\n\t\t\t nanosleep(\u0026ts1s, NULL);\n\t\t }\n\t }\n\n\t if (argc \u003e 1)\n\t\t kill(tracee, SIGSTOP);\n\n\t nanosleep(\u0026ts100ms, NULL);\n\n\t ptrace(PTRACE_SEIZE, tracee, NULL,\n\t\t (void *)(unsigned long)PTRACE_SEIZE_DEVEL);\n\t if (argc \u003e 1) {\n\t\t waitid(P_PID, tracee, NULL, WSTOPPED);\n\t\t ptrace(PTRACE_CONT, tracee, NULL, NULL);\n\t }\n\t nanosleep(\u0026ts3s, NULL);\n\n\t printf(\"tracer: INTERRUPT and DETACH\\n\");\n\t ptrace(PTRACE_INTERRUPT, tracee, NULL, NULL);\n\t waitid(P_PID, tracee, NULL, WSTOPPED);\n\t ptrace(PTRACE_DETACH, tracee, NULL, NULL);\n\t nanosleep(\u0026ts3s, NULL);\n\n\t printf(\"tracer: exiting\\n\");\n\t kill(tracee, SIGKILL);\n\t return 0;\n }\n\nWhen called without argument, tracee is seized from running state,\ninterrupted and then detached back to running state.\n\n # ./test-interrupt\n tracee: alive pid\u003d4546\n tracee: alive pid\u003d4546\n tracee: alive pid\u003d4546\n tracer: INTERRUPT and DETACH\n tracee: alive pid\u003d4546\n tracee: alive pid\u003d4546\n tracee: alive pid\u003d4546\n tracer: exiting\n\nWhen called with argument, tracee is seized from stopped state,\ncontinued, interrupted and then detached back to stopped state.\n\n # ./test-interrupt 1\n tracee: alive pid\u003d4548\n tracee: alive pid\u003d4548\n tracee: alive pid\u003d4548\n tracer: INTERRUPT and DETACH\n tracer: exiting\n\nBefore PTRACE_INTERRUPT, once the tracee was running, there was no way\nto trap tracee and do PTRACE_DETACH without causing side effect.\n\n-v2: Updated to use task_set_jobctl_pending() so that it doesn\u0027t end\n up scheduling TRAP_STOP if child is dying which may make the\n child unkillable. Spotted by Oleg.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "3544d72a0e10d0aa1c1bd59ed77a53a59cdc12f7", "tree": "27eb767b5cb98f58cccb5b7053a58bccd105f9d0", "parents": [ "73ddff2bee159ffb580bd24faf625cd5e628f5ec" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Jun 14 11:20:15 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jun 16 21:41:53 2011 +0200" }, "message": "ptrace: implement PTRACE_SEIZE\n\nPTRACE_ATTACH implicitly issues SIGSTOP on attach which has side\neffects on tracee signal and job control states. This patch\nimplements a new ptrace request PTRACE_SEIZE which attaches a tracee\nwithout trapping it or affecting its signal and job control states.\n\nThe usage is the same with PTRACE_ATTACH but it takes PTRACE_SEIZE_*\nflags in @data. Currently, the only defined flag is\nPTRACE_SEIZE_DEVEL which is a temporary flag to enable PTRACE_SEIZE.\nPTRACE_SEIZE will change ptrace behaviors outside of attach itself.\nThe changes will be implemented gradually and the DEVEL flag is to\nprevent programs which expect full SEIZE behavior from using it before\nall the behavior modifications are complete while allowing unit\ntesting. The flag will be removed once SEIZE behaviors are completely\nimplemented.\n\n* PTRACE_SEIZE, unlike ATTACH, doesn\u0027t force tracee to trap. After\n attaching tracee continues to run unless a trap condition occurs.\n\n* PTRACE_SEIZE doesn\u0027t affect signal or group stop state.\n\n* If PTRACE_SEIZE\u0027d, group stop uses PTRACE_EVENT_STOP trap which uses\n exit_code of (signr | PTRACE_EVENT_STOP \u003c\u003c 8) where signr is one of\n the stopping signals if group stop is in effect or SIGTRAP\n otherwise, and returns usual trap siginfo on PTRACE_GETSIGINFO\n instead of NULL.\n\nSeizing sets PT_SEIZED in -\u003eptrace of the tracee. This flag will be\nused to determine whether new SEIZE behaviors should be enabled.\n\nTest program follows.\n\n #define PTRACE_SEIZE\t\t0x4206\n #define PTRACE_SEIZE_DEVEL\t0x80000000\n\n static const struct timespec ts100ms \u003d { .tv_nsec \u003d 100000000 };\n static const struct timespec ts1s \u003d { .tv_sec \u003d 1 };\n static const struct timespec ts3s \u003d { .tv_sec \u003d 3 };\n\n int main(int argc, char **argv)\n {\n\t pid_t tracee;\n\n\t tracee \u003d fork();\n\t if (tracee \u003d\u003d 0) {\n\t\t nanosleep(\u0026ts100ms, NULL);\n\t\t while (1) {\n\t\t\t printf(\"tracee: alive\\n\");\n\t\t\t nanosleep(\u0026ts1s, NULL);\n\t\t }\n\t }\n\n\t if (argc \u003e 1)\n\t\t kill(tracee, SIGSTOP);\n\n\t nanosleep(\u0026ts100ms, NULL);\n\n\t ptrace(PTRACE_SEIZE, tracee, NULL,\n\t\t (void *)(unsigned long)PTRACE_SEIZE_DEVEL);\n\t if (argc \u003e 1) {\n\t\t waitid(P_PID, tracee, NULL, WSTOPPED);\n\t\t ptrace(PTRACE_CONT, tracee, NULL, NULL);\n\t }\n\t nanosleep(\u0026ts3s, NULL);\n\t printf(\"tracer: exiting\\n\");\n\t return 0;\n }\n\nWhen the above program is called w/o argument, tracee is seized while\nrunning and remains running. When tracer exits, tracee continues to\nrun and print out messages.\n\n # ./test-seize-simple\n tracee: alive\n tracee: alive\n tracee: alive\n tracer: exiting\n tracee: alive\n tracee: alive\n\nWhen called with an argument, tracee is seized from stopped state and\ncontinued, and returns to stopped state when tracer exits.\n\n # ./test-seize\n tracee: alive\n tracee: alive\n tracee: alive\n tracer: exiting\n # ps -el|grep test-seize\n 1 T 0 4720 1 0 80 0 - 941 signal ttyS0 00:00:00 test-seize\n\n-v2: SEIZE doesn\u0027t schedule TRAP_STOP and leaves tracee running as Jan\n suggested.\n\n-v3: PTRACE_EVENT_STOP traps now report group stop state by signr. If\n group stop is in effect the stop signal number is returned as\n part of exit_code; otherwise, SIGTRAP. This was suggested by\n Denys and Oleg.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Jan Kratochvil \u003cjan.kratochvil@redhat.com\u003e\nCc: Denys Vlasenko \u003cvda.linux@googlemail.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "73ddff2bee159ffb580bd24faf625cd5e628f5ec", "tree": "218cf5101b67c98ef99814e59706976d3ad245c2", "parents": [ "dd1d6772692316fe35094085c5e4d9a370ad3462" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Jun 14 11:20:14 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Thu Jun 16 21:41:52 2011 +0200" }, "message": "job control: introduce JOBCTL_TRAP_STOP and use it for group stop trap\n\ndo_signal_stop() implemented both normal group stop and trap for group\nstop while ptraced. This approach has been enough but scheduled\nchanges require trap mechanism which can be used in more generic\nmanner and using group stop trap for generic trap site simplifies both\nuserland visible interface and implementation.\n\nThis patch adds a new jobctl flag - JOBCTL_TRAP_STOP. When set, it\ntriggers a trap site, which behaves like group stop trap, in\nget_signal_to_deliver() after checking for pending signals. While\nptraced, do_signal_stop() doesn\u0027t stop itself. It initiates group\nstop if requested and schedules JOBCTL_TRAP_STOP and returns. The\ncaller - get_signal_to_deliver() - is responsible for checking whether\nTRAP_STOP is pending afterwards and handling it.\n\nptrace_attach() is updated to use JOBCTL_TRAP_STOP instead of\nJOBCTL_STOP_PENDING and __ptrace_unlink() to clear all pending trap\nbits and TRAPPING so that TRAP_STOP and future trap bits don\u0027t linger\nafter detach.\n\nWhile at it, add proper function comment to do_signal_stop() and make\nit return bool.\n\n-v2: __ptrace_unlink() updated to clear JOBCTL_TRAP_MASK and TRAPPING\n instead of JOBCTL_PENDING_MASK. This avoids accidentally\n clearing JOBCTL_STOP_CONSUME. Spotted by Oleg.\n\n-v3: do_signal_stop() updated to return %false without dropping\n siglock while ptraced and TRAP_STOP check moved inside for(;;)\n loop after group stop participation. This avoids unnecessary\n relocking and also will help avoiding unnecessary traps by\n consuming group stop before handling pending traps.\n\n-v4: Jobctl trap handling moved into a separate function -\n do_jobctl_trap().\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "b5199515c25cca622495eb9c6a8a1d275e775088", "tree": "250fc4f3d02c58eddf770e9d040edeafd0012e76", "parents": [ "1123d93963cbd2546449d4d9f0c568e323cb0ac6" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Thu Jun 16 16:22:08 2011 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Thu Jun 16 19:30:53 2011 +0200" }, "message": "clocksource: Make watchdog robust vs. interruption\n\nThe clocksource watchdog code is interruptible and it has been\nobserved that this can trigger false positives which disable the TSC.\n\nThe reason is that an interrupt storm or a long running interrupt\nhandler between the read of the watchdog source and the read of the\nTSC brings the two far enough apart that the delta is larger than the\nunstable treshold. Move both reads into a short interrupt disabled\nregion to avoid that.\n\nReported-and-tested-by: Vernon Mauery \u003cvernux@us.ibm.com\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: stable@kernel.org\n" }, { "commit": "a46e0899eec7a3069bcadd45dfba7bf67c6ed016", "tree": "78158b4056fe1365d5086f66769abdc3ef2643c3", "parents": [ "09223371deac67d08ca0b70bd18787920284c967" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Jun 15 15:47:09 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Jun 15 23:07:21 2011 -0700" }, "message": "rcu: use softirq instead of kthreads except when RCU_BOOST\u003dy\n\nThis patch #ifdefs RCU kthreads out of the kernel unless RCU_BOOST\u003dy,\nthus eliminating context-switch overhead if RCU priority boosting has\nnot been configured.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "a1b6ae8ed01736dae19a33e74ea4e8dd88f891b5", "tree": "62019061cacdc90ba1454a8f9d227acbd7a64cde", "parents": [ "21c5977a836e399fc710ff2c5367845ed5c2527f", "0da938c44921cfb690283d3b0c9c48a10375db2c" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 15 21:45:18 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 15 21:45:18 2011 -0700" }, "message": "Merge branch \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n sched: Check if lowest_mask is initialized in find_lowest_rq()\n sched: Fix need_resched() when checking peempt\n" }, { "commit": "d2c32258798f813dc2be6cbc32f78aa5ac5cb205", "tree": "e44c0d0feeaa52fe7d7b02ed343f7f5b671c372a", "parents": [ "b0461a44a2f1fc052fc949ae19c3a5d684627b09" ], "author": { "name": "Josh Triplett", "email": "josh@joshtriplett.org", "time": "Wed Jun 15 15:08:47 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 15 20:04:01 2011 -0700" }, "message": "gcov: disable CONFIG_CONSTRUCTORS when not needed by CONFIG_GCOV_KERNEL\n\nCONFIG_CONSTRUCTORS controls support for running constructor functions at\nkernel init time. According to commit b99b87f70c7785ab (\"kernel:\nconstructor support\"), gcov (CONFIG_GCOV_KERNEL) needs this. However,\nCONFIG_CONSTRUCTORS currently defaults to y, with no option to disable it,\nand CONFIG_GCOV_KERNEL depends on it. Instead, default it to n and have\nCONFIG_GCOV_KERNEL select it, so that the normal case of\nCONFIG_GCOV_KERNEL\u003dn will result in CONFIG_CONSTRUCTORS\u003dn.\n\nObserved in the short list of \u003dy values in a minimal kernel configuration.\n\nSigned-off-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\nAcked-by: WANG Cong \u003cxiyou.wangcong@gmail.com\u003e\nAcked-by: Peter Oberparleiter \u003cpeter.oberparleiter@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "733eda7ac316cd4e550fa096e4ed42356dc546e7", "tree": "6522f47608fb97314a7b615b1cb1d6e2c58952c8", "parents": [ "37573e8c718277103f61f03741bdc5606d31b07e" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Jun 15 15:08:43 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 15 20:04:01 2011 -0700" }, "message": "memcg: clear mm-\u003eowner when last possible owner leaves\n\nThe following crash was reported:\n\n\u003e Call Trace:\n\u003e [\u003cffffffff81139792\u003e] mem_cgroup_from_task+0x15/0x17\n\u003e [\u003cffffffff8113a75a\u003e] __mem_cgroup_try_charge+0x148/0x4b4\n\u003e [\u003cffffffff810493f3\u003e] ? need_resched+0x23/0x2d\n\u003e [\u003cffffffff814cbf43\u003e] ? preempt_schedule+0x46/0x4f\n\u003e [\u003cffffffff8113afe8\u003e] mem_cgroup_charge_common+0x9a/0xce\n\u003e [\u003cffffffff8113b6d1\u003e] mem_cgroup_newpage_charge+0x5d/0x5f\n\u003e [\u003cffffffff81134024\u003e] khugepaged+0x5da/0xfaf\n\u003e [\u003cffffffff81078ea0\u003e] ? __init_waitqueue_head+0x4b/0x4b\n\u003e [\u003cffffffff81133a4a\u003e] ? add_mm_counter.constprop.5+0x13/0x13\n\u003e [\u003cffffffff81078625\u003e] kthread+0xa8/0xb0\n\u003e [\u003cffffffff814d13e8\u003e] ? sub_preempt_count+0xa1/0xb4\n\u003e [\u003cffffffff814d5664\u003e] kernel_thread_helper+0x4/0x10\n\u003e [\u003cffffffff814ce858\u003e] ? retint_restore_args+0x13/0x13\n\u003e [\u003cffffffff8107857d\u003e] ? __init_kthread_worker+0x5a/0x5a\n\nWhat happens is that khugepaged tries to charge a huge page against an mm\nwhose last possible owner has already exited, and the memory controller\ncrashes when the stale mm-\u003eowner is used to look up the cgroup to charge.\n\nmm-\u003eowner has never been set to NULL with the last owner going away, but\nnobody cared until khugepaged came along.\n\nEven then it wasn\u0027t a problem because the final mmput() on an mm was\nforced to acquire and release mmap_sem in write-mode, preventing an\nexiting owner to go away while the mmap_sem was held, and until \"692e0b3\nmm: thp: optimize memcg charge in khugepaged\", the memory cgroup charge\nwas protected by mmap_sem in read-mode.\n\nInstead of going back to relying on the mmap_sem to enforce lifetime of a\ntask, this patch ensures that mm-\u003eowner is properly set to NULL when the\nlast possible owner is exiting, which the memory controller can handle\njust fine.\n\n[akpm@linux-foundation.org: tweak comments]\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nReported-by: Hugh Dickins \u003chughd@google.com\u003e\nReported-by: Dave Jones \u003cdavej@redhat.com\u003e\nReviewed-by: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0da938c44921cfb690283d3b0c9c48a10375db2c", "tree": "7e9374a3ed16a4118f2f5d600067c471aaa80c70", "parents": [ "8dd0de8be31b4b966d17750a0b10df2f575c91ac" ], "author": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 18:36:25 2011 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jun 15 11:44:48 2011 +0200" }, "message": "sched: Check if lowest_mask is initialized in find_lowest_rq()\n\nOn system boot up, the lowest_mask is initialized with an\nearly_initcall(). But RT tasks may wake up on other\nearly_initcall() callers before the lowest_mask is initialized,\ncausing a system crash.\n\nCommit \"d72bce0e67 rcu: Cure load woes\" was the first commit\nto wake up RT tasks in early init. Before this commit this bug\nshould not happen.\n\nReported-by: Andrew Theurer \u003chabanero@linux.vnet.ibm.com\u003e\nTested-by: Andrew Theurer \u003chabanero@linux.vnet.ibm.com\u003e\nTested-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLink: http://lkml.kernel.org/r/20110614223657.824872966@goodmis.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8dd0de8be31b4b966d17750a0b10df2f575c91ac", "tree": "991b9dddf6ef092f94bba5af7609c13c8d7b113c", "parents": [ "2c53b436a30867eb6b47dd7bab23ba638d1fb0d2" ], "author": { "name": "Hillf Danton", "email": "dhillf@gmail.com", "time": "Tue Jun 14 18:36:24 2011 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jun 15 09:50:32 2011 +0200" }, "message": "sched: Fix need_resched() when checking peempt\n\nThe RT preempt check tests the wrong task if NEED_RESCHED is\nset. It currently checks the local CPU task. It is supposed to\ncheck the task that is running on the runqueue we are about to\nwake another task on.\n\nSigned-off-by: Hillf Danton \u003cdhillf@gmail.com\u003e\nReviewed-by: Yong Zhang \u003cyong.zhang0@gmail.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nLink: http://lkml.kernel.org/r/20110614223657.450239027@goodmis.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ada9c93312f7ec49514c68c211595ce2601cebae", "tree": "d20d678c04daf68705f3006e3bc2a00746f3eb18", "parents": [ "60b8b1de0dd2bf246f0e074d287bb3f0bc42a755" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Tue Jun 14 15:50:11 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 14 19:12:17 2011 -0700" }, "message": "signal.c: fix kernel-doc notation\n\nFix kernel-doc warnings in signal.c:\n\n Warning(kernel/signal.c:2374): No description found for parameter \u0027nset\u0027\n Warning(kernel/signal.c:2374): Excess function parameter \u0027set\u0027 description in \u0027sys_rt_sigprocmask\u0027\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "09223371deac67d08ca0b70bd18787920284c967", "tree": "0ad0354a93ac209c8cfd2b79d03d0462aa3c5c58", "parents": [ "9a432736904d386cda28b987b38ba14dae960ecc" ], "author": { "name": "Shaohua Li", "email": "shaohua.li@intel.com", "time": "Tue Jun 14 13:26:25 2011 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Jun 14 15:25:39 2011 -0700" }, "message": "rcu: Use softirq to address performance regression\n\nCommit a26ac2455ffcf3(rcu: move TREE_RCU from softirq to kthread)\nintroduced performance regression. In an AIM7 test, this commit degraded\nperformance by about 40%.\n\nThe commit runs rcu callbacks in a kthread instead of softirq. We observed\nhigh rate of context switch which is caused by this. Out test system has\n64 CPUs and HZ is 1000, so we saw more than 64k context switch per second\nwhich is caused by RCU\u0027s per-CPU kthread. A trace showed that most of\nthe time the RCU per-CPU kthread doesn\u0027t actually handle any callbacks,\nbut instead just does a very small amount of work handling grace periods.\nThis means that RCU\u0027s per-CPU kthreads are making the scheduler do quite\na bit of work in order to allow a very small amount of RCU-related\nprocessing to be done.\n\nAlex Shi\u0027s analysis determined that this slowdown is due to lock\ncontention within the scheduler. Unfortunately, as Peter Zijlstra points\nout, the scheduler\u0027s real-time semantics require global action, which\nmeans that this contention is inherent in real-time scheduling. (Yes,\nperhaps someone will come up with a workaround -- otherwise, -rt is not\ngoing to do well on large SMP systems -- but this patch will work around\nthis issue in the meantime. And \"the meantime\" might well be forever.)\n\nThis patch therefore re-introduces softirq processing to RCU, but only\nfor core RCU work. RCU callbacks are still executed in kthread context,\nso that only a small amount of RCU work runs in softirq context in the\ncommon case. This should minimize ksoftirqd execution, allowing us to\nskip boosting of ksoftirqd for CONFIG_RCU_BOOST\u003dy kernels.\n\nSigned-off-by: Shaohua Li \u003cshaohua.li@intel.com\u003e\nTested-by: \"Alex,Shi\" \u003calex.shi@intel.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "9a432736904d386cda28b987b38ba14dae960ecc", "tree": "20294203f9c6132d79737e9ab54c746546afe7d4", "parents": [ "59c5f46fbe01a00eedf54a23789634438bb80603" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon May 30 20:38:55 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Jun 14 15:25:15 2011 -0700" }, "message": "rcu: Simplify curing of load woes\n\nMake the functions creating the kthreads wake them up. Leverage the\nfact that the per-node and boost kthreads can run anywhere, thus\ndispensing with the need to wake them up once the incoming CPU has\ngone fully online.\n\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nTested-by: Daniel J Blueman \u003cdaniel.blueman@gmail.com\u003e\n" }, { "commit": "c78a9b9b8e36b8de302eddbe7a1688af3d9650ff", "tree": "3857996cf30ae6a60b5afe2e1e3e30f75fbca05e", "parents": [ "842c895d140a75e5d67fa346213deb3ca2b460f8", "5f127133ee432d0b83ee26e8e3a3d7828ab5f2b1" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jun 13 10:45:49 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jun 13 10:45:49 2011 -0700" }, "message": "Merge branch \u0027perf-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n ftrace: Revert 8ab2b7efd ftrace: Remove unnecessary disabling of irqs\n kprobes/trace: Fix kprobe selftest for gcc 4.6\n ftrace: Fix possible undefined return code\n oprofile, dcookies: Fix possible circular locking dependency\n oprofile: Fix locking dependency in sync_start()\n oprofile: Free potentially owned tasks in case of errors\n oprofile, x86: Add comments to IBS LVT offset initialization\n" }, { "commit": "13863a66c9c8a663665445cf05d68de96ff31830", "tree": "cb7864cf23b6f26f3eb11cfe09526eb7110a0e9a", "parents": [ "7f45e5cd1718ed769295033ca214032848a0097d" ], "author": { "name": "Jesper Juhl", "email": "jj@chaosbits.net", "time": "Thu Jun 09 23:14:58 2011 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Jun 10 10:53:42 2011 +0200" }, "message": "genirq: Prevent potential NULL dereference in irq_set_irq_wake()\n\nIn kernel/irq/manage.c::irq_set_irq_wake() we call\nirq_get_desc_buslock() which may return NULL, but the code\ndereferences the result unconditionally.\n\nirq_set_irq_wake() has lots of callers - I checked a few and I couldn\u0027t\nfind anything that guarantees that they won\u0027t call it with some input that\nwill cause irq_get_desc_buslock() to return NULL, so I think it\u0027s a good\nthing to test and -EINVAL was the most sane error code in this situation\nthat I could think of.\n\nNot all callers test the return value of irq_set_irq_wake(), but those\nthat do take !\u003d 0 to mean error as far as I can see, so they should be\nfine. I guess those that don\u0027t test actually should, but that\u0027s a\ndifferent issue.\n\nSigned-off-by: Jesper Juhl \u003cjj@chaosbits.net\u003e\nLink: http://lkml.kernel.org/r/alpine.LNX.2.00.1106092300360.17868@swampdragon.chaosbits.net\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "db5e7ecc4abc91b9f26f0c0d79ef88a51e987d90", "tree": "022c475cc132e64f01c0765d2d965c0aa5df2286", "parents": [ "5cf42f7055648aaba68ce95ecec69128d7fbf65f" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Jun 09 08:40:59 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jun 09 08:42:15 2011 -0400" }, "message": "tracing: Fix regression in printk_formats file\n\nThe fix to fix the printk_formats of modules broke the\nprintk_formats of trace_printks in the kernel.\n\nThe update of what to show via the seq_file was only updated\nif the passed in fmt was NULL, which happens only on the first\niteration. The result was showing the first format every time\ninstead of iterating through the available formats.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "33726bf2140a0e7c9de3ccd7cba6d69962f0b773", "tree": "a4f5bca74d61072533806a2fe7f257357cae1ce2", "parents": [ "5b28f6a25ee202046e2d57bd431671bc23cf3dd1", "d7ebe75b065a7c2d58ffc12f9d2e00d5ea4e71eb" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 08 08:36:15 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 08 08:36:15 2011 -0700" }, "message": "Merge branch \u0027perf-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n perf: Fix comments in include/linux/perf_event.h\n perf: Comment /proc/sys/kernel/perf_event_paranoid to be part of user ABI\n perf python: Fix argument name list of read_on_cpu()\n perf evlist: Don\u0027t die if sample_{id_all|type} is invalid\n perf python: Use exception to propagate errors\n perf evlist: Remove dependency on debug routines\n perf, cgroups: Fix up for new API\n" }, { "commit": "cb0a02ecf95e5f47d92e7d4c513cc1f7aeb40cda", "tree": "3e9b2341855a1b5ddac5f0edb74a679111f8a350", "parents": [ "d681f1204d701cafbc45fa90e0ac977acddc33cc", "c5182b8867e189e14a8df5dbfcba1c73f286e061" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 07 19:21:11 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 07 19:21:11 2011 -0700" }, "message": "Merge branch \u0027irq-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027irq-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n genirq: Ensure we locate the passed IRQ in irq_alloc_descs()\n genirq: Fix descriptor init on non-sparse IRQs\n irq: Handle spurios irq detection for threaded irqs\n genirq: Print threaded handler in spurious debug output\n" }, { "commit": "6715a52a581c891e9a2034abe1c81ddb482d70b3", "tree": "03bac8851232d11382af718c2d10559cc16e4f0f", "parents": [ "ef2398019b305827ea7130ebaf7bf521b444530e", "6c6c54e1807faf116724451ef2bd14993780470a" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 07 19:20:28 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 07 19:20:28 2011 -0700" }, "message": "Merge branch \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n sched: Fix/clarify set_task_cpu() locking rules\n lockdep: Fix lock_is_held() on recursion\n sched: Fix schedstat.nr_wakeups_migrate\n sched: Fix cross-cpu clock sync on remote wakeups\n" }, { "commit": "a4f18ed11a4ddf327dd91cd19e237278600ad327", "tree": "bbe96241c6db2be16e881920a3312ec937ed7cd1", "parents": [ "265a5b7ee3eb21a4d0e53e17d59ba6eada91af39" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Jun 07 09:26:46 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 07 14:49:19 2011 -0400" }, "message": "ftrace: Revert 8ab2b7efd ftrace: Remove unnecessary disabling of irqs\n\nRevert the commit that removed the disabling of interrupts around\nthe initial modifying of mcount callers to nops, and update the comment.\n\nThe original comment was outdated and stated that the interrupts were\nbeing disabled to prevent kstop machine, which was required with the\nold ftrace daemon, but was no longer the case.\n\nWhat the comment failed to mention was that interrupts needed to be\ndisabled to keep interrupts from preempting the modifying of the code\nand then executing the code that was partially modified.\n\nRevert the commit and update the comment.\n\nReported-by: Richard W.M. Jones \u003crjones@redhat.com\u003e\nTested-by: Richard W.M. Jones \u003crjones@redhat.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "265a5b7ee3eb21a4d0e53e17d59ba6eada91af39", "tree": "52ad853f49e8949a307f475115cc682d44753287", "parents": [ "0aff1c0cef13b34c17e81a502336fad738151c37" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon Jun 06 22:35:13 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 07 14:47:36 2011 -0400" }, "message": "kprobes/trace: Fix kprobe selftest for gcc 4.6\n\nWith gcc 4.6, the self test kprobe function:\n\n kprobe_trace_selftest_target()\n\nis optimized such that kallsyms does not list it. The kprobes\ntest uses this function to insert a probe and test it. But\nit will fail the test if the function is not listed in kallsyms.\n\nAdding a __used annotation keeps the symbol in the kallsyms table.\n\nSuggested-by: David Daney \u003cddaney@caviumnetworks.com\u003e\nCc: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "6c6c54e1807faf116724451ef2bd14993780470a", "tree": "c306ec3d4876b70022b81f577d96ddb1c643c1d5", "parents": [ "f2513cde93f0957d5dc6c09bc24b0cccd27d8e1d" ], "author": { "name": "Peter Zijlstra", "email": "peterz@infradead.org", "time": "Fri Jun 03 17:37:07 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jun 07 12:26:40 2011 +0200" }, "message": "sched: Fix/clarify set_task_cpu() locking rules\n\nSergey reported a CONFIG_PROVE_RCU warning in push_rt_task where\nset_task_cpu() was called with both relevant rq-\u003elocks held, which\nshould be sufficient for running tasks since holding its rq-\u003elock\nwill serialize against sched_move_task().\n\nUpdate the comments and fix the task_group() lockdep test.\n\nReported-and-tested-by: Sergey Senozhatsky \u003csergey.senozhatsky@gmail.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/1307115427.2353.3456.camel@twins\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f2513cde93f0957d5dc6c09bc24b0cccd27d8e1d", "tree": "b461cb0836170eb555b20818802c121c79e76d33", "parents": [ "f339b9dc1f03591761d5d930800db24bc0eda1e1" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Jun 06 12:32:43 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jun 07 12:25:50 2011 +0200" }, "message": "lockdep: Fix lock_is_held() on recursion\n\nThe main lock_is_held() user is lockdep_assert_held(), avoid false\nassertions in lockdep_off() sections by unconditionally reporting the\nlock is taken.\n\n[ the reason this is important is a lockdep_assert_held() in ttwu()\n which triggers a warning under lockdep_off() as in printk() which\n can trigger another wakeup and lock up due to spinlock\n recursion, as reported and heroically debugged by Arne Jansen ]\n\nReported-and-tested-by: Arne Jansen \u003clists@die-jansens.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: \u003cstable@kernel.org\u003e\nLink: http://lkml.kernel.org/r/1307398759.2497.966.camel@laptop\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "0aff1c0cef13b34c17e81a502336fad738151c37", "tree": "3bf383429c3d948bd34ff71ae78d82bb2439fab5", "parents": [ "d7ebe75b065a7c2d58ffc12f9d2e00d5ea4e71eb" ], "author": { "name": "GuoWen Li", "email": "guowen.li.linux@gmail.com", "time": "Wed Jun 01 19:18:47 2011 +0800" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Mon Jun 06 22:34:25 2011 -0400" }, "message": "ftrace: Fix possible undefined return code\n\nkernel/trace/ftrace.c: In function \u0027ftrace_regex_write.clone.15\u0027:\nkernel/trace/ftrace.c:2743:6: warning: \u0027ret\u0027 may be used uninitialized in this\nfunction\n\nSigned-off-by: GuoWen Li \u003cguowen.li.linux@gmail.com\u003e\nLink: http://lkml.kernel.org/r/201106011918.47939.guowen.li.linux@gmail.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "dd1d6772692316fe35094085c5e4d9a370ad3462", "tree": "d6f2743d96b93ded07d35a0af2cafa6056bfdc74", "parents": [ "62c124ff3bcdb414af635c2bf822c9e4f2a5abfa" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:14:00 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:11 2011 +0200" }, "message": "signal: remove three noop tracehooks\n\nRemove the following three noop tracehooks in signals.c.\n\n* tracehook_force_sigpending()\n* tracehook_get_signal()\n* tracehook_finish_jctl()\n\nThe code area is about to be updated and these hooks don\u0027t do anything\nother than obfuscating the logic.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "62c124ff3bcdb414af635c2bf822c9e4f2a5abfa", "tree": "5d279211e098d24245d49e394d84aa8cfdb6f277", "parents": [ "7dd3db54e77d21eb95e145f19ba53f68250d0e73" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:14:00 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:11 2011 +0200" }, "message": "ptrace: use bit_waitqueue for TRAPPING instead of wait_chldexit\n\nptracer-\u003esignal-\u003ewait_chldexit was used to wait for TRAPPING; however,\n-\u003ewait_chldexit was already complicated with waker-side filtering\nwithout adding TRAPPING wait on top of it. Also, it unnecessarily\nmade TRAPPING clearing depend on the current ptrace relationship - if\nthe ptracee is detached, wakeup is lost.\n\nThere is no reason to use signal-\u003ewait_chldexit here. We\u0027re just\nwaiting for JOBCTL_TRAPPING bit to clear and given the relatively\ninfrequent use of ptrace, bit_waitqueue can serve it perfectly.\n\nThis patch makes JOBCTL_TRAPPING wait use bit_waitqueue instead of\nsignal-\u003ewait_chldexit.\n\n-v2: Use JOBCTL_*_BIT macros instead of ilog2() as suggested by Linus.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "7dd3db54e77d21eb95e145f19ba53f68250d0e73", "tree": "628e44b22e6fbf2828cf2c533c41b3d24f3e3ec9", "parents": [ "6dfca32984237a8a011b5bf367e53341a265b2a4" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:14:00 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:11 2011 +0200" }, "message": "job control: introduce task_set_jobctl_pending()\n\ntask-\u003ejobctl currently hosts JOBCTL_STOP_PENDING and will host TRAP\npending bits too. Setting pending conditions on a dying task may make\nthe task unkillable. Currently, each setting site is responsible for\nchecking for the condition but with to-be-added job control traps this\nbecomes too fragile.\n\nThis patch adds task_set_jobctl_pending() which should be used when\nsetting task-\u003ejobctl bits to schedule a stop or trap. The function\nperforms the followings to ease setting pending bits.\n\n* Sanity checks.\n\n* If fatal signal is pending or PF_EXITING is set, no bit is set.\n\n* STOP_SIGMASK is automatically cleared if new value is being set.\n\ndo_signal_stop() and ptrace_attach() are updated to use\ntask_set_jobctl_pending() instead of setting STOP_PENDING explicitly.\nThe surrounding structures around setting are changed to fit\ntask_set_jobctl_pending() better but there should be no userland\nvisible behavior difference.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "6dfca32984237a8a011b5bf367e53341a265b2a4", "tree": "a879c682f00921959ee28b563b9024c0ac54f861", "parents": [ "3759a0d94c18764247b66511d1038f2b93aa95de" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:14:00 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:11 2011 +0200" }, "message": "job control: make task_clear_jobctl_pending() clear TRAPPING automatically\n\nJOBCTL_TRAPPING indicates that ptracer is waiting for tracee to\n(re)transit into TRACED. task_clear_jobctl_pending() must be called\nwhen either tracee enters TRACED or the transition is cancelled for\nsome reason. The former is achieved by explicitly calling\ntask_clear_jobctl_pending() in ptrace_stop() and the latter by calling\nit at the end of do_signal_stop().\n\nCalling task_clear_jobctl_trapping() at the end of do_signal_stop()\nlimits the scope TRAPPING can be used and is fragile in that seemingly\nunrelated changes to tracee\u0027s control flow can lead to stuck TRAPPING.\n\nWe already have task_clear_jobctl_pending() calls on those cancelling\nevents to clear JOBCTL_STOP_PENDING. Cancellations can be handled by\nmaking those call sites use JOBCTL_PENDING_MASK instead and updating\ntask_clear_jobctl_pending() such that task_clear_jobctl_trapping() is\ncalled automatically if no stop/trap is pending.\n\nThis patch makes the above changes and removes the fallback\ntask_clear_jobctl_trapping() call from do_signal_stop().\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "3759a0d94c18764247b66511d1038f2b93aa95de", "tree": "ec56295fc1bd252bcbe1cb8552102deeef03bbb7", "parents": [ "81be24b8cdeb69e62f9d1b6b425fd9ffdd37f581" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:14:00 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:10 2011 +0200" }, "message": "job control: introduce JOBCTL_PENDING_MASK and task_clear_jobctl_pending()\n\nThis patch introduces JOBCTL_PENDING_MASK and replaces\ntask_clear_jobctl_stop_pending() with task_clear_jobctl_pending()\nwhich takes an extra @mask argument.\n\nJOBCTL_PENDING_MASK is currently equal to JOBCTL_STOP_PENDING but\nfuture patches will add more bits. recalc_sigpending_tsk() is updated\nto use JOBCTL_PENDING_MASK instead.\n\ntask_clear_jobctl_pending() takes @mask which in subset of\nJOBCTL_PENDING_MASK and clears the relevant jobctl bits. If\nJOBCTL_STOP_PENDING is set, other STOP bits are cleared together. All\ntask_clear_jobctl_stop_pending() users are updated to call\ntask_clear_jobctl_pending() with JOBCTL_STOP_PENDING which is\nfunctionally identical to task_clear_jobctl_stop_pending().\n\nThis patch doesn\u0027t cause any functional change.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "81be24b8cdeb69e62f9d1b6b425fd9ffdd37f581", "tree": "63afd141fdb380c7b00a01a2080ace6bcc232386", "parents": [ "755e276b3326f300585435d2f3876e66e248c476" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:13:59 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:10 2011 +0200" }, "message": "ptrace: relocate set_current_state(TASK_TRACED) in ptrace_stop()\n\nIn ptrace_stop(), after arch hook is done, the task state and jobctl\nbits are updated while holding siglock. The ordering requirement\nthere is that TASK_TRACED is set before JOBCTL_TRAPPING is cleared to\nprevent ptracer waiting on TRAPPING doesn\u0027t end up waking up TRACED is\nactually set and sees TASK_RUNNING in wait(2).\n\nMove set_current_state(TASK_TRACED) to the top of the block and\nreorganize comments. This makes the ordering more obvious\n(TASK_TRACED before other updates) and helps future updates to group\nstop participation.\n\nThis patch doesn\u0027t cause any functional change.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "755e276b3326f300585435d2f3876e66e248c476", "tree": "67ee93cf68a1ee0e307c0d8fcd4514a61dcdd697", "parents": [ "a8f072c1d624a627b67f2ace2f0c25d856ef4e54" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:13:59 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:10 2011 +0200" }, "message": "ptrace: ptrace_check_attach(): rename @kill to @ignore_state and add comments\n\nPTRACE_INTERRUPT is going to be added which should also skip\ntask_is_traced() check in ptrace_check_attach(). Rename @kill to\n@ignore_state and make it bool. Add function comment while at it.\n\nThis patch doesn\u0027t introduce any behavior difference.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "a8f072c1d624a627b67f2ace2f0c25d856ef4e54", "tree": "9ba3e96aa874b08c7156a3584f27187bcdbdd9cd", "parents": [ "0b1007c3578569469a6fab6ae5cca918ccdc3ee1" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:13:59 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:09 2011 +0200" }, "message": "job control: rename signal-\u003egroup_stop and flags to jobctl and update them\n\nsignal-\u003egroup_stop currently hosts mostly group stop related flags;\nhowever, it\u0027s gonna be used for wider purposes and the GROUP_STOP_\nflag prefix becomes confusing. Rename signal-\u003egroup_stop to\nsignal-\u003ejobctl and rename all GROUP_STOP_* flags to JOBCTL_*.\n\nBit position macros JOBCTL_*_BIT are defined and JOBCTL_* flags are\ndefined in terms of them to allow using bitops later.\n\nWhile at it, reassign JOBCTL_TRAPPING to bit 22 to better accomodate\nfuture additions.\n\nThis doesn\u0027t cause any functional change.\n\n-v2: JOBCTL_*_BIT macros added as suggested by Linus.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "0b1007c3578569469a6fab6ae5cca918ccdc3ee1", "tree": "f6a5254c6f8caeb843fc1a130f7642b9a55a2694", "parents": [ "23c79d31a3dd2602ee1a5ff31303b2d7a2d3c159" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Thu Jun 02 11:13:59 2011 +0200" }, "committer": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Sat Jun 04 18:17:09 2011 +0200" }, "message": "ptrace: remove silly wait_trap variable from ptrace_attach()\n\nRemove local variable wait_trap which determines whether to wait for\n!TRAPPING or not and simply wait for it if attach was successful.\n\n-v2: Oleg pointed out wait should happen iff attach was successful.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "aa4a221875873d2a1f9656cb7fd7e545e952b4fa", "tree": "44f66345c06c94cfc95d17b337d45e09917e475d", "parents": [ "710054ba25c0d1f8f41c22ce13ba336503fb5318" ], "author": { "name": "Vince Weaver", "email": "vweaver1@eecs.utk.edu", "time": "Fri Jun 03 17:54:40 2011 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Jun 04 12:22:04 2011 +0200" }, "message": "perf: Comment /proc/sys/kernel/perf_event_paranoid to be part of user ABI\n\nTurns out that distro packages use this file as an indicator of\nthe perf event subsystem - this is easier to check for from scripts\nthan the existence of the system call.\n\nThis is easy enough to keep around for the kernel, so add a\ncomment to make sure it stays so.\n\nSigned-off-by: Vince Weaver \u003cvweaver1@eecs.utk.edu\u003e\nCc: David Ahern \u003cdsahern@gmail.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus@samba.org\nCc: acme@redhat.com\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/r/alpine.DEB.2.00.1106031751170.29381@cl320.eecs.utk.edu\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "710054ba25c0d1f8f41c22ce13ba336503fb5318", "tree": "f9b09b722bf511841539173d946f90a20fc2e59a", "parents": [ "74c355fbdfedd3820046dba4f537876cea54c207", "b273fa9716aa1564bee88ceee62f9042981cdc81" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Jun 04 12:13:06 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Jun 04 12:13:06 2011 +0200" }, "message": "Merge branch \u0027perf/urgent\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent\n" }, { "commit": "1c3cc11602111d1318c2a5743bd2e88c82813927", "tree": "d46a1e4a1914f3bc307f8f6215864144926d0193", "parents": [ "1b054b67d3bfc6dca9f634c104780f3f24ff3eec" ], "author": { "name": "Sebastian Andrzej Siewior", "email": "sebastian@breakpoint.cc", "time": "Sat May 21 12:58:28 2011 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Jun 03 15:02:32 2011 +0200" }, "message": "timers: Consider slack value in mod_timer()\n\nThere is an optimization which does not update the timer if the timer\nwas pending and the expiration time was unchanged.\n\nSince commit 3bbb9ec9 (\"timers: Introduce the concept of timer slack\nfor legacy timers\") this optimization is no longer applied for timers\nwhere the expiration time got extended due to the slack value. So we\nneed to check again after the expiration time might have been updated.\n\n[ tglx: Made it a single check by applying slack first and sorting\n out the slack \u003d 0 value (all timeouts \u003c 256 jiffies) early ]\n\nSigned-off-by: Sebastian Andrzej Siewior \u003csebastian@breakpoint.cc\u003e\nLink: http://lkml.kernel.org/r/20110521105828.GA29442@Chamillionaire.breakpoint.cc\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" } ], "next": "c5182b8867e189e14a8df5dbfcba1c73f286e061" }