)]}' { "log": [ { "commit": "ddf6e0e50723b62ac76ed18eb53e9417c6eefba7", "tree": "afee7574ab5b3a8e3d907327e73c2785cd275abe", "parents": [ "d06c27b22aa66e48e32f03f9387328a9af9b0625" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Nov 04 20:32:39 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Mon Dec 05 13:28:47 2011 -0500" }, "message": "ftrace: Fix hash record accounting bug\n\nIf the set_ftrace_filter is cleared by writing just whitespace to\nit, then the filter hash refcounts will be decremented but not\nupdated. This causes two bugs:\n\n1) No functions will be enabled for tracing when they all should be\n\n2) If the users clears the set_ftrace_filter twice, it will crash ftrace:\n\n------------[ cut here ]------------\nWARNING: at /home/rostedt/work/git/linux-trace.git/kernel/trace/ftrace.c:1384 __ftrace_hash_rec_update.part.27+0x157/0x1a7()\nModules linked in:\nPid: 2330, comm: bash Not tainted 3.1.0-test+ #32\nCall Trace:\n [\u003cffffffff81051828\u003e] warn_slowpath_common+0x83/0x9b\n [\u003cffffffff8105185a\u003e] warn_slowpath_null+0x1a/0x1c\n [\u003cffffffff810ba362\u003e] __ftrace_hash_rec_update.part.27+0x157/0x1a7\n [\u003cffffffff810ba6e8\u003e] ? ftrace_regex_release+0xa7/0x10f\n [\u003cffffffff8111bdfe\u003e] ? kfree+0xe5/0x115\n [\u003cffffffff810ba51e\u003e] ftrace_hash_move+0x2e/0x151\n [\u003cffffffff810ba6fb\u003e] ftrace_regex_release+0xba/0x10f\n [\u003cffffffff8112e49a\u003e] fput+0xfd/0x1c2\n [\u003cffffffff8112b54c\u003e] filp_close+0x6d/0x78\n [\u003cffffffff8113a92d\u003e] sys_dup3+0x197/0x1c1\n [\u003cffffffff8113a9a6\u003e] sys_dup2+0x4f/0x54\n [\u003cffffffff8150cac2\u003e] system_call_fastpath+0x16/0x1b\n---[ end trace 77a3a7ee73794a02 ]---\n\nLink: http://lkml.kernel.org/r/20111101141420.GA4918@debian\n\nReported-by: Rabin Vincent \u003crabin@rab.in\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "c7c6ec8becaf742b223c7b491f4893014be23a07", "tree": "1eb23e1dd22ef56b298bc2f207d5d4999a0731cf", "parents": [ "27b14b56af081ec7edeefb3a38b2c9577cc5ef48" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Nov 04 10:45:23 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Mon Dec 05 13:28:45 2011 -0500" }, "message": "ftrace: Remove force undef config value left for testing\n\nA forced undef of a config value was used for testing and was\naccidently left in during the final commit. This causes x86 to\nrun slower than needed while running function tracing as well\nas causes the function graph selftest to fail when DYNMAIC_FTRACE\nis not set. This is because the code in MCOUNT expects the ftrace\ncode to be processed with the config value set that happened to\nbe forced not set.\n\nThe forced config option was left in by:\n commit 6331c28c962561aee59e5a493b7556a4bb585957\n ftrace: Fix dynamic selftest failure on some archs\n\nLink: http://lkml.kernel.org/r/20111102150255.GA6973@debian\n\nCc: stable@vger.kernel.org\nReported-by: Rabin Vincent \u003crabin@rab.in\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "27b14b56af081ec7edeefb3a38b2c9577cc5ef48", "tree": "841e01c8d64fdf08b88c8a76de3272b4630ed145", "parents": [ "cb59974742aea24adf6637eb0c4b8e7b48bca6fb" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Nov 01 09:09:35 2011 +0800" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Mon Dec 05 13:28:45 2011 -0500" }, "message": "tracing: Restore system filter behavior\n\nThough not all events have field \u0027prev_pid\u0027, it was allowed to do this:\n\n # echo \u0027prev_pid \u003d\u003d 100\u0027 \u003e events/sched/filter\n\nbut commit 75b8e98263fdb0bfbdeba60d4db463259f1fe8a2 (tracing/filter: Swap\nentire filter of events) broke it without any reason.\n\nLink: http://lkml.kernel.org/r/4EAF46CF.8040408@cn.fujitsu.com\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "cb59974742aea24adf6637eb0c4b8e7b48bca6fb", "tree": "1f891849b3fa24d69c3517c3c3739964ecfb0ac9", "parents": [ "dc440d10e1668b15fe704a23adb9b53fbbb24a44" ], "author": { "name": "Ilya Dryomov", "email": "idryomov@gmail.com", "time": "Mon Oct 31 11:07:42 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Mon Dec 05 13:28:44 2011 -0500" }, "message": "tracing: fix event_subsystem ref counting\n\nFix a bug introduced by e9dbfae5, which prevents event_subsystem from\never being released.\n\nRef_count was added to keep track of subsystem users, not for counting\nevents. Subsystem is created with ref_count \u003d 1, so there is no need to\nincrement it for every event, we have nr_events for that. Fix this by\ntouching ref_count only when we actually have a new user -\nsubsystem_open().\n\nCc: stable@vger.kernel.org\nSigned-off-by: Ilya Dryomov \u003cidryomov@gmail.com\u003e\nLink: http://lkml.kernel.org/r/1320052062-7846-1-git-send-email-idryomov@gmail.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "d3d9acf646679c1981032b0985b386d12fccc60c", "tree": "68df9e100ae7304a1384160b5d1b068241f4d1fe", "parents": [ "4a1dba72384193753e44e15d9d05a50be6587271" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Nov 23 08:49:49 2011 -0800" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Dec 01 22:16:47 2011 -0500" }, "message": "trace_events_filter: Use rcu_assign_pointer() when setting ftrace_event_call-\u003efilter\n\nftrace_event_call-\u003efilter is sched RCU protected but didn\u0027t use\nrcu_assign_pointer(). Use it.\n\nTODO: Add proper __rcu annotation to call-\u003efilter and all its users.\n\n-v2: Use RCU_INIT_POINTER() for %NULL clearing as suggested by Eric.\n\nLink: http://lkml.kernel.org/r/20111123164949.GA29639@google.com\n\nCc: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Jiri Olsa \u003cjolsa@redhat.com\u003e\nCc: stable@kernel.org # (2.6.39+)\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "6e5fdeedca610df600aabc393c4b1f44b128fe49", "tree": "52a34c30bef1501f19c691a759b81b6f2603cd32", "parents": [ "bdfa97bf7263657b83bc5b68567a3a60dde84c5b" ], "author": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Thu May 26 16:00:52 2011 -0400" }, "committer": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Mon Oct 31 19:30:05 2011 -0400" }, "message": "kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure\n\nThese files were getting \u003clinux/module.h\u003e via an implicit non-obvious\npath, but we want to crush those out of existence since they cost\ntime during compiles of processing thousands of lines of headers\nfor no reason. Give them the lightweight header that just contains\nthe EXPORT_SYMBOL infrastructure.\n\nSigned-off-by: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\n" }, { "commit": "56d82e000cdfb51aa92241d4682302f78c35cd92", "tree": "db011bf38930f2d0d0fa8a8f43e223fd03e25fad", "parents": [ "9984de1a5a8a96275fcab818f7419af5a3c86e71" ], "author": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Thu May 26 17:53:52 2011 -0400" }, "committer": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Mon Oct 31 09:20:12 2011 -0400" }, "message": "kernel: Add \u003clinux/module.h\u003e to files using it implicitly\n\nThese files are doing things like module_put and try_module_get\nso they need to call out the module.h for explicit inclusion,\nrather than getting it via \u003clinux/device.h\u003e which we ideally want\nto remove the module.h inclusion from.\n\nSigned-off-by: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\n" }, { "commit": "7115e3fcf45514db7525a05365b10454ff7f345e", "tree": "17450e6337d559cc35dae6a7a73abab01ac63f00", "parents": [ "1f6e05171bb5cc32a4d6437ab2269fc21d169ca7", "c752d04066a36ae30b29795f3fa3f536292c1f8c" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 17:03:38 2011 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 17:03:38 2011 +0200" }, "message": "Merge branch \u0027perf-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027perf-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (121 commits)\n perf symbols: Increase symbol KSYM_NAME_LEN size\n perf hists browser: Refuse \u0027a\u0027 hotkey on non symbolic views\n perf ui browser: Use libslang to read keys\n perf tools: Fix tracing info recording\n perf hists browser: Elide DSO column when it is set to just one DSO, ditto for threads\n perf hists: Don\u0027t consider filtered entries when calculating column widths\n perf hists: Don\u0027t decay total_period for filtered entries\n perf hists browser: Honour symbol_conf.show_{nr_samples,total_period}\n perf hists browser: Do not exit on tab key with single event\n perf annotate browser: Don\u0027t change selection line when returning from callq\n perf tools: handle endianness of feature bitmap\n perf tools: Add prelink suggestion to dso update message\n perf script: Fix unknown feature comment\n perf hists browser: Apply the dso and thread filters when merging new batches\n perf hists: Move the dso and thread filters from hist_browser\n perf ui browser: Honour the xterm colors\n perf top tui: Give color hints just on the percentage, like on --stdio\n perf ui browser: Make the colors configurable and change the defaults\n perf tui: Remove unneeded call to newtCls on startup\n perf hists: Don\u0027t format the percentage on hist_entry__snprintf\n ...\n\nFix up conflicts in arch/x86/kernel/kprobes.c manually.\n\nIngo\u0027s tree did the insane \"add volatile to const array\", which just\ndoesn\u0027t make sense (\"volatile const\"?). But we could remove the const\n*and* make the array volatile to make doubly sure that gcc doesn\u0027t\noptimize it away..\n\nAlso fix up kernel/trace/ring_buffer.c non-data-conflicts manually: the\nreader_lock has been turned into a raw lock by the core locking merge,\nand there was a new user of it introduced in this perf core merge. Make\nsure that new use also uses the raw accessor functions.\n" }, { "commit": "3cfef9524677a4ecb392d6fbffe6ebce6302f1d4", "tree": "88647d9dc50d634dee9cfeb7f354d620977a2f33", "parents": [ "982653009b883ef1529089e3e6f1ae2fee41cbe2", "68cc3990a545dc0da221b4844dd8b9c06623a6c5" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 16:17:32 2011 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 16:17:32 2011 +0200" }, "message": "Merge branch \u0027core-locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027core-locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)\n rtmutex: Add missing rcu_read_unlock() in debug_rt_mutex_print_deadlock()\n lockdep: Comment all warnings\n lib: atomic64: Change the type of local lock to raw_spinlock_t\n locking, lib/atomic64: Annotate atomic64_lock::lock as raw\n locking, x86, iommu: Annotate qi-\u003eq_lock as raw\n locking, x86, iommu: Annotate irq_2_ir_lock as raw\n locking, x86, iommu: Annotate iommu-\u003eregister_lock as raw\n locking, dma, ipu: Annotate bank_lock as raw\n locking, ARM: Annotate low level hw locks as raw\n locking, drivers/dca: Annotate dca_lock as raw\n locking, powerpc: Annotate uic-\u003elock as raw\n locking, x86: mce: Annotate cmci_discover_lock as raw\n locking, ACPI: Annotate c3_lock as raw\n locking, oprofile: Annotate oprofilefs lock as raw\n locking, video: Annotate vga console lock as raw\n locking, latencytop: Annotate latency_lock as raw\n locking, timer_stats: Annotate table_lock as raw\n locking, rwsem: Annotate inner lock as raw\n locking, semaphores: Annotate inner lock as raw\n locking, sched: Annotate thread_group_cputimer as raw\n ...\n\nFix up conflicts in kernel/posix-cpu-timers.c manually: making\ncputimer-\u003ecputime a raw lock conflicted with the ABBA fix in commit\nbcd5cff7216f (\"cputimer: Cure lock inversion\").\n" }, { "commit": "436fc280261dcfce5af38f08b89287750dc91cd2", "tree": "5a57ba115f7f9d19c0185673fa1bfba9dfc292da", "parents": [ "9b5f8b31af57a8ce9e9f77864d9143b5e3304815" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Oct 14 10:44:25 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Oct 14 10:44:25 2011 -0400" }, "message": "tracing: Fix returning of duplicate data after EOF in trace_pipe_raw\n\nThe trace_pipe_raw handler holds a cached page from the time the file\nis opened to the time it is closed. The cached page is used to handle\nthe case of the user space buffer being smaller than what was read from\nthe ring buffer. The left over buffer is held in the cache so that the\nnext read will continue where the data left off.\n\nAfter EOF is returned (no more data in the buffer), the index of\nthe cached page is set to zero. If a user app reads the page again\nafter EOF, the check in the buffer will see that the cached page\nis less than page size and will return the cached page again. This\nwill cause reading the trace_pipe_raw again after EOF to return\nduplicate data, making the output look like the time went backwards\nbut instead data is just repeated.\n\nThe fix is to not reset the index right after all data is read\nfrom the cache, but to reset it after all data is read and more\ndata exists in the ring buffer.\n\nCc: stable \u003cstable@kernel.org\u003e\nReported-by: Jeremy Eder \u003cjeder@redhat.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "9b5f8b31af57a8ce9e9f77864d9143b5e3304815", "tree": "fad2ac950e2b326cec325014016c2135403b3bf2", "parents": [ "910e94dd0cc5abacebf0bd5ffd859f61b9583857" ], "author": { "name": "Geunsik Lim", "email": "geunsik.lim@samsung.com", "time": "Fri Aug 12 14:30:22 2011 +0900" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Oct 14 10:41:33 2011 -0400" }, "message": "ftrace: Fix README to state tracing_on to start/stop tracing\n\ntracing_enabled option is deprecated.\nTo start/stop tracing, write to /sys/kernel/debug/tracing/tracing_on\nwithout tracing_enabled. This patch is based on Linux 3.1.0-rc1\n\nSigned-off-by: Geunsik Lim \u003cgeunsik.lim@samsung.com\u003e\nLink: http://lkml.kernel.org/r/1313127022-23830-1-git-send-email-leemgs1@gmail.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "910e94dd0cc5abacebf0bd5ffd859f61b9583857", "tree": "7cb33f3f89f5fcdaa4dd4f5f19bb946ff495e9ac", "parents": [ "177e2163fe2a5951c1d0531baa4bc1f135c6b7b4", "d696b58ca2c3ca76e784ef89a7e0453d9b7ab187" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Oct 12 17:14:47 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Oct 12 17:14:47 2011 +0200" }, "message": "Merge branch \u0027tip/perf/core\u0027 of git://github.com/rostedt/linux into perf/core\n" }, { "commit": "d696b58ca2c3ca76e784ef89a7e0453d9b7ab187", "tree": "e5f02a13dc8fdec22e9223189122e5938e9ce77e", "parents": [ "e0a413f619ef8bc366dafc6f8221674993b8d85f" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Sep 22 11:50:27 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Oct 11 09:13:53 2011 -0400" }, "message": "tracing: Do not allocate buffer for trace_marker\n\nWhen doing intense tracing, the kmalloc inside trace_marker can\nintroduce side effects to what is being traced.\n\nAs trace_marker() is used by userspace to inject data into the\nkernel ring buffer, it needs to do so with the least amount\nof intrusion to the operations of the kernel or the user space\napplication.\n\nAs the ring buffer is designed to write directly into the buffer\nwithout the need to make a temporary buffer, and userspace already\nwent through the hassle of knowing how big the write will be,\nwe can simply pin the userspace pages and write the data directly\ninto the buffer. This improves the impact of tracing via trace_marker\ntremendously!\n\nThanks to Peter Zijlstra and Thomas Gleixner for pointing out the\nuse of get_user_pages_fast() and kmap_atomic().\n\nSuggested-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSuggested-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "e0a413f619ef8bc366dafc6f8221674993b8d85f", "tree": "a6696b0e7ef5422490bdbcc28d385c031d3e4eb8", "parents": [ "e36de1de4a5f95b7cb3e5c37d10e6bbb91833ef0" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Sep 29 21:26:16 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Oct 11 09:13:25 2011 -0400" }, "message": "tracing: Warn on output if the function tracer was found corrupted\n\nAs the function tracer is very intrusive, lots of self checks are\nperformed on the tracer and if something is found to be strange\nit will shut itself down keeping it from corrupting the rest of the\nkernel. This shutdown may still allow functions to be traced, as the\ntracing only stops new modifications from happening. Trying to stop\nthe function tracer itself can cause more harm as it requires code\nmodification.\n\nAlthough a WARN_ON() is executed, a user may not notice it. To help\nthe user see that something isn\u0027t right with the tracing of the system\na big warning is added to the output of the tracer that lets the user\nknow that their data may be incomplete.\n\nReported-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "02ca1521ad404cf566e0075848f80d064c0a0503", "tree": "11989ae5bfc1e32f355cc0bb0a64cb7ae801ed78", "parents": [ "9d3ec7a0c41d010153c9d20577cb1bcf9c4f65df" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Tue Oct 04 19:44:38 2011 +0900" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Mon Oct 10 15:13:03 2011 -0400" }, "message": "ftrace/kprobes: Fix not to delete probes if in use\n\nFix kprobe-tracer not to delete a probe if the probe is in use.\nIn that case, delete operation will return -EBUSY.\n\nThis bug can cause a kernel panic if enabled probes are deleted\nduring perf record.\n\n(Add some probes on functions)\nsh-4.2# perf probe --del probe:\\*\nsh-4.2# exit\n(kernel panic)\n\nThis is originally reported on the fedora bugzilla:\n\n https://bugzilla.redhat.com/show_bug.cgi?id\u003d742383\n\nI\u0027ve also checked that this problem doesn\u0027t happen on\ntracepoints when module removing because perf event\nlocks target module.\n\n$ sudo ./perf record -e xfs:\\* -aR sh\nsh-4.2# rmmod xfs\nERROR: Module xfs is in use\nsh-4.2# exit\n[ perf record: Woken up 1 times to write data ]\n[ perf record: Captured and wrote 0.203 MB perf.data (~8862 samples) ]\n\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Frank Ch. Eigler \u003cfche@redhat.com\u003e\nCc: stable@kernel.org\nLink: http://lkml.kernel.org/r/20111004104438.14591.6553.stgit@fedora15\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "d727b60659a1173eb4142a5fc521ce67c28b34e1", "tree": "793d0fc86ecf98331024db5c86bc271cc72aa2d2", "parents": [ "3ee72ca99288f1de95ec9c570e43f531c8799f06", "2a5306cc5f383b0e7414c75e458111afd4a563a4" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Oct 07 23:16:55 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Fri Oct 07 23:16:55 2011 +0200" }, "message": "Merge branch \u0027pm-runtime\u0027 into pm-for-linus\n\n* pm-runtime:\n PM / Tracing: build rpm-traces.c only if CONFIG_PM_RUNTIME is set\n PM / Runtime: Replace dev_dbg() with trace_rpm_*()\n PM / Runtime: Introduce trace points for tracing rpm_* functions\n PM / Runtime: Don\u0027t run callbacks under lock for power.irq_safe set\n USB: Add wakeup info to debugging messages\n PM / Runtime: pm_runtime_idle() can be called in atomic context\n PM / Runtime: Add macro to test for runtime PM events\n PM / Runtime: Add might_sleep() to runtime PM functions\n" }, { "commit": "2a5306cc5f383b0e7414c75e458111afd4a563a4", "tree": "0725cb2cf142f1bb52eb93cf0cce77f3798b2f72", "parents": [ "c3dc2f14622a06488f11452b6efd1e02c5a8548b" ], "author": { "name": "Ming Lei", "email": "ming.lei@canonical.com", "time": "Thu Sep 29 22:07:23 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Thu Sep 29 22:07:23 2011 +0200" }, "message": "PM / Tracing: build rpm-traces.c only if CONFIG_PM_RUNTIME is set\n\nDo not build kernel/trace/rpm-traces.c if CONFIG_PM_RUNTIME is not\nset, which avoids a build failure.\n\n[rjw: Added the changelog and modified the subject slightly.]\n\nSigned-off-by: Ming Lei \u003cming.lei@canonical.com\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\n" }, { "commit": "53b615ccca567ada1931eb04ad0614ac150c14a3", "tree": "f09512d0dabaeff71b9ee66c26ca02cae2947873", "parents": [ "ad3c36a534bc7b945d7bffdda1c62e13bf93489a" ], "author": { "name": "Ming Lei", "email": "ming.lei@canonical.com", "time": "Tue Sep 27 22:53:27 2011 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Tue Sep 27 22:53:27 2011 +0200" }, "message": "PM / Runtime: Introduce trace points for tracing rpm_* functions\n\nThis patch introduces 3 trace points to prepare for tracing\nrpm_idle/rpm_suspend/rpm_resume functions, so we can use these\ntrace points to replace the current dev_dbg().\n\nSigned-off-by: Ming Lei \u003cming.lei@canonical.com\u003e\nAcked-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\n" }, { "commit": "e36de1de4a5f95b7cb3e5c37d10e6bbb91833ef0", "tree": "69eab1dc497ec8cb25dfbe6bd98da7656a50c878", "parents": [ "6249687f76b69cc0b2ad34636f4a18d693ef3262" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Sep 22 11:11:51 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Sep 22 11:11:51 2011 -0400" }, "message": "tracing: Fix preemptirqsoff tracer to not stop at preempt off\n\nIf irqs are disabled when preemption count reaches zero, the\npreemptirqsoff tracer should not flag that as the end.\n\nWhen interrupts are enabled and preemption count is not zero\nthe preemptirqsoff correctly continues its tracing.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "6249687f76b69cc0b2ad34636f4a18d693ef3262", "tree": "9c007b85738eb86f113a9a6de1e35129532e5f54", "parents": [ "c64e148a3be3cb786534ad38298c25c833116c26" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon Sep 19 11:35:58 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Mon Sep 19 11:35:58 2011 -0400" }, "message": "tracing: Add a counter clock for those that do not trust clocks\n\nWhen debugging tight race conditions, it can be helpful to have a\nsynchronized tracing method. Although in most cases the global clock\nprovides this functionality, if timings is not the issue, it is more\ncomforting to know that the order of events really happened in a precise\norder.\n\nInstead of using a clock, add a \"counter\" that is simply an incrementing\natomic 64bit counter that orders the events as they are perceived to\nhappen.\n\nThe trace_clock_counter() is added from the attempt by Peter Zijlstra\ntrying to convert the trace_clock_global() to it. I took Peter\u0027s counter\ncode and made trace_clock_counter() instead, and added it to the choice\nof clocks. Just echo counter \u003e /debug/tracing/trace_clock to activate\nit.\n\nRequested-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nRequested-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nReviewed-By: Valdis Kletnieks \u003cvaldis.kletnieks@vt.edu\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "5389f6fad27019f2ba78f1b332f719ec05f12a42", "tree": "01b9511a75c147808f48a7f4408bf2e35b12623d", "parents": [ "740969f91e950b64a18fdd0a25164cdee042abf0" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Sat Jul 25 17:13:33 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Sep 13 11:11:52 2011 +0200" }, "message": "locking, tracing: Annotate tracing locks as raw\n\nThe tracing locks can be taken in atomic context and therefore\ncannot be preempted on -rt - annotate it.\n\nIn mainline this change documents the low level nature of\nthe lock - otherwise there\u0027s no functional difference. Lockdep\nand Sparse checking will work as usual.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "c64e148a3be3cb786534ad38298c25c833116c26", "tree": "e75fb98c0699858a32f8c713ccb3c701e01523f8", "parents": [ "f81ab074c30234b07c8309c542cafd07bed721f7" ], "author": { "name": "Vaibhav Nagarnaik", "email": "vnagarnaik@google.com", "time": "Tue Aug 16 14:46:16 2011 -0700" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Aug 30 12:27:45 2011 -0400" }, "message": "trace: Add ring buffer stats to measure rate of events\n\nThe stats file under per_cpu folder provides the number of entries,\noverruns and other statistics about the CPU ring buffer. However, the\nnumbers do not provide any indication of how full the ring buffer is in\nbytes compared to the overall size in bytes. Also, it is helpful to know\nthe rate at which the cpu buffer is filling up.\n\nThis patch adds an entry \"bytes: \" in printed stats for per_cpu ring\nbuffer which provides the actual bytes consumed in the ring buffer. This\nfield includes the number of bytes used by recorded events and the\npadding bytes added when moving the tail pointer to next page.\n\nIt also adds the following time stamps:\n\"oldest event ts:\" - the oldest timestamp in the ring buffer\n\"now ts:\" - the timestamp at the time of reading\n\nThe field \"now ts\" provides a consistent time snapshot to the userspace\nwhen being read. This is read from the same trace clock used by tracing\nevent timestamps.\n\nTogether, these values provide the rate at which the buffer is filling\nup, from the formula:\nbytes / (now_ts - oldest_event_ts)\n\nSigned-off-by: Vaibhav Nagarnaik \u003cvnagarnaik@google.com\u003e\nCc: Michael Rubin \u003cmrubin@google.com\u003e\nCc: David Sharp \u003cdhsharp@google.com\u003e\nLink: http://lkml.kernel.org/r/1313531179-9323-3-git-send-email-vnagarnaik@google.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "f81ab074c30234b07c8309c542cafd07bed721f7", "tree": "58ec049e4f63d0f8a0b696195cf77da2b6d04b01", "parents": [ "86b6ef21b80ac6565d172cdab4384404de007eea" ], "author": { "name": "Vaibhav Nagarnaik", "email": "vnagarnaik@google.com", "time": "Tue Aug 16 14:46:15 2011 -0700" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Aug 30 12:27:44 2011 -0400" }, "message": "trace: Add a new readonly entry to report total buffer size\n\nThe current file \"buffer_size_kb\" reports the size of per-cpu buffer and\nnot the overall memory allocated which could be misleading. A new file\n\"buffer_total_size_kb\" adds up all the enabled CPU buffer sizes and\nreports it. This is only a readonly entry.\n\nSigned-off-by: Vaibhav Nagarnaik \u003cvnagarnaik@google.com\u003e\nCc: Michael Rubin \u003cmrubin@google.com\u003e\nCc: David Sharp \u003cdhsharp@google.com\u003e\nLink: http://lkml.kernel.org/r/1313531179-9323-2-git-send-email-vnagarnaik@google.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "86b6ef21b80ac6565d172cdab4384404de007eea", "tree": "5156d0d78b4cb0fbbd58ce2281c19f9bba6864f6", "parents": [ "1d0e78e380cd2802aa603a50e08220dfc681141c" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon Aug 22 09:41:46 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Aug 30 12:27:07 2011 -0400" }, "message": "tracing: Add preempt disable for filter self test\n\nThe self testing for event filters does not really need preemption\ndisabled as there are no races at the time of testing, but the functions\nit calls uses rcu_dereference_sched() which will complain if preemption\nis not disabled.\n\nCc: Jiri Olsa \u003cjolsa@redhat.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "1d0e78e380cd2802aa603a50e08220dfc681141c", "tree": "909fd3f4d39ca719f29eb6f5690ba171528c4399", "parents": [ "f30120fce1efaa426f340a354d5ace36dab59f0e" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:54 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:59 2011 -0400" }, "message": "tracing/filter: Add startup tests for events filter\n\nAdding automated tests running as late_initcall. Tests are\ncompiled in with CONFIG_FTRACE_STARTUP_TEST option.\n\nAdding test event \"ftrace_test_filter\" used to simulate\nfilter processing during event occurance.\n\nString filters are compiled and tested against several\ntest events with different values.\n\nAlso testing that evaluation of explicit predicates is ommited\ndue to the lazy filter evaluation.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-11-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "f30120fce1efaa426f340a354d5ace36dab59f0e", "tree": "03a819877897ec8f40f0f889a8cd3659ba056926", "parents": [ "96bc293a97e7f1651977976be7dd42031f6d8ea3" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:53 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:58 2011 -0400" }, "message": "tracing/filter: Change filter_match_preds function to use walk_pred_tree\n\nChanging filter_match_preds function to use unified predicates tree\nprocessing.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-10-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "96bc293a97e7f1651977976be7dd42031f6d8ea3", "tree": "e243a1c53c24835574085426ee3b9021a1c15360", "parents": [ "1b797fe5aaac11e60fce1592119d0517e95aba95" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:52 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:57 2011 -0400" }, "message": "tracing/filter: Change fold_pred function to use walk_pred_tree\n\nChanging fold_pred_tree function to use unified predicates tree\nprocessing.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-9-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "1b797fe5aaac11e60fce1592119d0517e95aba95", "tree": "276dd2cfff0e2ec8a62c2f63662f55e52822aa1f", "parents": [ "c00b060f36e1238816ebcf2c8cccd5e9fa068980" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:51 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:56 2011 -0400" }, "message": "tracing/filter: Change fold_pred_tree function to use walk_pred_tree\n\nChanging fold_pred_tree function to use unified predicates tree\nprocessing.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-8-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "c00b060f36e1238816ebcf2c8cccd5e9fa068980", "tree": "cd9762a0c956d80edd556001178bd5426106d81e", "parents": [ "f03f5979945c573801c25ba3089ef17c4d7edc61" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:50 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:55 2011 -0400" }, "message": "tracing/filter: Change count_leafs function to use walk_pred_tree\n\nChanging count_leafs function to use unified predicates tree\nprocessing.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-7-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "f03f5979945c573801c25ba3089ef17c4d7edc61", "tree": "d26c45bd4c7fd26e2a635bf08612a1e09d8038c5", "parents": [ "3f78f935e7fec3067b7990f9e4d324e1de70f79c" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:49 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:54 2011 -0400" }, "message": "tracing/filter: Unify predicate tree walking, change check_pred_tree function to use it\n\nAdding walk_pred_tree function to be used for walking throught\nthe filter predicates.\n\nFor each predicate the callback function is called, allowing\nusers to add their own functionality or customize their way\nthrough the filter predicates.\n\nChanging check_pred_tree function to use walk_pred_tree.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-6-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "3f78f935e7fec3067b7990f9e4d324e1de70f79c", "tree": "a8152f5be2e5fb72b51baf872bd36ffa1d9d4dcf", "parents": [ "61aaef55300088e12d7f853adeea65d1aa1562db" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:48 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:53 2011 -0400" }, "message": "tracing/filter: Simplify tracepoint event lookup\n\nWe dont need to perform lookup through the ftrace_events list,\ninstead we can use the \u0027tp_event\u0027 field.\n\nEach perf_event contains tracepoint event field \u0027tp_event\u0027, which\ngot initialized during the tracepoint event initialization.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-5-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "61aaef55300088e12d7f853adeea65d1aa1562db", "tree": "2f902bf96330b9727ec3d82b9ff92b83cb79636c", "parents": [ "9d96cd1743547f07a8a6c51a3f7741cfca0a0bee" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:47 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:52 2011 -0400" }, "message": "tracing/filter: Remove field_name from filter_pred struct\n\nThe field_name was used just for finding event\u0027s fields. This way we\ndon\u0027t need to care about field_name allocation/free.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-4-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "9d96cd1743547f07a8a6c51a3f7741cfca0a0bee", "tree": "b013bf238a63661eccb7134b0e9631ff09464a47", "parents": [ "81570d9caaad46a056580c9af078c5c55e6c764f" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:46 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:51 2011 -0400" }, "message": "tracing/filter: Separate predicate init and filter addition\n\nMaking the code cleaner by having one function to fully prepare\nthe predicate (create_pred), and another to add the predicate to\nthe filter (filter_add_pred).\n\nAs a benefit, this way the dry_run flag stays only inside the\nreplace_preds function and is not passed deeper.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-3-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "81570d9caaad46a056580c9af078c5c55e6c764f", "tree": "7a0684a47659215b5714c4de64e5147c5be1c2a4", "parents": [ "2f3aa7a06f6f48d6f78a90595b17e6beafa7abf6" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Thu Aug 11 16:25:45 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Aug 19 14:35:51 2011 -0400" }, "message": "tracing/filter: Use static allocation for filter predicates\n\nDon\u0027t dynamically allocate filter_pred struct, use static memory.\nThis way we can get rid of the code managing the dynamic filter_pred\nstruct object.\n\nThe create_pred function integrates create_logical_pred function.\nThis way the static predicate memory is returned only from\none place.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1313072754-4620-2-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "5ccc38740a283aba81a00e92941310d0c1aeb2ee", "tree": "ba7d725947975a9391e085bd1d5958b004bfdc3e", "parents": [ "0c3bef612881ee6216a36952ffaabfc35b83545c", "b53d1ed734a2b9af8da115b836b658daa7d47a48" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Aug 19 10:47:07 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Aug 19 10:47:07 2011 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.dk/linux-block\n\n* \u0027for-linus\u0027 of git://git.kernel.dk/linux-block: (23 commits)\n Revert \"cfq: Remove special treatment for metadata rqs.\"\n block: fix flush machinery for stacking drivers with differring flush flags\n block: improve rq_affinity placement\n blktrace: add FLUSH/FUA support\n Move some REQ flags to the common bio/request area\n allow blk_flush_policy to return REQ_FSEQ_DATA independent of *FLUSH\n xen/blkback: Make description more obvious.\n cfq-iosched: Add documentation about idling\n block: Make rq_affinity \u003d 1 work as expected\n block: swim3: fix unterminated of_device_id table\n block/genhd.c: remove useless cast in diskstats_show()\n drivers/cdrom/cdrom.c: relax check on dvd manufacturer value\n drivers/block/drbd/drbd_nl.c: use bitmap_parse instead of __bitmap_parse\n bsg-lib: add module.h include\n cfq-iosched: Reduce linked group count upon group destruction\n blk-throttle: correctly determine sync bio\n loop: fix deadlock when sysfs and LOOP_CLR_FD race against each other\n loop: add BLK_DEV_LOOP_MIN_COUNT\u003d%i to allow distros 0 pre-allocated loop devices\n loop: add management interface for on-demand device allocation\n loop: replace linked list of allocated devices with an idr index\n ...\n" }, { "commit": "c09c47caedc9854d59378d6e34c989e51cfdd2b4", "tree": "ad7de20c08092cdf1cbbb83625a76acab3b0e2ce", "parents": [ "8e4bf84474960e832b56293c9b0674c88b5b05ce" ], "author": { "name": "Namhyung Kim", "email": "namhyung@gmail.com", "time": "Thu Aug 11 10:36:05 2011 +0200" }, "committer": { "name": "Jens Axboe", "email": "jaxboe@fusionio.com", "time": "Thu Aug 11 10:36:05 2011 +0200" }, "message": "blktrace: add FLUSH/FUA support\n\nAdd FLUSH/FUA support to blktrace. As FLUSH precedes WRITE and/or\nFUA follows WRITE, use the same \u0027F\u0027 flag for both cases and\ndistinguish them by their (relative) position. The end results\nlook like (other flags might be shown also):\n\n - WRITE: W\n - WRITE_FLUSH: FW\n - WRITE_FUA: WF\n - WRITE_FLUSH_FUA: FWF\n\nNote that we reuse TC_BARRIER due to lack of bit space of act_mask\nso that the older versions of blktrace tools will report flush\nrequests as barriers from now on.\n\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nSigned-off-by: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nReviewed-by: Jeff Moyer \u003cjmoyer@redhat.com\u003e\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n" }, { "commit": "3a301d7c1c68fd96bbcf82db82d9508918e0dc22", "tree": "c1fc544070e5b85bbdabe7a0bdd4b5859378e7a3", "parents": [ "322a8b034003c0d46d39af85bf24fee27b902f48" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon Aug 08 21:39:39 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed Aug 10 20:36:32 2011 -0400" }, "message": "tracing: Clean up tb_fmt to not give faulty compile warning\n\ngcc incorrectly states that the variable \"fmt\" is uninitialized when\nCC_OPITMIZE_FOR_SIZE is set.\n\nInstead of just blindly setting fmt to NULL, the code is cleaned up\na little to be a bit easier for humans to follow, as well as gcc\nto know the variables are initialized.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "3272cab4063467410802367a8d69f06c65b2a866", "tree": "1c665f8572b0aab2a5343d32b5eaa6713669b04f", "parents": [ "f629299b544b6cc12b4e3e85fec96f4ce5809482", "140d0b2108faebc77c6523296e211e509cb9f5f9" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Aug 05 10:32:54 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Aug 05 10:33:55 2011 +0200" }, "message": "Merge branch \u0027linus\u0027 into perf/urgent\n\nMerge reason: Include most of the merge window trees, to do fixes on top.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "60063497a95e716c9a689af3be2687d261f115b4", "tree": "6ce0d68db76982c53df46aee5f29f944ebf2c320", "parents": [ "148817ba092f9f6edd35bad3c6c6b8e8f90fe2ed" ], "author": { "name": "Arun Sharma", "email": "asharma@fb.com", "time": "Tue Jul 26 16:09:06 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 26 16:49:47 2011 -0700" }, "message": "atomic: use \u003clinux/atomic.h\u003e\n\nThis allows us to move duplicated code in \u003casm/atomic.h\u003e\n(atomic_inc_not_zero() for now) to \u003clinux/atomic.h\u003e\n\nSigned-off-by: Arun Sharma \u003casharma@fb.com\u003e\nReviewed-by: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nAcked-by: Mike Frysinger \u003cvapier@gentoo.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f629299b544b6cc12b4e3e85fec96f4ce5809482", "tree": "b803333c4780dab5ca2badefc00043ff32da8f2f", "parents": [ "08a4a43fc407d780bdde36d98f89c0dbb2a6be6b" ], "author": { "name": "Jesper Juhl", "email": "jj@chaosbits.net", "time": "Sun Jul 24 23:15:42 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 25 09:37:21 2011 +0200" }, "message": "trace events: Update version number reference to new 3.x scheme for EVENT_POWER_TRACING_DEPRECATED\n\nWhat was scheduled to be 2.6.41 is now going to be 3.1 .\n\nSigned-off-by: Jesper Juhl \u003cjj@chaosbits.net\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nLink: http://lkml.kernel.org/r/alpine.LNX.2.00.1107250929370.8080@swampdragon.chaosbits.net\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "40bcea7bbe8fe452a2d272e2ffd3dea281eec9ff", "tree": "aedb6d02e53e3cf84cc32fd81db84032cee205e1", "parents": [ "492f73a303b488ffd67097b2351d54aa6e6c7c73", "14a8fd7ceea6915c613746203d6e9a2bf273f16c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jul 21 09:32:40 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jul 21 09:32:40 2011 +0200" }, "message": "Merge branch \u0027tip/perf/core\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core\n" }, { "commit": "492f73a303b488ffd67097b2351d54aa6e6c7c73", "tree": "6e6c16fbd628bb5eb577cfc70a488ca286563e58", "parents": [ "e08fbb78f03fe2c4f88824faf6f51ce6af185e11", "f7bc8b61f65726ff98f52e286b28e294499d7a08" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jul 21 09:29:14 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jul 21 09:29:21 2011 +0200" }, "message": "Merge branch \u0027perf/urgent\u0027 into perf/core\n\nMerge reason: pick up the latest fixes - they won\u0027t make v3.0.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "7f6878a3d707b947603e09d95df0c3a98987e3a4", "tree": "aa707653884ae1a7eac99c1b3c772c2eb89eb642", "parents": [ "614243181050436785f5a621749a7da2336a7916" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Mon Jun 27 16:27:03 2011 +0900" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Jul 15 15:45:32 2011 -0400" }, "message": "tracing/kprobe: Update symbol reference when loading module\n\nSince the address of a module-local variable can only be\nsolved after the target module is loaded, the symbol\nfetch-argument should be updated when loading target\nmodule.\n\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nLink: http://lkml.kernel.org/r/20110627072703.6528.75042.stgit@fedora15\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "614243181050436785f5a621749a7da2336a7916", "tree": "d64445cc0bc14420b993e82bd4bb4723ea8e34fa", "parents": [ "bc81d48d13d8839fae6833c95794c403b2133f36" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Mon Jun 27 16:26:56 2011 +0900" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Jul 15 15:17:14 2011 -0400" }, "message": "tracing/kprobes: Support module init function probing\n\nTo support probing module init functions, kprobe-tracer allows\nuser to define a probe on non-existed function when it is given\nwith a module name. This also enables user to set a probe on\na function on a specific module, even if a same name (but different)\nfunction is locally defined in another module.\n\nThe module name must be in the front of function name and separated\nby a \u0027:\u0027. e.g. btrfs:btrfs_init_sysfs\n\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nLink: http://lkml.kernel.org/r/20110627072656.6528.89970.stgit@fedora15\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "1538f888f1e793de04e0f90372352ac1b05833cf", "tree": "42c064993df39faf3f285e276f588fc2518016f2", "parents": [ "7143f168e2aa4bc7f8a8bcfe46d8dc52f7be869a" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Mon Jun 27 16:26:44 2011 +0900" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Jul 15 15:10:58 2011 -0400" }, "message": "tracing/kprobes: Merge trace probe enable/disable functions\n\nMerge redundant enable/disable functions into enable_trace_probe()\nand disable_trace_probe().\n\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: yrl.pp-manager.tt@hitachi.com\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nLink: http://lkml.kernel.org/r/20110627072644.6528.26910.stgit@fedora15\n\n[ converted kprobe selftest to use enable_trace_probe ]\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "f7bc8b61f65726ff98f52e286b28e294499d7a08", "tree": "88ef0c943d27aa9f69824d87faa990731cc2ebfe", "parents": [ "04da85b86188f224cc9b391b5bdd92a3ba20ffcf" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Jul 14 23:02:27 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jul 14 23:02:27 2011 -0400" }, "message": "ftrace: Fix regression where ftrace breaks when modules are loaded\n\nEnabling function tracer to trace all functions, then load a module and\nthen disable function tracing will cause ftrace to fail.\n\nThis can also happen by enabling function tracing on the command line:\n\n ftrace\u003dfunction\n\nand during boot up, modules are loaded, then you disable function tracing\nwith \u0027echo nop \u003e current_tracer\u0027 you will trigger a bug in ftrace that\nwill shut itself down.\n\nThe reason is, the new ftrace code keeps ref counts of all ftrace_ops that\nare registered for tracing. When one or more ftrace_ops are registered,\nall the records that represent the functions that the ftrace_ops will\ntrace have a ref count incremented. If this ref count is not zero,\nwhen the code modification runs, that function will be enabled for tracing.\nIf the ref count is zero, that function will be disabled from tracing.\n\nTo make sure the accounting was working, FTRACE_WARN_ON()s were added\nto updating of the ref counts.\n\nIf the ref count hits its max (\u003e 2^30 ftrace_ops added), or if\nthe ref count goes below zero, a FTRACE_WARN_ON() is triggered which\ndisables all modification of code.\n\nSince it is common for ftrace_ops to trace all functions in the kernel,\ninstead of creating \u003e 20,000 hash items for the ftrace_ops, the hash\ncount is just set to zero, and it represents that the ftrace_ops is\nto trace all functions. This is where the issues arrise.\n\nIf you enable function tracing to trace all functions, and then add\na module, the modules function records do not get the ref count updated.\nWhen the function tracer is disabled, all function records ref counts\nare subtracted. Since the modules never had their ref counts incremented,\nthey go below zero and the FTRACE_WARN_ON() is triggered.\n\nThe solution to this is rather simple. When modules are loaded, and\ntheir functions are added to the the ftrace pool, look to see if any\nftrace_ops are registered that trace all functions. And for those,\nupdate the ref count for the module function records.\n\nReported-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "7143f168e2aa4bc7f8a8bcfe46d8dc52f7be869a", "tree": "cd13a0d2524b9ef4c6f807d01912147539c924b8", "parents": [ "f91298709790b9a483752ca3c967845537df2af3" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Mon Jun 27 16:26:36 2011 +0900" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jul 14 17:44:43 2011 -0400" }, "message": "tracing/kprobes: Rename probe_* to trace_probe_*\n\nRename probe_* to trace_probe_* for avoiding namespace\nconfliction. This also fixes improper names of find_probe_event()\nand cleanup_all_probes() to find_trace_probe() and\nrelease_all_trace_probes() respectively.\n\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nLink: http://lkml.kernel.org/r/20110627072636.6528.60374.stgit@fedora15\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "4a9bd3f134decd6d16ead8d288342d57aad486be", "tree": "ca9eca5fcbe93dc8a433d839221505ad8fba5296", "parents": [ "259032bfe379281bf7cba512b7705bdb4ce41db5" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Jul 14 16:36:53 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jul 14 16:36:53 2011 -0400" }, "message": "tracing: Have dynamic size event stack traces\n\nCurrently the stack trace per event in ftace is only 8 frames.\nThis can be quite limiting and sometimes useless. Especially when\nthe \"ignore frames\" is wrong and we also use up stack frames for\nthe event processing itself.\n\nChange this to be dynamic by adding a percpu buffer that we can\nwrite a large stack frame into and then copy into the ring buffer.\n\nFor interrupts and NMIs that come in while another event is being\nprocess, will only get to use the 8 frame stack. That should be enough\nas the task that it interrupted will have the full stack frame anyway.\n\nRequested-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "6331c28c962561aee59e5a493b7556a4bb585957", "tree": "33292a3127aa831ee8ec2394e790bc2a8817beee", "parents": [ "072126f4529196f71a97960248bca54fd4554c2d" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Wed Jul 13 15:11:02 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed Jul 13 22:25:09 2011 -0400" }, "message": "ftrace: Fix dynamic selftest failure on some archs\n\nArchs that do not implement CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST, will\nfail the dynamic ftrace selftest.\n\nThe function tracer has a quick \u0027off\u0027 variable that will prevent\nthe call back functions from being called. This variable is called\nfunction_trace_stop. In x86, this is implemented directly in the mcount\nassembly, but for other archs, an intermediate function is used called\nftrace_test_stop_func().\n\nIn dynamic ftrace, the function pointer variable ftrace_trace_function is\nused to update the caller code in the mcount caller. But for archs that\ndo not have CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST set, it only calls\nftrace_test_stop_func() instead, which in turn calls __ftrace_trace_function.\n\nWhen more than one ftrace_ops is registered, the function it calls is\nftrace_ops_list_func(), which will iterate over all registered ftrace_ops\nand call the callbacks that have their hash matching.\n\nThe issue happens when two ftrace_ops are registered for different functions\nand one is then unregistered. The __ftrace_trace_function is then pointed\nto the remaining ftrace_ops callback function directly. This mean it will\nbe called for all functions that were registered to trace by both ftrace_ops\nthat were registered.\n\nThis is not an issue for archs with CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST,\nbecause the update of ftrace_trace_function doesn\u0027t happen until after all\nfunctions have been updated, and then the mcount caller is updated. But\nfor those archs that do use the ftrace_test_stop_func(), the update is\nimmediate.\n\nThe dynamic selftest fails because it hits this situation, and the\nftrace_ops that it registers fails to only trace what it was suppose to\nand instead traces all other functions.\n\nThe solution is to delay the setting of __ftrace_trace_function until\nafter all the functions have been updated according to the registered\nftrace_ops. Also, function_trace_stop is set during the update to prevent\nfunction tracing from calling code that is caused by the function tracer\nitself.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "072126f4529196f71a97960248bca54fd4554c2d", "tree": "cb1275288f49b59e4643abb85855ad6889aba94f", "parents": [ "41fb61c2d08107ce96a5dcb3a6289b2afd3e135c" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Wed Jul 13 15:08:31 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed Jul 13 22:10:05 2011 -0400" }, "message": "ftrace: Update filter when tracing enabled in set_ftrace_filter()\n\nCurrently, if set_ftrace_filter() is called when the ftrace_ops is\nactive, the function filters will not be updated. They will only be updated\nwhen tracing is disabled and re-enabled.\n\nUpdate the functions immediately during set_ftrace_filter().\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "41fb61c2d08107ce96a5dcb3a6289b2afd3e135c", "tree": "ca3ae1796ca1d3f01f2bb62eba1fbc93db1affae", "parents": [ "4376cac66778b25e599be3f5d54f33f58ba8ead7" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Wed Jul 13 15:03:44 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed Jul 13 22:00:50 2011 -0400" }, "message": "ftrace: Balance records when updating the hash\n\nWhenever the hash of the ftrace_ops is updated, the record counts\nmust be balance. This requires disabling the records that are set\nin the original hash, and then enabling the records that are set\nin the updated hash.\n\nMoving the update into ftrace_hash_move() removes the bug where the\nhash was updated but the records were not, which results in ftrace\ntriggering a warning and disabling itself because the ftrace_ops filter\nis updated while the ftrace_ops was registered, and then the failure\nhappens when the ftrace_ops is unregistered.\n\nThe current code will not trigger this bug, but new code will.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "4376cac66778b25e599be3f5d54f33f58ba8ead7", "tree": "9cf05820586f140bafcde67cd2cd80a4391ef7eb", "parents": [ "e4a3f541f0b67fdad98b326c851dfe7f4b6b6dad" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Jun 24 23:28:13 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jul 07 22:39:38 2011 -0400" }, "message": "ftrace: Do not disable interrupts for modules in mcount update\n\nWhen I mounted an NFS directory, it caused several modules to be loaded. At the\ntime I was running the preemptirqsoff tracer, and it showed the following\noutput:\n\n# tracer: preemptirqsoff\n#\n# preemptirqsoff latency trace v1.1.5 on 2.6.33.9-rt30-mrg-test\n# --------------------------------------------------------------------\n# latency: 1177 us, #4/4, CPU#3 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:4)\n# -----------------\n# | task: modprobe-19370 (uid:0 nice:0 policy:0 rt_prio:0)\n# -----------------\n# \u003d\u003e started at: ftrace_module_notify\n# \u003d\u003e ended at: ftrace_module_notify\n#\n#\n# _------\u003d\u003e CPU#\n# / _-----\u003d\u003e irqs-off\n# | / _----\u003d\u003e need-resched\n# || / _---\u003d\u003e hardirq/softirq\n# ||| / _--\u003d\u003e preempt-depth\n# |||| /_--\u003d\u003e lock-depth\n# |||||/ delay\n# cmd pid |||||| time | caller\n# \\ / |||||| \\ | /\nmodprobe-19370 3d.... 0us!: ftrace_process_locs \u003c-ftrace_module_notify\nmodprobe-19370 3d.... 1176us : ftrace_process_locs \u003c-ftrace_module_notify\nmodprobe-19370 3d.... 1178us : trace_hardirqs_on \u003c-ftrace_module_notify\nmodprobe-19370 3d.... 1178us : \u003cstack trace\u003e\n \u003d\u003e ftrace_process_locs\n \u003d\u003e ftrace_module_notify\n \u003d\u003e notifier_call_chain\n \u003d\u003e __blocking_notifier_call_chain\n \u003d\u003e blocking_notifier_call_chain\n \u003d\u003e sys_init_module\n \u003d\u003e system_call_fastpath\n\nThat\u0027s over 1ms that interrupts are disabled on a Real-Time kernel!\n\nLooking at the cause (being the ftrace author helped), I found that the\ninterrupts are disabled before the code modification of mcounts into nops. The\ninterrupts only need to be disabled on start up around this code, not when\nmodules are being loaded.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "e4a3f541f0b67fdad98b326c851dfe7f4b6b6dad", "tree": "e93b858ab3313374d23c4ebadc5077816f1894f2", "parents": [ "e08fbb78f03fe2c4f88824faf6f51ce6af185e11" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Jun 14 19:02:29 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jul 07 22:26:27 2011 -0400" }, "message": "tracing: Still trace filtered irq functions when irq trace is disabled\n\nIf a function is set to be traced by the set_graph_function, but the\noption funcgraph-irqs is zero, and the traced function happens to be\ncalled from a interrupt, it will not be traced.\n\nThe point of funcgraph-irqs is to not trace interrupts when we are\npreempted by an irq, not to not trace functions we want to trace that\nhappen to be *in* a irq.\n\nLuckily the current-\u003etrace_recursion element is perfect to add a flag\nto help us be able to trace functions within an interrupt even when\nwe are not tracing interrupts that preempt the trace.\n\nReported-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nTested-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "43dd61c9a09bd413e837df829e6bfb42159be52a", "tree": "613b8ceaf798c87a4fac4ff66dc2ac0e13c3e46b", "parents": [ "40ee4dffff061399eb9358e0c8fcfbaf8de4c8fe" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Jul 07 11:09:22 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jul 07 11:30:08 2011 -0400" }, "message": "ftrace: Fix regression of :mod:module function enabling\n\nThe new code that allows different utilities to pick and choose\nwhat functions they trace broke the :mod: hook that allows users\nto trace only functions of a particular module.\n\nThe reason is that the :mod: hook bypasses the hash that is setup\nto allow individual users to trace their own functions and uses\nthe global hash directly. But if the global hash has not been\nset up, it will cause a bug:\n\necho \u0027*:mod:radeon\u0027 \u003e /sys/kernel/debug/set_ftrace_filter\n\nproduces:\n\n [drm:drm_mode_getfb] *ERROR* invalid framebuffer id\n [drm:radeon_crtc_page_flip] *ERROR* failed to reserve new rbo buffer before flip\n BUG: unable to handle kernel paging request at ffffffff8160ec90\n IP: [\u003cffffffff810d9136\u003e] add_hash_entry+0x66/0xd0\n PGD 1a05067 PUD 1a09063 PMD 80000000016001e1\n Oops: 0003 [#1] SMP Jul 7 04:02:28 phyllis kernel: [55303.858604] CPU 1\n Modules linked in: cryptd aes_x86_64 aes_generic binfmt_misc rfcomm bnep ip6table_filter hid radeon r8169 ahci libahci mii ttm drm_kms_helper drm video i2c_algo_bit intel_agp intel_gtt\n\n Pid: 10344, comm: bash Tainted: G WC 3.0.0-rc5 #1 Dell Inc. Inspiron N5010/0YXXJJ\n RIP: 0010:[\u003cffffffff810d9136\u003e] [\u003cffffffff810d9136\u003e] add_hash_entry+0x66/0xd0\n RSP: 0018:ffff88003a96bda8 EFLAGS: 00010246\n RAX: ffff8801301735c0 RBX: ffffffff8160ec80 RCX: 0000000000306ee0\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880137c92940\n RBP: ffff88003a96bdb8 R08: ffff880137c95680 R09: 0000000000000000\n R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff81c9df78\n R13: ffff8801153d1000 R14: 0000000000000000 R15: 0000000000000000\n FS: 00007f329c18a700(0000) GS:ffff880137c80000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: ffffffff8160ec90 CR3: 000000003002b000 CR4: 00000000000006e0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400\n Process bash (pid: 10344, threadinfo ffff88003a96a000, task ffff88012fcfc470)\n Stack:\n 0000000000000fd0 00000000000000fc ffff88003a96be38 ffffffff810d92f5\n ffff88011c4c4e00 ffff880000000000 000000000b69f4d0 ffffffff8160ec80\n ffff8800300e6f06 0000000081130295 0000000000000282 ffff8800300e6f00\n Call Trace:\n [\u003cffffffff810d92f5\u003e] match_records+0x155/0x1b0\n [\u003cffffffff810d940c\u003e] ftrace_mod_callback+0xbc/0x100\n [\u003cffffffff810dafdf\u003e] ftrace_regex_write+0x16f/0x210\n [\u003cffffffff810db09f\u003e] ftrace_filter_write+0xf/0x20\n [\u003cffffffff81166e48\u003e] vfs_write+0xc8/0x190\n [\u003cffffffff81167001\u003e] sys_write+0x51/0x90\n [\u003cffffffff815c7e02\u003e] system_call_fastpath+0x16/0x1b\n Code: 48 8b 33 31 d2 48 85 f6 75 33 49 89 d4 4c 03 63 08 49 8b 14 24 48 85 d2 48 89 10 74 04 48 89 42 08 49 89 04 24 4c 89 60 08 31 d2\n RIP [\u003cffffffff810d9136\u003e] add_hash_entry+0x66/0xd0\n RSP \u003cffff88003a96bda8\u003e\n CR2: ffffffff8160ec90\n ---[ end trace a5d031828efdd88e ]---\n\nReported-by: Brian Marete \u003cmarete@toshnix.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "40ee4dffff061399eb9358e0c8fcfbaf8de4c8fe", "tree": "88b61ccc46994332d6f59cc1e6b2848fffc9a990", "parents": [ "e9dbfae53eeb9fc3d4bb7da3df87fa9875f5da02" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Jul 05 14:32:51 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jul 07 11:22:29 2011 -0400" }, "message": "tracing: Have \"enable\" file use refcounts like the \"filter\" file\n\nThe \"enable\" file for the event system can be removed when a module\nis unloaded and the event system only has events from that module.\nAs the event system nr_events count goes to zero, it may be freed\nif its ref_count is also set to zero.\n\nLike the \"filter\" file, the \"enable\" file may be opened by a task and\nreferenced later, after a module has been unloaded and the events for\nthat event system have been removed.\n\nAlthough the \"filter\" file referenced the event system structure,\nthe \"enable\" file only references a pointer to the event system\nname. Since the name is freed when the event system is removed,\nit is possible that an access to the \"enable\" file may reference\na freed pointer.\n\nUpdate the \"enable\" file to use the subsystem_open() routine that\nthe \"filter\" file uses, to keep a reference to the event system\nstructure while the \"enable\" file is opened.\n\nCc: \u003cstable@kernel.org\u003e\nReported-by: Johannes Berg \u003cjohannes.berg@intel.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "e9dbfae53eeb9fc3d4bb7da3df87fa9875f5da02", "tree": "2a389b9c6a5fe08d4fb3a9ca96e753244963e1d9", "parents": [ "140fe3b1ab9c082182ef13359fab4ddba95c24c3" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Jul 05 11:36:06 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Jul 07 11:19:18 2011 -0400" }, "message": "tracing: Fix bug when reading system filters on module removal\n\nThe event system is freed when its nr_events is set to zero. This happens\nwhen a module created an event system and then later the module is\nremoved. Modules may share systems, so the system is allocated when\nit is created and freed when the modules are unloaded and all the\nevents under the system are removed (nr_events set to zero).\n\nThe problem arises when a task opened the \"filter\" file for the\nsystem. If the module is unloaded and it removed the last event for\nthat system, the system structure is freed. If the task that opened\nthe filter file accesses the \"filter\" file after the system has\nbeen freed, the system will access an invalid pointer.\n\nBy adding a ref_count, and using it to keep track of what\nis using the event system, we can free it after all users\nare finished with the event system.\n\nCc: \u003cstable@kernel.org\u003e\nReported-by: Johannes Berg \u003cjohannes.berg@intel.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "931da6137e8e8c622f59251e8b645467aea293f1", "tree": "2169cbd29d5d9a4cbc7104b2a744a95ba746c50d", "parents": [ "5d67be97f8903d05ce53597fb5f3bc25a45e8026", "1fd8df2c3970c9e7e4e262354154ee39e58bdd7c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jul 05 11:55:43 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jul 05 11:55:43 2011 +0200" }, "message": "Merge branch \u0027tip/perf/core-2\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core\n" }, { "commit": "1fd8df2c3970c9e7e4e262354154ee39e58bdd7c", "tree": "640fbc584af8870917ea6d1fab4da49d299038ad", "parents": [ "c624d33f61cd05241e85b906311f0b712fdb0f32" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Wed Jun 08 16:09:34 2011 +0900" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:53 2011 -0400" }, "message": "tracing/kprobes: Fix kprobe-tracer to support stack trace\n\nFix to support kernel stack trace correctly on kprobe-tracer.\nSince the execution path of kprobe-based dynamic events is different\nfrom other tracepoint-based events, normal ftrace_trace_stack() doesn\u0027t\nwork correctly. To fix that, this introduces ftrace_trace_stack_regs()\nwhich traces stack via pt_regs instead of current stack register.\n\ne.g.\n\n # echo p schedule+4 \u003e /sys/kernel/debug/tracing/kprobe_events\n # echo 1 \u003e /sys/kernel/debug/tracing/options/stacktrace\n # echo 1 \u003e /sys/kernel/debug/tracing/events/kprobes/enable\n # head -n 20 /sys/kernel/debug/tracing/trace\n bash-2968 [000] 10297.050245: p_schedule_4: (schedule+0x4/0x4ca)\n bash-2968 [000] 10297.050247: \u003cstack trace\u003e\n \u003d\u003e schedule_timeout\n \u003d\u003e n_tty_read\n \u003d\u003e tty_read\n \u003d\u003e vfs_read\n \u003d\u003e sys_read\n \u003d\u003e system_call_fastpath\n kworker/0:1-2940 [000] 10297.050265: p_schedule_4: (schedule+0x4/0x4ca)\n kworker/0:1-2940 [000] 10297.050266: \u003cstack trace\u003e\n \u003d\u003e worker_thread\n \u003d\u003e kthread\n \u003d\u003e kernel_thread_helper\n sshd-1132 [000] 10297.050365: p_schedule_4: (schedule+0x4/0x4ca)\n sshd-1132 [000] 10297.050365: \u003cstack trace\u003e\n \u003d\u003e sysret_careful\n\nNote: Even with this fix, the first entry will be skipped\nif the probe is put on the function entry area before\nthe frame pointer is set up (usually, that is 4 bytes\n (push %bp; mov %sp %bp) on x86), because stack unwinder\ndepends on the frame pointer.\n\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: yrl.pp-manager.tt@hitachi.com\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nLink: http://lkml.kernel.org/r/20110608070934.17777.17116.stgit@fedora15\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "d7ec4bfed6c97405c6417970ba06c439e08ab8e3", "tree": "35272bc4262f70243382d085787765c5e83d6736", "parents": [ "22fe9b54d859e53bfbbbdc1a0a77a82bc453927c" ], "author": { "name": "Vaibhav Nagarnaik", "email": "vnagarnaik@google.com", "time": "Tue Jun 07 17:01:42 2011 -0700" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:51 2011 -0400" }, "message": "ring-buffer: Set __GFP_NORETRY flag for ring buffer allocating process\n\nThe tracing ring buffer is allocated from kernel memory. While\nallocating a large chunk of memory, OOM might happen which destabilizes\nthe system. Thus random processes might get killed during the\nallocation.\n\nThis patch adds __GFP_NORETRY flag to the ring buffer allocation calls\nto make it fail more gracefully if the system will not be able to\ncomplete the allocation request.\n\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Vaibhav Nagarnaik \u003cvnagarnaik@google.com\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Michael Rubin \u003cmrubin@google.com\u003e\nCc: David Sharp \u003cdhsharp@google.com\u003e\nLink: http://lkml.kernel.org/r/1307491302-9236-1-git-send-email-vnagarnaik@google.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "22fe9b54d859e53bfbbbdc1a0a77a82bc453927c", "tree": "4aec2d069decbe0786ad5474908f5bbe49732ad4", "parents": [ "749230b06a753a22f6ed96e5dd60815d6ab12865" ], "author": { "name": "Peter Huewe", "email": "peterhuewe@gmx.de", "time": "Tue Jun 07 21:58:27 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:50 2011 -0400" }, "message": "tracing: Convert to kstrtoul_from_user\n\nThis patch replaces the code for getting an unsigned long from a\nuserspace buffer by a simple call to kstroul_from_user.\nThis makes it easier to read and less error prone.\n\nSigned-off-by: Peter Huewe \u003cpeterhuewe@gmx.de\u003e\nLink: http://lkml.kernel.org/r/1307476707-14762-1-git-send-email-peterhuewe@gmx.de\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "749230b06a753a22f6ed96e5dd60815d6ab12865", "tree": "32aa2fb64a4fe4c7a9effee21f379486703ecd28", "parents": [ "199abfab40389963b397c2982222e68ea782b2cf" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Fri Jun 03 16:58:51 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:49 2011 -0400" }, "message": "tracing, function_graph: Add context-info support for function_graph tracer\n\nThe function_graph tracer does not follow global context-info option.\nAdding TRACE_ITER_CONTEXT_INFO trace_flags check to enable it.\n\nWith following commands:\n\t# echo function_graph \u003e ./current_tracer\n\t# echo 0 \u003e options/context-info\n\t# cat trace\n\nThis is what it looked like before:\n# tracer: function_graph\n#\n# TIME CPU DURATION FUNCTION CALLS\n# | | | | | | | |\n 1) 0.079 us | } /* __vma_link_rb */\n 1) 0.056 us | copy_page_range();\n 1) | security_vm_enough_memory() {\n...\n\nThis is what it looks like now:\n# tracer: function_graph\n#\n } /* update_ts_time_stats */\n timekeeping_max_deferment();\n...\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1307113131-10045-6-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "199abfab40389963b397c2982222e68ea782b2cf", "tree": "4b3707a3c8266f151ed1cd72be286ccc7dc16b81", "parents": [ "f56e7f8efb4ec200364f690a9902713410e24d47" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Fri Jun 03 16:58:50 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:49 2011 -0400" }, "message": "tracing, function_graph: Remove lock-depth from latency trace\n\nThe lock_depth was removed in commit\ne6e1e25 tracing: Remove lock_depth from event entry\n\nRemoving the lock_depth info from function_graph latency header.\n\nWith following commands:\n\t# echo function_graph \u003e ./current_tracer\n\t# echo 1 \u003e options/latency-format\n\t# cat trace\n\nThis is what it looked like before:\n# tracer: function_graph\n#\n# function_graph latency trace v1.1.5 on 3.0.0-rc1-tip+\n# --------------------------------------------------------------------\n# latency: 0 us, #59756/311298, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)\n# -----------------\n# | task: -0 (uid:0 nice:0 policy:0 rt_prio:0)\n# -----------------\n#\n# _-----\u003d\u003e irqs-off\n# / _----\u003d\u003e need-resched\n# | / _---\u003d\u003e hardirq/softirq\n# || / _--\u003d\u003e preempt-depth\n# ||| / _-\u003d\u003e lock-depth\n# |||| /\n# CPU||||| DURATION FUNCTION CALLS\n# | ||||| | | | | | |\n 0) .... 0.068 us | } /* __rcu_read_unlock */\n...\n\nThis is what it looks like now:\n# tracer: function_graph\n#\n# function_graph latency trace v1.1.5 on 3.0.0-rc1-tip+\n# --------------------------------------------------------------------\n# latency: 0 us, #59747/1744610, CPU#0 | (M:preempt VP:0, KP:0, SP:0 HP:0 #P:2)\n# -----------------\n# | task: -0 (uid:0 nice:0 policy:0 rt_prio:0)\n# -----------------\n#\n# _-----\u003d\u003e irqs-off\n# / _----\u003d\u003e need-resched\n# | / _---\u003d\u003e hardirq/softirq\n# || / _--\u003d\u003e preempt-depth\n# ||| /\n# CPU|||| DURATION FUNCTION CALLS\n# | |||| | | | | | |\n 0) ..s. 1.641 us | } /* __rcu_process_callbacks */\n...\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1307113131-10045-5-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "f56e7f8efb4ec200364f690a9902713410e24d47", "tree": "f8708b5a7f82be989b987fbf190a55054dd41c7b", "parents": [ "ffeb80fc30acbf6bd51cb47a1815f621a9d017dc" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Fri Jun 03 16:58:49 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:48 2011 -0400" }, "message": "tracing, function: Fix trace header to follow context-info option\n\nThe header display of function tracer does not follow\nthe context-info option, so field names are displayed even\nif this option is off.\n\nAdded check for TRACE_ITER_CONTEXT_INFO trace_flags.\n\nWith following commands:\n\t# echo function \u003e ./current_tracer\n\t# echo 0 \u003e options/context-info\n\t# cat trace\n\nThis is what it looked like before:\n# tracer: function\n#\n# TASK-PID CPU# TIMESTAMP FUNCTION\n# | | | | |\nadd_preempt_count \u003c-schedule\nrcu_note_context_switch \u003c-schedule\n...\n\nThis is what it looks like now:\n# tracer: function\n#\n_raw_spin_unlock_irqrestore \u003c-hrtimer_try_to_cancel\n...\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1307113131-10045-4-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "ffeb80fc30acbf6bd51cb47a1815f621a9d017dc", "tree": "0291039ad5bc7f652d15157616ea2a77b7294638", "parents": [ "321e68b095addc473ca52ced9acfa59be88f76e6" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Fri Jun 03 16:58:48 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:47 2011 -0400" }, "message": "tracing, function_graph: Merge overhead and duration display functions\n\nFunctions print_graph_overhead() and print_graph_duration() displays\ndata for one field - DURATION.\n\nI merged them into single function print_graph_duration(),\nand added a way to display the empty parts of the field.\n\nThis way the print_graph_irq() function can use this column to display\nthe IRQ signs if needed and the DURATION field details stays inside\nthe print_graph_duration() function.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1307113131-10045-3-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "321e68b095addc473ca52ced9acfa59be88f76e6", "tree": "43fed76c347373b651692b275f4152dcaf72eb21", "parents": [ "84c15027a7f2fbd7f1180d7cbb60e41abbbaedd2" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Fri Jun 03 16:58:47 2011 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:47 2011 -0400" }, "message": "tracing, function_graph: Remove dependency of abstime and duration fields on latency\n\nThe display of absolute time and duration fields is based on the\nlatency field. This was added during the irqsoff/wakeup tracers\ngraph support changes.\n\nIt\u0027s causing confusion in what fields will be displayed for the\nfunction_graph tracer itself. So I\u0027m removing this depency, and\nadding absolute time and duration fields to the preemptirqsoff\npreemptoff irqsoff wakeup tracers.\n\nWith following commands:\n\t# echo function_graph \u003e ./current_tracer\n\t# cat trace\n\nThis is what it looked like before:\n# tracer: function_graph\n#\n# TIME CPU DURATION FUNCTION CALLS\n# | | | | | | | |\n 0) 0.068 us | } /* page_add_file_rmap */\n 0) | _raw_spin_unlock() {\n...\n\nThis is what it looks like now:\n# tracer: function_graph\n#\n# CPU DURATION FUNCTION CALLS\n# | | | | | | |\n 0) 0.068 us | } /* add_preempt_count */\n 0) 0.993 us | } /* vfsmount_lock_local_lock */\n...\n\nFor preemptirqsoff preemptoff irqsoff wakeup tracers,\nthis is what it looked like before:\nSNIP\n# _-----\u003d\u003e irqs-off\n# / _----\u003d\u003e need-resched\n# | / _---\u003d\u003e hardirq/softirq\n# || / _--\u003d\u003e preempt-depth\n# ||| / _-\u003d\u003e lock-depth\n# |||| /\n# CPU TASK/PID ||||| DURATION FUNCTION CALLS\n# | | | ||||| | | | | | |\n 1) \u003cidle\u003e-0 | d..1 0.000 us | acpi_idle_enter_simple();\n...\n\nThis is what it looks like now:\nSNIP\n#\n# _-----\u003d\u003e irqs-off\n# / _----\u003d\u003e need-resched\n# | / _---\u003d\u003e hardirq/softirq\n# || / _--\u003d\u003e preempt-depth\n# ||| /\n# TIME CPU TASK/PID |||| DURATION FUNCTION CALLS\n# | | | | |||| | | | | | |\n 19.847735 | 1) \u003cidle\u003e-0 | d..1 0.000 us | acpi_idle_enter_simple();\n...\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLink: http://lkml.kernel.org/r/1307113131-10045-2-git-send-email-jolsa@redhat.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "bd38c0e6f98326132a691d73b2056b426423c638", "tree": "4e7f9a0efcfdb23e564db51da275fd9234ffa84f", "parents": [ "cf30cf67d6c7592c670ec946d89fc15ee0deb0eb" ], "author": { "name": "Paul McQuade", "email": "tungstentide@gmail.com", "time": "Tue May 31 20:51:55 2011 +0100" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:45 2011 -0400" }, "message": "ftrace: Fixed an include coding style issue\n\nRemoved \u003casm/ftrace.h\u003e because \u003clinux/ftrace.h\u003e was already declared.\nBraces of struct\u0027s coding style fixed.\n\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Paul McQuade \u003ctungstentide@gmail.com\u003e\nLink: http://lkml.kernel.org/r/4DE59711.3090900@gmail.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "cf30cf67d6c7592c670ec946d89fc15ee0deb0eb", "tree": "f86ca612b255ee8570e2fd6198e066ea8cf33fe0", "parents": [ "4f271a2a60c748599b30bb4dafff30d770439b96" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Jun 14 22:44:07 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:45 2011 -0400" }, "message": "tracing: Add disable_on_free option\n\nAdd a trace option to disable tracing on free. When this option is\nset, a write into the free_buffer file will not only shrink the\nring buffer down to zero, but it will also disable tracing.\n\nCc: Vaibhav Nagarnaik \u003cvnagarnaik@google.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "4f271a2a60c748599b30bb4dafff30d770439b96", "tree": "4b6aa671e0fbe3e81a423a551ce5aa1032725e2b", "parents": [ "7ea5906405a1f3fc1c0033dfd7e02f2cfd1de5e5" ], "author": { "name": "Vaibhav Nagarnaik", "email": "vnagarnaik@google.com", "time": "Mon Jun 13 17:51:57 2011 -0700" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:48:37 2011 -0400" }, "message": "tracing: Add a proc file to stop tracing and free buffer\n\nThe proc file entry buffer_size_kb is used to set the size of tracing\nbuffer. The memory to expand the buffer size is kernel memory. Consider\na use case where tracing is handled by a user space utility, which acts\nas a gate keeper for tracing requests. In an OOM condition, tracing is\nconsidered a low priority task and if the utility gets killed the ring\nbuffer memory cannot be released back to the kernel.\n\nThis patch adds a proc file called \"free_buffer\" whose purpose is to\nstop tracing and free up the ring buffer when it is closed.\n\nThe user space process can then set the desired size in buffer_size_kb\nfile and open the fd to the \"free_buffer\" file. Under OOM condition, if\nthe process gets killed, the kernel closes the file descriptor. The\nrelease handler stops the tracing and releases the kernel memory\nautomatically.\n\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Michael Rubin \u003cmrubin@google.com\u003e\nCc: David Sharp \u003cdhsharp@google.com\u003e\nSigned-off-by: Vaibhav Nagarnaik \u003cvnagarnaik@google.com\u003e\nLink: http://lkml.kernel.org/r/1308012717-11148-1-git-send-email-vnagarnaik@google.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "7ea5906405a1f3fc1c0033dfd7e02f2cfd1de5e5", "tree": "f75e962db25ccd3efa81e1fc69ce3e60d228c7a6", "parents": [ "e7e2ee89a9dbf48d70a922d5625cd7320a27cbff" ], "author": { "name": "Vaibhav Nagarnaik", "email": "vnagarnaik@google.com", "time": "Tue May 03 17:56:42 2011 -0700" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 22:04:39 2011 -0400" }, "message": "tracing: Use NUMA allocation for per-cpu ring buffer pages\n\nThe tracing ring buffer is a group of per-cpu ring buffers where\nallocation and logging is done on a per-cpu basis. The events that are\ngenerated on a particular CPU are logged in the corresponding buffer.\nThis is to provide wait-free writes between CPUs and good NUMA node\nlocality while accessing the ring buffer.\n\nHowever, the allocation routines consider NUMA locality only for buffer\npage metadata and not for the actual buffer page. This causes the pages\nto be allocated on the NUMA node local to the CPU where the allocation\nroutine is running at the time.\n\nThis patch fixes the problem by using a NUMA node specific allocation\nroutine so that the pages are allocated from a NUMA node local to the\nlogging CPU.\n\nI tested with the getuid_microbench from autotest. It is a simple binary\nthat calls getuid() in a loop and measures the average time for the\nsyscall to complete. The following command was used to test:\n$ getuid_microbench 1000000\n\nCompared the numbers found on kernel with and without this patch and\nfound that logging latency decreases by 30-50 ns/call.\ntracing with non-NUMA allocation - 569 ns/call\ntracing with NUMA allocation - 512 ns/call\n\nSigned-off-by: Vaibhav Nagarnaik \u003cvnagarnaik@google.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Michael Rubin \u003cmrubin@google.com\u003e\nCc: David Sharp \u003cdhsharp@google.com\u003e\nLink: http://lkml.kernel.org/r/1304470602-20366-1-git-send-email-vnagarnaik@google.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "e7e2ee89a9dbf48d70a922d5625cd7320a27cbff", "tree": "58a5d3387c7b0bf9a4f434867234c0771c22addb", "parents": [ "b58f6b0dd3d677338b9065388cc2cc942b86338e" ], "author": { "name": "Vaibhav Nagarnaik", "email": "vnagarnaik@google.com", "time": "Tue May 10 13:27:21 2011 -0700" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Jun 14 21:59:41 2011 -0400" }, "message": "tracing: Schedule a delayed work to call wakeup()\n\nIn using syscall tracing by concurrent processes, the wakeup() that is\ncalled in the event commit function causes contention on the spin lock\nof the waitqueue. I enabled sys_enter_getuid and sys_exit_getuid\ntracepoints, and by running getuid_microbench from autotest in parallel\nI found that the contention causes exponential latency increase in the\ntracing path.\n\nThe autotest binary getuid_microbench calls getuid() in a tight loop for\nthe given number of iterations and measures the average time required to\ncomplete a single invocation of syscall.\n\nThe patch schedules a delayed work after 2 ms once an event commit calls\nto wake up the trace wait_queue. This removes the delay caused by\ncontention on spin lock in wakeup() and amortizes the wakeup() calls\nscheduled over the 2 ms period.\n\nIn the following example, the script enables the sys_enter_getuid and\nsys_exit_getuid tracepoints and runs the getuid_microbench in parallel\nwith the given number of processes. The output clearly shows the latency\nincrease caused by contentions.\n\n$ ~/getuid.sh 1\n1000000 calls in 0.720974253 s (720.974253 ns/call)\n\n$ ~/getuid.sh 2\n1000000 calls in 1.166457554 s (1166.457554 ns/call)\n1000000 calls in 1.168933765 s (1168.933765 ns/call)\n\n$ ~/getuid.sh 3\n1000000 calls in 1.783827516 s (1783.827516 ns/call)\n1000000 calls in 1.795553270 s (1795.553270 ns/call)\n1000000 calls in 1.796493376 s (1796.493376 ns/call)\n\n$ ~/getuid.sh 4\n1000000 calls in 4.483041796 s (4483.041796 ns/call)\n1000000 calls in 4.484165388 s (4484.165388 ns/call)\n1000000 calls in 4.484850762 s (4484.850762 ns/call)\n1000000 calls in 4.485643576 s (4485.643576 ns/call)\n\n$ ~/getuid.sh 5\n1000000 calls in 6.497521653 s (6497.521653 ns/call)\n1000000 calls in 6.502000236 s (6502.000236 ns/call)\n1000000 calls in 6.501709115 s (6501.709115 ns/call)\n1000000 calls in 6.502124100 s (6502.124100 ns/call)\n1000000 calls in 6.502936358 s (6502.936358 ns/call)\n\nAfter the patch, the latencies scale better.\n1000000 calls in 0.728720455 s (728.720455 ns/call)\n\n1000000 calls in 0.842782857 s (842.782857 ns/call)\n1000000 calls in 0.883803135 s (883.803135 ns/call)\n\n1000000 calls in 0.902077764 s (902.077764 ns/call)\n1000000 calls in 0.902838202 s (902.838202 ns/call)\n1000000 calls in 0.908896885 s (908.896885 ns/call)\n\n1000000 calls in 0.932523515 s (932.523515 ns/call)\n1000000 calls in 0.958009672 s (958.009672 ns/call)\n1000000 calls in 0.986188020 s (986.188020 ns/call)\n1000000 calls in 0.989771102 s (989.771102 ns/call)\n\n1000000 calls in 0.933518391 s (933.518391 ns/call)\n1000000 calls in 0.958897947 s (958.897947 ns/call)\n1000000 calls in 1.031038897 s (1031.038897 ns/call)\n1000000 calls in 1.089516025 s (1089.516025 ns/call)\n1000000 calls in 1.141998347 s (1141.998347 ns/call)\n\nSigned-off-by: Vaibhav Nagarnaik \u003cvnagarnaik@google.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Michael Rubin \u003cmrubin@google.com\u003e\nCc: David Sharp \u003cdhsharp@google.com\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/r/1305059241-7629-1-git-send-email-vnagarnaik@google.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\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": "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": "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": "b1cff0ad1062621ae63cb6c5dc4165191fe2e9f1", "tree": "81c35a8fe57b1a139416aac637b0fc198f67199d", "parents": [ "7f34b746f79c1e1f8fd6d09799d133263ae7a504" ], "author": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 25 14:27:43 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 25 22:13:49 2011 -0400" }, "message": "ftrace: Add internal recursive checks\n\nWitold reported a reboot caused by the selftests of the dynamic function\ntracer. He sent me a config and I used ktest to do a config_bisect on it\n(as my config did not cause the crash). It pointed out that the problem\nconfig was CONFIG_PROVE_RCU.\n\nWhat happened was that if multiple callbacks are attached to the\nfunction tracer, we iterate a list of callbacks. Because the list is\nmanaged by synchronize_sched() and preempt_disable, the access to the\npointers uses rcu_dereference_raw().\n\nWhen PROVE_RCU is enabled, the rcu_dereference_raw() calls some\ndebugging functions, which happen to be traced. The tracing of the debug\nfunction would then call rcu_dereference_raw() which would then call the\ndebug function and then... well you get the idea.\n\nI first wrote two different patches to solve this bug.\n\n1) add a __rcu_dereference_raw() that would not do any checks.\n2) add notrace to the offending debug functions.\n\nBoth of these patches worked.\n\nTalking with Paul McKenney on IRC, he suggested to add recursion\ndetection instead. This seemed to be a better solution, so I decided to\nimplement it. As the task_struct already has a trace_recursion to detect\nrecursion in the ring buffer, and that has a very small number it\nallows, I decided to use that same variable to add flags that can detect\nthe recursion inside the infrastructure of the function tracer.\n\nI plan to change it so that the task struct bit can be checked in\nmcount, but as that requires changes to all archs, I will hold that off\nto the next merge window.\n\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nLink: http://lkml.kernel.org/r/1306348063.1465.116.camel@gandalf.stny.rr.com\nReported-by: Witold Baryluk \u003cbaryluk@smp.if.uj.edu.pl\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "2fc1b6f0d0a719e1e2a30bf076a3a799feaf6af2", "tree": "3101c47095ef438b6657b7e0dbb57b2f7188666f", "parents": [ "3b6cfdb1714a33ae4d2ca9fbc818a42cf7adee69" ], "author": { "name": "liubo", "email": "liubo2009@cn.fujitsu.com", "time": "Tue Apr 19 09:35:28 2011 +0800" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 25 22:13:44 2011 -0400" }, "message": "tracing: Add __print_symbolic_u64 to avoid warnings on 32bit machine\n\nFilesystem, like Btrfs, has some \"ULL\" macros, and when these macros are passed\nto tracepoints\u0027__print_symbolic(), there will be 64-\u003e32 truncate WARNINGS during\ncompiling on 32bit box.\n\nSigned-off-by: Liu Bo \u003cliubo2009@cn.fujitsu.com\u003e\nLink: http://lkml.kernel.org/r/4DACE6E0.7000507@cn.fujitsu.com\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "3b6cfdb1714a33ae4d2ca9fbc818a42cf7adee69", "tree": "1fc1ca6ff17da6c7ab30d2dffa99d3cb6d4cfca4", "parents": [ "17bb615ad4f8d2d2c0f02794d27d7f83e0009ef4" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon May 23 15:33:49 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 25 22:13:42 2011 -0400" }, "message": "ftrace: Set ops-\u003eflag to enabled even on static function tracing\n\nWhen dynamic ftrace is not configured, the ops-\u003eflags still needs\nto have its FTRACE_OPS_FL_ENABLED bit set in ftrace_startup().\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "17bb615ad4f8d2d2c0f02794d27d7f83e0009ef4", "tree": "6d312c4fc2c35c057e77f257ec9b82be0ce27cce", "parents": [ "a1cd6173596c6f7d1f0b41ac7d33ecf03c581edc" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon May 23 15:27:46 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 25 22:13:39 2011 -0400" }, "message": "tracing: Have event with function tracer check error return\n\nThe self tests for event tracer does not check if the function\ntracing was successfully activated. It needs to before it continues\nthe tests, otherwise the wrong errors may be reported.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "a1cd6173596c6f7d1f0b41ac7d33ecf03c581edc", "tree": "413ed775a2c48d8ad003740fa6ef0d912f784842", "parents": [ "7cbc5b8d4a775a43875a09e29c49a2a8195b5b2d" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon May 23 15:24:25 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 25 22:13:37 2011 -0400" }, "message": "ftrace: Have ftrace_startup() return failure code\n\nThe register_ftrace_function() returns an error code on failure\nexcept if the call to ftrace_startup() fails. Add a error return to\nftrace_startup() if it fails to start, allowing register_ftrace_funtion()\nto return a proper error value.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "80fe02b5daf176f99d3afc8f6c9dc9dece019836", "tree": "970b90d56870e1b87b4c8efff7ec31fc454445a7", "parents": [ "df48d8716eab9608fe93924e4ae06ff110e8674f", "db670dac49b5423b39b5e523d28fe32045d71b10", "ec514c487c3d4b652943da7b0afbc094eee08cfa" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 19 17:41:22 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 19 17:41:22 2011 -0700" }, "message": "Merge branches \u0027sched-core-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* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (60 commits)\n sched: Fix and optimise calculation of the weight-inverse\n sched: Avoid going ahead if -\u003ecpus_allowed is not changed\n sched, rt: Update rq clock when unthrottling of an otherwise idle CPU\n sched: Remove unused parameters from sched_fork() and wake_up_new_task()\n sched: Shorten the construction of the span cpu mask of sched domain\n sched: Wrap the \u0027cfs_rq-\u003enr_spread_over\u0027 field with CONFIG_SCHED_DEBUG\n sched: Remove unused \u0027this_best_prio arg\u0027 from balance_tasks()\n sched: Remove noop in alloc_rt_sched_group()\n sched: Get rid of lock_depth\n sched: Remove obsolete comment from scheduler_tick()\n sched: Fix sched_domain iterations vs. RCU\n sched: Next buddy hint on sleep and preempt path\n sched: Make set_*_buddy() work on non-task entities\n sched: Remove need_migrate_task()\n sched: Move the second half of ttwu() to the remote cpu\n sched: Restructure ttwu() some more\n sched: Rename ttwu_post_activation() to ttwu_do_wakeup()\n sched: Remove rq argument from ttwu_stat()\n sched: Remove rq-\u003elock from the first half of ttwu()\n sched: Drop rq-\u003elock from sched_exec()\n ...\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 rt_rq runtime leakage bug\n" }, { "commit": "95950c2ecb31314ef827428e43ff771cf3b037e5", "tree": "1ecf9605cc280d362a5a9ddf96bf538cdb47c1aa", "parents": [ "936e074b286ae779f134312178dbab139ee7ea52" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri May 06 00:08:51 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 19:24:51 2011 -0400" }, "message": "ftrace: Add self-tests for multiple function trace users\n\nAdd some basic sanity tests for multiple users of the function\ntracer at startup.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "936e074b286ae779f134312178dbab139ee7ea52", "tree": "6b0497be4d5e6258ad9b1ec99b2a9feb25b2dd22", "parents": [ "cdbe61bfe70440939e457fb4a8d0995eaaed17de" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu May 05 22:54:01 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 19:22:52 2011 -0400" }, "message": "ftrace: Modify ftrace_set_filter/notrace to take ops\n\nSince users of the function tracer can now pick and choose which\nfunctions they want to trace agnostically from other users of the\nfunction tracer, we need to pass the ops struct to the ftrace_set_filter()\nfunctions.\n\nThe functions ftrace_set_global_filter() and ftrace_set_global_notrace()\nis added to keep the old filter functions which are used to modify\nthe generic function tracers.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "cdbe61bfe70440939e457fb4a8d0995eaaed17de", "tree": "6e82066db25ab6fa42455a42bb77783dac5260b8", "parents": [ "b848914ce39589d89ee0078a6d1ef452b464729e" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu May 05 21:14:55 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:51 2011 -0400" }, "message": "ftrace: Allow dynamically allocated function tracers\n\nNow that functions may be selected individually, it only makes sense\nthat we should allow dynamically allocated trace structures to\nbe traced. This will allow perf to allocate a ftrace_ops structure\nat runtime and use it to pick and choose which functions that\nstructure will trace.\n\nNote, a dynamically allocated ftrace_ops will always be called\nindirectly instead of being called directly from the mcount in\nentry.S. This is because there\u0027s no safe way to prevent mcount\nfrom being preempted before calling the function, unless we\nmodify every entry.S to do so (not likely). Thus, dynamically allocated\nfunctions will now be called by the ftrace_ops_list_func() that\nloops through the ops that are allocated if there are more than\none op allocated at a time. This loop is protected with a\npreempt_disable.\n\nTo determine if an ftrace_ops structure is allocated or not, a new\nutil function was added to the kernel/extable.c called\ncore_kernel_data(), which returns 1 if the address is between\n_sdata and _edata.\n\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "b848914ce39589d89ee0078a6d1ef452b464729e", "tree": "542bf09ae3c2d9118833132621585fb458e2a003", "parents": [ "07fd5515f3b5c20704707f63e7f4485b534508a8" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Wed May 04 09:27:52 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:50 2011 -0400" }, "message": "ftrace: Implement separate user function filtering\n\nftrace_ops that are registered to trace functions can now be\nagnostic to each other in respect to what functions they trace.\nEach ops has their own hash of the functions they want to trace\nand a hash to what they do not want to trace. A empty hash for\nthe functions they want to trace denotes all functions should\nbe traced that are not in the notrace hash.\n\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "07fd5515f3b5c20704707f63e7f4485b534508a8", "tree": "f018ec497f8c6b49a0fcfcd7a92a600e670f90f2", "parents": [ "2b499381bc50ede01b3d8eab164ca2fad00655f0" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu May 05 18:03:47 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:50 2011 -0400" }, "message": "ftrace: Free hash with call_rcu_sched()\n\nWhen a hash is modified and might be in use, we need to perform\na schedule RCU operation on it, as the hashes will soon be used\ndirectly in the function tracer callback.\n\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "2b499381bc50ede01b3d8eab164ca2fad00655f0", "tree": "3140c277582b03b1645fffcb829763d62e2f01fa", "parents": [ "bd69c30b1d08032d97ab0dabd7a1eb7fb73ca2b2" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue May 03 22:49:52 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:49 2011 -0400" }, "message": "ftrace: Have global_ops store the functions that are to be traced\n\nThis is a step towards each ops structure defining its own set\nof functions to trace. As the current code with pid\u0027s and such\nare specific to the global_ops, it is restructured to be used\nwith the global ops.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "bd69c30b1d08032d97ab0dabd7a1eb7fb73ca2b2", "tree": "e8bd00dc87de4f10f049e0c41fd09f630b96585d", "parents": [ "647bcd03d5b2fb44fd9c9ef1a4f50c2eee8f779a" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue May 03 21:55:54 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:48 2011 -0400" }, "message": "ftrace: Add ops parameter to ftrace_startup/shutdown functions\n\nIn order to allow different ops to enable different functions,\nthe ftrace_startup() and ftrace_shutdown() functions need the\nops parameter passed to them.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "647bcd03d5b2fb44fd9c9ef1a4f50c2eee8f779a", "tree": "32946158175458f16ae95c383ca7985162eefe09", "parents": [ "ed926f9b35cda0988234c356e16a7cb30f4e5338" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue May 03 14:39:21 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:47 2011 -0400" }, "message": "ftrace: Add enabled_functions file\n\nAdd the enabled_functions file that is used to show all the\nfunctions that have been enabled for tracing as well as their\nref counts. This helps seeing if any function has been registered\nand what functions are being traced.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "ed926f9b35cda0988234c356e16a7cb30f4e5338", "tree": "32169b7aaf6b0ef7815b095a544cce93e884bb73", "parents": [ "33dc9b1267d59cef46ff0bd6bc043190845dc919" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue May 03 13:25:24 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:47 2011 -0400" }, "message": "ftrace: Use counters to enable functions to trace\n\nEvery function has its own record that stores the instruction\npointer and flags for the function to be traced. There are only\ntwo flags: enabled and free. The enabled flag states that tracing\nfor the function has been enabled (actively traced), and the free\nflag states that the record no longer points to a function and can\nbe used by new functions (loaded modules).\n\nThese flags are now moved to the MSB of the flags (actually just\nthe top 32bits). The rest of the bits (30 bits) are now used as\na ref counter. Everytime a tracer register functions to trace,\nthose functions will have its counter incremented.\n\nWhen tracing is enabled, to determine if a function should be traced,\nthe counter is examined, and if it is non-zero it is set to trace.\n\nWhen a ftrace_ops is registered to trace functions, its hashes\nare examined. If the ftrace_ops filter_hash count is zero, then\nall functions are set to be traced, otherwise only the functions\nin the hash are to be traced. The exception to this is if a function\nis also in the ftrace_ops notrace_hash. Then that function\u0027s counter\nis not incremented for this ftrace_ops.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "33dc9b1267d59cef46ff0bd6bc043190845dc919", "tree": "d5a3f78a6aabcd33b9848d3bf86b9b53ff6ea2e0", "parents": [ "f45948e898e7bc76a73a468796d2ce80dd040058" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon May 02 17:34:47 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:46 2011 -0400" }, "message": "ftrace: Separate hash allocation and assignment\n\nWhen filtering, allocate a hash to insert the function records.\nAfter the filtering is complete, assign it to the ftrace_ops structure.\n\nThis allows the ftrace_ops structure to have a much smaller array of\nhash buckets instead of wasting a lot of memory.\n\nA read only empty_hash is created to be the minimum size that any ftrace_ops\ncan point to.\n\nWhen a new hash is created, it has the following steps:\n\no Allocate a default hash.\no Walk the function records assigning the filtered records to the hash\no Allocate a new hash with the appropriate size buckets\no Move the entries from the default hash to the new hash.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "f45948e898e7bc76a73a468796d2ce80dd040058", "tree": "483979d8030cc2cf156ed65218c03a2d6825d9f5", "parents": [ "1cf41dd79993389b012e4542ab502ce36ae7343f" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Mon May 02 12:29:25 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:45 2011 -0400" }, "message": "ftrace: Create a global_ops to hold the filter and notrace hashes\n\nCombine the filter and notrace hashes to be accessed by a single entity,\nthe global_ops. The global_ops is a ftrace_ops structure that is passed\nto different functions that can read or modify the filtering of the\nfunction tracer.\n\nThe ftrace_ops structure was modified to hold a filter and notrace\nhashes so that later patches may allow each ftrace_ops to have its own\nset of rules to what functions may be filtered.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "1cf41dd79993389b012e4542ab502ce36ae7343f", "tree": "e1d0b58b2256d5936cff0c9d29ca8f68a80cedd8", "parents": [ "b448c4e3ae6d20108dba1d7833f2c0d3dbad87ce" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Apr 29 20:59:51 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:44 2011 -0400" }, "message": "ftrace: Use hash instead for FTRACE_FL_FILTER\n\nWhen multiple users are allowed to have their own set of functions\nto trace, having the FTRACE_FL_FILTER flag will not be enough to\nhandle the accounting of those users. Each user will need their own\nset of functions.\n\nReplace the FTRACE_FL_FILTER with a filter_hash instead. This is\ntemporary until the rest of the function filtering accounting\ngets in.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "b448c4e3ae6d20108dba1d7833f2c0d3dbad87ce", "tree": "504e5a3640328458e652e41cfd2ed74e4652e5b3", "parents": [ "94692349c4fc1bc74c19a28f9379509361a06a3b" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Apr 29 15:12:32 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed May 18 15:29:44 2011 -0400" }, "message": "ftrace: Replace FTRACE_FL_NOTRACE flag with a hash of ignored functions\n\nTo prepare for the accounting system that will allow multiple users of\nthe function tracer, having the FTRACE_FL_NOTRACE as a flag in the\ndyn_trace record does not make sense.\n\nAll ftrace_ops will soon have a hash of functions they should trace\nand not trace. By making a global hash of functions not to trace makes\nthis easier for the transition.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "9cb5baba5e3acba0994ad899ee908799104c9965", "tree": "d5ff16000256a0bf56279926e6114b4603ede2b4", "parents": [ "7142d17e8f935fa842e9f6eece2281b6d41625d6", "693d92a1bbc9e42681c42ed190bd42b636ca876f" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu May 12 09:36:18 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu May 12 09:36:18 2011 +0200" }, "message": "Merge commit \u0027v2.6.39-rc7\u0027 into sched/core\n" }, { "commit": "932fed4e2e42c3d730c01bb63b1c4f812c533d5b", "tree": "11b1afac3a40d253cdb905c42901edfaae5e196e", "parents": [ "57d524154ffe99d27fb55e0e30ddbad9f4c35806", "693d92a1bbc9e42681c42ed190bd42b636ca876f" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 10 17:05:24 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue May 10 17:05:45 2011 +0200" }, "message": "Merge commit \u0027v2.6.39-rc7\u0027 into perf/core\n\nMerge reason: pull in the latest fixes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "a3a4a5acd3bd2f6f1e102e1f1b9d2e2bb320a7fd", "tree": "8ed40e1c0bb654d824e39e6b42d1619a2807e75d", "parents": [ "e5e06985bec89414ce2b3f301c24d884f609b020" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Thu May 05 23:55:18 2011 -0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri May 06 13:20:59 2011 -0700" }, "message": "Regression: partial revert \"tracing: Remove lock_depth from event entry\"\n\nThis partially reverts commit e6e1e2593592a8f6f6380496655d8c6f67431266.\n\nThat commit changed the structure layout of the trace structure, which\nin turn broke PowerTOP (1.9x generation) quite badly.\n\nI appreciate not wanting to expose the variable in question, and\nPowerTOP was not using it, so I\u0027ve replaced the variable with just a\npadding field - that way if in the future a new field is needed it can\njust use this padding field.\n\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ac0a3260f37b8616da8d33488ec94b94e6ae5b31", "tree": "0db61f7492d45f1d548b0bcef06a0df9c904442c", "parents": [ "809435ff4f43a5c0cb0201b3b89176253d5ade18", "b9df92d2a94eef8811061aecb1396290df440e2e" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 01 19:11:42 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 01 19:11:42 2011 +0200" }, "message": "Merge branch \u0027tip/perf/core\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core\n" }, { "commit": "809435ff4f43a5c0cb0201b3b89176253d5ade18", "tree": "607d673c02117656a956b54dd2bb80fe94edea61", "parents": [ "32673822e440eb92eb334631eb0a199d0c532d13", "058e297d34a404caaa5ed277de15698d8dc43000" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 01 19:09:39 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun May 01 19:09:39 2011 +0200" }, "message": "Merge branch \u0027tip/perf/urgent\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core\n" }, { "commit": "b9df92d2a94eef8811061aecb1396290df440e2e", "tree": "313ad90dd3cd726af8da4d7768c912f96b3daa9a", "parents": [ "491d0dcfb9707e1f83eff93ca503eb7573162ef2" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Apr 28 20:32:08 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Apr 29 22:53:14 2011 -0400" }, "message": "ftrace: Consolidate the function match routines for normal and mods\n\nThe code used for matching functions is almost identical between normal\nselecting of functions and using the :mod: feature of set_ftrace_notrace.\n\nConsolidate the two users into one function.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "491d0dcfb9707e1f83eff93ca503eb7573162ef2", "tree": "ab156f8c4bc8ebfcc7429533a34726226a11bbba", "parents": [ "996e87be7f537fb34638875dd37083166c733425" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Wed Apr 27 21:43:36 2011 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Fri Apr 29 22:53:11 2011 -0400" }, "message": "ftrace: Consolidate updating of ftrace_trace_function\n\nThere are three locations that perform almost identical functions in order\nto update the ftrace_trace_function (the ftrace function variable that gets\ncalled by mcount).\n\nConsolidate these into a single function called update_ftrace_function().\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" } ], "next": "996e87be7f537fb34638875dd37083166c733425" }