)]}' { "log": [ { "commit": "635c17c2b2b4e5cd34f5dcba19d751b4e58533c2", "tree": "8d24215b1eb84157679c212e40541fcdb9fe9d8c", "parents": [ "6abded71d730322df96c5b7f4ab952ffd5a0080d" ], "author": { "name": "Namhyung Kim", "email": "namhyung@gmail.com", "time": "Wed Sep 15 10:04:30 2010 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:44:02 2010 +0200" }, "message": "kprobes: Add sparse context annotations\n\nThis removes following warnings when build with C\u003d1\n\n warning: context imbalance in \u0027kretprobe_hash_lock\u0027 - wrong count at exit\n warning: context imbalance in \u0027kretprobe_table_lock\u0027 - wrong count at exit\n warning: context imbalance in \u0027kretprobe_hash_unlock\u0027 - unexpected unlock\n warning: context imbalance in \u0027kretprobe_table_unlock\u0027 - unexpected unlock\n\nSigned-off-by: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nAcked-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nLKML-Reference: \u003c1284512670-2369-6-git-send-email-namhyung@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6376b2297502e72255b7eb2893c6044ad5a7b5f4", "tree": "8ceebb98c5a324580b1e9ce648ded86db2dd85fc", "parents": [ "05662bdb64c746079de7ac4dc4fb4caa5e8e119f" ], "author": { "name": "Namhyung Kim", "email": "namhyung@gmail.com", "time": "Wed Sep 15 10:04:28 2010 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:44:01 2010 +0200" }, "message": "kprobes: Make functions static\n\nMake following (internal) functions static to make sparse\nhappier :-)\n\n * get_optimized_kprobe: only called from static functions\n * kretprobe_table_unlock: _lock function is static\n * kprobes_optinsn_template_holder: never called but holding asm code\n\nSigned-off-by: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nAcked-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nLKML-Reference: \u003c1284512670-2369-4-git-send-email-namhyung@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "05662bdb64c746079de7ac4dc4fb4caa5e8e119f", "tree": "135bb59f626099718f6a325ae1c6a1155015b79e", "parents": [ "edbaadbe42b0b790618ec49d29626223529d8195" ], "author": { "name": "Namhyung Kim", "email": "namhyung@gmail.com", "time": "Wed Sep 15 10:04:27 2010 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:44:01 2010 +0200" }, "message": "kprobes: Verify jprobe entry point\n\nVerify jprobe\u0027s entry point is a function entry point\nusing kallsyms\u0027 offset value.\n\nSigned-off-by: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nAcked-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nLKML-Reference: \u003c1284512670-2369-3-git-send-email-namhyung@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "edbaadbe42b0b790618ec49d29626223529d8195", "tree": "fbd036fe6208249b40ab56f1e68c4efb5b7785d0", "parents": [ "38a81da2205f94e8a2a834b51a6b99c91fc7c2e8" ], "author": { "name": "Namhyung Kim", "email": "namhyung@gmail.com", "time": "Wed Sep 15 10:04:26 2010 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:44:00 2010 +0200" }, "message": "kprobes: Remove redundant address check\n\nRemove call to kernel_text_address() in register_jprobes()\nbecause it is called right after in register_kprobe().\n\nSigned-off-by: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nAcked-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nLKML-Reference: \u003c1284512670-2369-2-git-send-email-namhyung@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "38a81da2205f94e8a2a834b51a6b99c91fc7c2e8", "tree": "5227c665f37d1c472608a44aaad0a04be68befb2", "parents": [ "2ebd4ffb6d0cb877787b1e42be8485820158857e" ], "author": { "name": "Matt Helsley", "email": "matthltc@us.ibm.com", "time": "Mon Sep 13 13:01:20 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:44:00 2010 +0200" }, "message": "perf events: Clean up pid passing\n\nThe kernel perf event creation path shouldn\u0027t use find_task_by_vpid()\nbecause a vpid exists in a specific namespace. find_task_by_vpid() uses\ncurrent\u0027s pid namespace which isn\u0027t always the correct namespace to use\nfor the vpid in all the places perf_event_create_kernel_counter() (and\nthus find_get_context()) is called.\n\nThe goal is to clean up pid namespace handling and prevent bugs like:\n\n\thttps://bugzilla.kernel.org/show_bug.cgi?id\u003d17281\n\nInstead of using pids switch find_get_context() to use task struct\npointers directly. The syscall is responsible for resolving the pid to\na task struct. This moves the pid namespace resolution into the syscall\nmuch like every other syscall that takes pid parameters.\n\nSigned-off-by: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Robin Green \u003cgreenrd@greenrd.org\u003e\nCc: Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nLKML-Reference: \u003ca134e5e392ab0204961fd1a62c84a222bf5874a9.1284407763.git.matthltc@us.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "2ebd4ffb6d0cb877787b1e42be8485820158857e", "tree": "21db710a8f3de28f9554674e947da796a23d2e92", "parents": [ "d958077d007d98125766d11e82da2fd6497b91d6" ], "author": { "name": "Matt Helsley", "email": "matthltc@us.ibm.com", "time": "Mon Sep 13 13:01:19 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:44:00 2010 +0200" }, "message": "perf events: Split out task search into helper\n\nSplit out the code which searches for non-exiting tasks into its own\nhelper. Creating this helper not only makes the code slightly more\nreadable it prepares to move the search out of find_get_context() in\na subsequent commit.\n\nSigned-off-by: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Robin Green \u003cgreenrd@greenrd.org\u003e\nCc: Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nLKML-Reference: \u003c561205417b450b8a4bf7488374541d64b4690431.1284407762.git.matthltc@us.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "d958077d007d98125766d11e82da2fd6497b91d6", "tree": "c71106f6308a16bd50fc3f58338025c7848e5ec1", "parents": [ "64a48d90149bb7007275fac13eaa4cb8d8ce12ea" ], "author": { "name": "Matt Helsley", "email": "matthltc@us.ibm.com", "time": "Mon Sep 13 13:01:18 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:43:59 2010 +0200" }, "message": "hw breakpoints: Fix pid namespace bug\n\nHardware breakpoints can\u0027t be registered within pid namespaces\nbecause tsk-\u003epid is passed rather than the pid in the current\nnamespace.\n\n(See https://bugzilla.kernel.org/show_bug.cgi?id\u003d17281 )\n\nThis is a quick fix demonstrating the problem but is not the\nbest method of solving the problem since passing pids internally\nis not the best way to avoid pid namespace bugs. Subsequent patches\nwill show a better solution.\n\nMuch thanks to Frederic Weisbecker \u003cfweisbec@gmail.com\u003e for doing the\nbulk of the work finding this bug.\n\nSigned-off-by: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Robin Green \u003cgreenrd@greenrd.org\u003e\nCc: Prasad \u003cprasad@linux.vnet.ibm.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Mahesh Salgaonkar \u003cmahesh@linux.vnet.ibm.com\u003e\nLKML-Reference: \u003cf63454af09fb1915717251570423eb9ddd338340.1284407762.git.matthltc@us.ibm.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "d9ca07a05ce1c42ac9717e54eaea4546a3a80978", "tree": "a6200b56afa330bf2b4b61d2485c44362a0f0c80", "parents": [ "3aabae7d9dfaed60effe93662f02c19bafc18537" ], "author": { "name": "Stephane Eranian", "email": "eranian@google.com", "time": "Tue Sep 14 15:34:01 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:43:58 2010 +0200" }, "message": "watchdog: Avoid kernel crash when disabling watchdog\n\nIn case you boot with the watchdog disabled, i.e., nowatchdog, then,\nif you try to disable it via /proc/sys/kernel/watchdog, you get\na kernel crash. The reason is that you are trying to cancel a hrtimer\nwhich has never been initialized.\n\nThis patch fixes this by skipping execution of\nwatchdog_disable_all_cpus() when the watchdog is marked\ndisabled from boot.\n\nSigned-off-by: Stephane Eranian \u003ceranian@google.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c4c8f7a23.cae9d80a.2c11.0bb4@mx.google.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "3aabae7d9dfaed60effe93662f02c19bafc18537", "tree": "af94cdd69add07601d9f3f5988dfc1dc255e3886", "parents": [ "79e406d7b00ab2b261ae32a59f266fd3b7af6f29", "57c072c7113f54f9512624d6c665db6184448782" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:27:31 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 15 10:27:31 2010 +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": "79e406d7b00ab2b261ae32a59f266fd3b7af6f29", "tree": "e1f635e807691cb634fd63478861938592f226fa", "parents": [ "b304d0441a4118fadd4c3f16e4dc600c271030b5" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Sep 14 22:19:46 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Sep 14 22:19:46 2010 -0400" }, "message": "tracing: Remove leftover FTRACE_ENABLE/DISABLE_MCOUNT enums\n\nThe enums for FTRACE_ENABLE_MCOUNT and FTRACE_DISABLE_MCOUNT were\nused as commands to ftrace_run_update_code(). But these commands\nwere used by the old nasty ftrace daemon that has long been slain.\n\nThis is a clean up patch to remove the references to these enums\nand simplify the code a little.\n\nReported-by: Wu Zhangjin \u003cwuzhangjin@gmail.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "b304d0441a4118fadd4c3f16e4dc600c271030b5", "tree": "ed477c965cf6eaf852f69f7dd855c0ea83f8e36d", "parents": [ "2bd16212b8eb86f9574e78d6605a5ba9e9aa8c4e" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Sep 14 18:58:33 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Sep 14 20:18:07 2010 -0400" }, "message": "tracing: Do not trace in irq when funcgraph-irq option is zero\n\nWhen the function graph tracer funcgraph-irq option is zero, disable\ntracing in IRQs. This makes the option have two effects.\n\n1) When reading the trace file, do not display the functions that\n happen in interrupt context (when detected)\n\n2) [*new*] When recording a trace, skip those that are detected\n to be in interrupt by the \u0027in_irq()\u0027 function\n\nNote, in_irq() is updated at irq_enter() and irq_exit(). There are\nstill functions that are recorded by the function graph tracer that\nis in interrupt context but outside the irq_enter/exit() routines.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "2bd16212b8eb86f9574e78d6605a5ba9e9aa8c4e", "tree": "dc26de82f9830265eef31d9eebffce22f0ef632c", "parents": [ "469917ce8717b9f8c5298bf279fa138859baab8d" ], "author": { "name": "Jiri Olsa", "email": "jolsa@redhat.com", "time": "Tue Sep 07 16:53:44 2010 +0200" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Sep 14 20:18:07 2010 -0400" }, "message": "tracing: Add funcgraph-irq option for function graph tracer.\n\nIt\u0027s handy to be able to disable the irq related output\nand not to have to jump over each irq related code, when\nyou have no interrest in it.\n\nThe option is by default enabled, so there\u0027s no change to\ncurrent behaviour. It affects only the final output, so all\nthe irq related data stay in the ring buffer.\n\nSigned-off-by: Jiri Olsa \u003cjolsa@redhat.com\u003e\nLKML-Reference: \u003c20100907145344.GC1912@jolsa.brq.redhat.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "57c072c7113f54f9512624d6c665db6184448782", "tree": "c005a9325d308763bd1763853395c7b13010b5e3", "parents": [ "98c4fd046f07156ca6055677e8f03d4280be16c1" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Tue Sep 14 11:21:11 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Sep 14 15:14:20 2010 -0400" }, "message": "tracing: Fix reading of set_ftrace_filter across lists\n\nIf we do:\n\n # cd /sys/kernel/debug\n # echo \u0027do_IRQ:traceon schedule:traceon sys_write:traceon\u0027 \u003e \\\n set_ftrace_filter\n # cat set_ftrace_filter\n\nWe get the following output:\n\n #### all functions enabled ####\n sys_write:traceon:unlimited\n schedule:traceon:unlimited\n do_IRQ:traceon:unlimited\n\nThis outputs two lists. One is the fact that all functions are\ncurrently enabled for function tracing, the other has three probed\nfunctions, which happen to have \u0027traceon\u0027 as their commands.\n\nCurrently, when reading the first list (functions enabled) the\nseq_file code will receive a \"NULL\" from the t_next() function\ncausing it to exit early. This makes \"read()\" from userspace stop\nreading the code at this boarder. Although read is allowed to do this,\nsome (broken) applications might consider this an end of file and\nstop early.\n\nThis patch adds the start of the second list to t_next() when it\nfinishes the first list. It is a simple change and gives the\nset_ftrace_filter file nicer reading ability.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "98c4fd046f07156ca6055677e8f03d4280be16c1", "tree": "bf461479713dbbaf79b0bf1a50a3ba0f30a2f17c", "parents": [ "4aeb69672d011fac5c8df671f3ca89f7987c104e" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Fri Sep 10 11:47:43 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Sep 14 14:46:01 2010 -0400" }, "message": "tracing: Keep track of set_ftrace_filter position and allow lseek again\n\nThis patch keeps track of the index within the elements of\nset_ftrace_filter and if the position goes backwards, it nicely\nresets and starts from the beginning again.\n\nThis allows for lseek and pread to work properly now.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "4aeb69672d011fac5c8df671f3ca89f7987c104e", "tree": "d2a96af23b9d6ac742725bb17aafe3d4b377cb6a", "parents": [ "2bccfffd1538f3523847583213567e2f7ce00926" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Sep 09 10:00:28 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Sep 14 11:42:30 2010 -0400" }, "message": "tracing: Replace typecasted void pointer in set_ftrace_filter code\n\nThe set_ftrace_filter uses seq_file and reads from two lists. The\npointer returned by t_next() can either be of type struct dyn_ftrace\nor struct ftrace_func_probe. If there is a bug (there was one)\nthe wrong pointer may be used and the reference can cause an oops.\n\nThis patch makes t_next() and friends only return the iterator structure\nwhich now has a pointer of type struct dyn_ftrace and struct\nftrace_func_probe. The t_show() can now test if the pointer is NULL or\nnot and if the pointer exists, it is guaranteed to be of the correct type.\n\nNow if there\u0027s a bug, only wrong data will be shown but not an oops.\n\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "2bccfffd1538f3523847583213567e2f7ce00926", "tree": "7062e0bfc46f66efa2ec3231a6c718a901a0a80c", "parents": [ "bfa88ea7ee9e6b4fd673e45a8cc0a8e0b7ef4761" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Thu Sep 09 08:43:22 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Sep 14 11:42:29 2010 -0400" }, "message": "tracing: Do not reset *pos in set_ftrace_filter\n\nAfter the filtered functions are read, the probed functions are read\nfrom the hash in set_ftrace_filter. When the hashed probed functions\nare read, the *pos passed in is reset. Instead of modifying the pos\ngiven to the read function, just record the pos where the filtered\nfunctions ended and subtract from that.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "0bf377bbb0bea6130f35613491887cc622e42a8b", "tree": "1ecb56fb6195dcdb673ef3a08390b98e54f4f726", "parents": [ "49553c2ef88749dd502687f4eb9c258bb10a4f44" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Sep 12 08:14:52 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Sep 13 20:17:11 2010 +0200" }, "message": "sched: Improve latencies under load by decreasing minimum scheduling granularity\n\nMathieu reported bad latencies with make -j10 kind of kbuild\nworkloads - which is mostly caused by us scheduling with a\ntoo coarse granularity.\n\nReduce the minimum granularity some more, to make sure we\ncan meet the latency target.\n\nI got the following results (make -j10 kbuild load, average of 3\nruns):\n\n vanilla:\n\n maximum latency: 38278.9 µs\n average latency: 7730.1 µs\n\n patched:\n\n maximum latency: 22702.1 µs\n average latency: 6684.8 µs\n\nMathieu also measured it:\n\n|\n| * wakeup-latency.c (SIGEV_THREAD) with make -j10\n|\n| - Mainline 2.6.35.2 kernel\n|\n| maximum latency: 45762.1 µs\n| average latency: 7348.6 µs\n|\n| - With only Peter\u0027s smaller min_gran (shown below):\n|\n| maximum latency: 29100.6 µs\n| average latency: 6684.1 µs\n|\n\nReported-by: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nReported-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nAcked-by: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nSuggested-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003cAANLkTi\u003d8m4g01wZPacySoF7U0PevTNVgJoZZrHiUD-pN@mail.gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "0c67b40872326a5340cab51d79a192a5fbaeb484", "tree": "e92b420dcb1375e159842d8ffa03a5230976ab3a", "parents": [ "cde8e88498c8de69271fcb6d4dd974979368fa67" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Sep 13 11:15:58 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Sep 13 17:08:42 2010 +0200" }, "message": "perf: Fix free_event()\n\nWith the context rework stuff we can actually end up freeing an event\nbefore it gets attached to a context.\n\nReported-by: Cyrill Gorcunov \u003cgorcunov@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "cde8e88498c8de69271fcb6d4dd974979368fa67", "tree": "34eb745cc6f3e5a5dbe0918f4920424be70bcfff", "parents": [ "b0b2072df3b544f56b90173c2cde7a374c51546b" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Sep 13 11:06:55 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Sep 13 17:08:42 2010 +0200" }, "message": "perf: Sanitize the RCU logic\n\nSimplify things and simply synchronize against two RCU variants for\nPMU unregister -- we don\u0027t care about performance, its module unload\nif anything.\n\nReported-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "84e1d836ef0759a152578a961894824bde89596f", "tree": "47c439bfdc9e5ea91f9a71235d336257555fad78", "parents": [ "20f4cad6b247160055915db4f4aaeda82e6c50ed", "6715045ddc7472a22be5e49d4047d2d89b391f45" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Sep 11 15:50:53 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Sep 11 15:50:53 2010 -0700" }, "message": "Merge branch \u0027pm-fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6\n\n* \u0027pm-fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:\n PM / Hibernate: Avoid hitting OOM during preallocation of memory\n PM QoS: Correct pr_debug() misuse and improve parameter checks\n PM: Prevent waiting forever on asynchronous resume after failing suspend\n" }, { "commit": "6715045ddc7472a22be5e49d4047d2d89b391f45", "tree": "d9a48095e915407f6d54db29cfce44c201ae9cef", "parents": [ "0109c2c48d062a04685638926a35ed20153fedc8" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Sat Sep 11 20:58:27 2010 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Sat Sep 11 21:03:53 2010 +0200" }, "message": "PM / Hibernate: Avoid hitting OOM during preallocation of memory\n\nThere is a problem in hibernate_preallocate_memory() that it calls\npreallocate_image_memory() with an argument that may be greater than\nthe total number of available non-highmem memory pages. If that\u0027s\nthe case, the OOM condition is guaranteed to trigger, which in turn\ncan cause significant slowdown to occur during hibernation.\n\nTo avoid that, make preallocate_image_memory() adjust its argument\nbefore calling preallocate_image_pages(), so that the total number of\nsaveable non-highem pages left is not less than the minimum size of\na hibernation image. Change hibernate_preallocate_memory() to try to\nallocate from highmem if the number of pages allocated by\npreallocate_image_memory() is too low.\n\nModify free_unnecessary_pages() to take all possible memory\nallocation patterns into account.\n\nReported-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nTested-by: M. Vefa Bicakci \u003cbicave@superonline.com\u003e\n" }, { "commit": "aad1830e6b978f5d90e5d81d071e1752f526f732", "tree": "af5ba1a5ce1574201e4b4da0366a19a4149e0f8c", "parents": [ "3e6dce76d99b328716b43929b9195adfee1de00c", "55496c896b8a695140045099d4e0175cf09d4eae" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Sep 11 07:59:49 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Sep 11 07:59:49 2010 -0700" }, "message": "Merge branch \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n x86, tsc: Fix a preemption leak in restore_sched_clock_state()\n sched: Move sched_avg_update() to update_cpu_load()\n" }, { "commit": "0109c2c48d062a04685638926a35ed20153fedc8", "tree": "8e86dfb97b555845e99d379af6d716d5fb0ecb10", "parents": [ "152e1d592071c8b312bb898bc1118b64e4aea535" ], "author": { "name": "mark gross", "email": "markgross@thegnar.org", "time": "Thu Sep 09 23:20:09 2010 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Sat Sep 11 00:53:05 2010 +0200" }, "message": "PM QoS: Correct pr_debug() misuse and improve parameter checks\n\nCorrect some pr_debug() misuse and add a stronger parameter check to\npm_qos_write() for the ASCII hex value case. Thanks to Dan Carpenter\nfor pointing out the problem!\n\nSigned-off-by: mark gross \u003cmarkgross@thegnar.org\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\n" }, { "commit": "e5f4d3394a52ac351f1a479fe136d92fa5228eff", "tree": "57adeb66c5e98bf86613c15295e07cbb07952be3", "parents": [ "cee010ec5211b96f33c5c2208f5c14ebb04b634a" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Sep 10 17:38:06 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Sep 10 17:41:55 2010 +0200" }, "message": "perf: Fix perf_init_event()\n\nWe ought to return -ENOENT when non of the registered PMUs\nrecognise the requested event.\n\nThis fixes a boot crash that occurs if no PMU is available\nbut the NMI watchdog tries to register an event.\n\nReported-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f2955b490b249ca56e465fd32cc355f84aedf8bd", "tree": "401faf98c61f4a0a65703644277521a10da98eec", "parents": [ "3d96406c7da1ed5811ea52a3b0905f4f0e295376", "9efdda310cb26bdc28429cb831c3ec5fa270feb7" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Sep 10 07:31:24 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Sep 10 07:31:24 2010 -0700" }, "message": "Merge branch \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n tracing: t_start: reset FTRACE_ITER_HASH in case of seek/pread\n perf symbols: Fix multiple initialization of symbol system\n perf: Fix CPU hotplug\n perf, trace: Fix module leak\n tracing/kprobe: Fix handling of C-unlike argument names\n tracing/kprobes: Fix handling of argument names\n perf probe: Fix handling of arguments names\n perf probe: Fix return probe support\n tracing/kprobe: Fix a memory leak in error case\n tracing: Do not allow llseek to set_ftrace_filter\n" }, { "commit": "cee010ec5211b96f33c5c2208f5c14ebb04b634a", "tree": "dae35fd772d7e18db94b320a0ffc97e55e719d0e", "parents": [ "3b8fad3e2f5f69bfd8e42d099ca8582fb2342edf" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Sep 10 12:51:54 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Sep 10 16:24:33 2010 +0200" }, "message": "perf: Ensure we call add_event_to_ctx() with the right locks held\n\nEven though we call it from the inherit path, where the child is\nnot yet accessible, we need to hold ctx-\u003elock, add_event_to_ctx()\nassumes IRQs are disabled.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "df09162550fbb53354f0c88e85b5d0e6129ee9cc", "tree": "e8ba6014c442cf72d587948733f8c29e0d330925", "parents": [ "5e11637e2c929e34dcc0fbbfb48bdb638937701a" ], "author": { "name": "Chris Wright", "email": "chrisw@sous-sol.org", "time": "Thu Sep 09 16:34:59 2010 -0700" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Thu Sep 09 22:43:49 2010 -0400" }, "message": "tracing: t_start: reset FTRACE_ITER_HASH in case of seek/pread\n\nBe sure to avoid entering t_show() with FTRACE_ITER_HASH set without\nhaving properly started the iterator to iterate the hash. This case is\ndegenerate and, as discovered by Robert Swiecki, can cause t_hash_show()\nto misuse a pointer. This causes a NULL ptr deref with possible security\nimplications. Tracked as CVE-2010-3079.\n\nCc: Robert Swiecki \u003cswiecki@google.com\u003e\nCc: Eugene Teo \u003ceugene@redhat.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Chris Wright \u003cchrisw@sous-sol.org\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "910321ea817a202ff70fac666e37e2c8e2f88823", "tree": "aaead29e7797986e2b804746b565bb5d05117c54", "parents": [ "ac8456d6f9a3011c824176bd6084d39e5f70a382" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Thu Sep 09 16:38:07 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 09 18:57:25 2010 -0700" }, "message": "swap: revert special hibernation allocation\n\nPlease revert 2.6.36-rc commit d2997b1042ec150616c1963b5e5e919ffd0b0ebf\n\"hibernation: freeze swap at hibernation\". It complicated matters by\nadding a second swap allocation path, just for hibernation; without in any\nway fixing the issue that it was intended to address - page reclaim after\nfixing the hibernation image might free swap from a page already imaged as\nswapcache, letting its swap be reallocated to store a different page of\nthe image: resulting in data corruption if the imaged page were freed as\nclean then swapped back in. Pages freed to si-\u003eswap_map were still in\ndanger of being reallocated by the alternative allocation path.\n\nI guess it inadvertently fixed slow SSD swap allocation for hibernation,\nas reported by Nigel Cunningham: by missing out the discards that occur on\nthe usual swap allocation path; but that was unintentional, and needs a\nseparate fix.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nCc: Ondrej Zary \u003clinux@rainbow-software.org\u003e\nCc: Andrea Gelmini \u003candrea.gelmini@gmail.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Nigel Cunningham \u003cnigel@tuxonice.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1c24de60e50fb19b94d94225458da17c720f0729", "tree": "a225907a1b341f629037805f086add137e176f4a", "parents": [ "94131e174fedd9f3f9bb148cee4be12f2d46d68e" ], "author": { "name": "Jerome Marchand", "email": "jmarchan@redhat.com", "time": "Thu Sep 09 16:37:59 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 09 18:57:24 2010 -0700" }, "message": "kernel/groups.c: fix integer overflow in groups_search\n\ngid_t is a unsigned int. If group_info contains a gid greater than\nMAX_INT, groups_search() function may look on the wrong side of the search\ntree.\n\nThis solves some unfair \"permission denied\" problems.\n\nSigned-off-by: Jerome Marchand \u003cjmarchan@redhat.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "31583bb0cf6cc40f2a468a4d2f3b9cbefd24f891", "tree": "1c9ff4ff83ef80fe0b9b5d6fa7ec9af1ebbc2209", "parents": [ "ed430fec756ad65f7cfba24f8ad17c3d5a403290" ], "author": { "name": "Michael S. Tsirkin", "email": "mst@redhat.com", "time": "Thu Sep 09 16:37:37 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 09 18:57:23 2010 -0700" }, "message": "cgroups: fix API thinko\n\nAdd cgroup_attach_task_all()\n\nThe existing cgroup_attach_task_current_cg() API is called by a thread to\nattach another thread to all of its cgroups; this is unsuitable for cases\nwhere a privileged task wants to attach itself to the cgroups of a less\nprivileged one, since the call must be made from the context of the target\ntask.\n\nThis patch adds a more generic cgroup_attach_task_all() API that allows\nboth the source task and to-be-moved task to be specified.\ncgroup_attach_task_current_cg() becomes a specialization of the more\ngeneric new function.\n\n[menage@google.com: rewrote changelog]\n[akpm@linux-foundation.org: address reviewer comments]\nSigned-off-by: Michael S. Tsirkin \u003cmst@redhat.com\u003e\nTested-by: Alex Williamson \u003calex.williamson@redhat.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Ben Blum \u003cbblum@google.com\u003e\nCc: Sridhar Samudrala \u003csri@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "85a0fdfd0f967507f3903e8419bc7e408f5a59de", "tree": "2b430fc9689701f8b6da8bd9fa83feda8b6d972c", "parents": [ "2f327dad14aa8bc939a4f0a2d3fdcf64a2d8c09e" ], "author": { "name": "Peter Oberparleiter", "email": "oberpar@linux.vnet.ibm.com", "time": "Thu Sep 09 16:37:35 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 09 18:57:23 2010 -0700" }, "message": "gcov: fix null-pointer dereference for certain module types\n\nThe gcov-kernel infrastructure expects that each object file is loaded\nonly once. This may not be true, e.g. when loading multiple kernel\nmodules which are linked to the same object file. As a result, loading\nsuch kernel modules will result in incorrect gcov results while unloading\nwill cause a null-pointer dereference.\n\nThis patch fixes these problems by changing the gcov-kernel infrastructure\nso that multiple profiling data sets can be associated with one debugfs\nentry. It applies to 2.6.36-rc1.\n\nSigned-off-by: Peter Oberparleiter \u003coberpar@linux.vnet.ibm.com\u003e\nReported-by: Werner Spies \u003cwerner.spies@thalesgroup.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4e231c7962ce711c7d8c2a4dc23ecd1e8fc28363", "tree": "05af30e5c2f1084d8e77c89f0e55beaafa2194c0", "parents": [ "1b9a644fece117cfa5474a2388d6b89d1baf8ddf" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Sep 09 21:01:59 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 21:07:09 2010 +0200" }, "message": "perf: Fix up delayed_put_task_struct()\n\nI missed a perf_event_ctxp user when converting it to an array. Pull this\nlast user into perf_event.c as well and fix it up.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "1b9a644fece117cfa5474a2388d6b89d1baf8ddf", "tree": "c89be6de269578501a365f7526a81fb64cb6ba93", "parents": [ "89a1e18731959e9953fae15ddc1a983eb15a4f19" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Sep 07 18:32:22 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:34 2010 +0200" }, "message": "perf: Optimize context ops\n\nAssuming we don\u0027t mix events of different pmus onto a single context\n(with the exeption of software events inside a hardware group) we can\nnow assume that all events on a particular context belong to the same\npmu, hence we can disable the pmu for the entire context operations.\n\nThis reduces the amount of hardware writes.\n\nThe exception for swevents comes from the fact that the sw pmu disable\nis a nop.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "89a1e18731959e9953fae15ddc1a983eb15a4f19", "tree": "5a52e77acb23f47254c94e23eb6ed35a422fce1d", "parents": [ "8dc85d547285668e509f86c177bcd4ea055bcaaf" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Sep 07 17:34:50 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:34 2010 +0200" }, "message": "perf: Provide a separate task context for swevents\n\nSince software events are always schedulable, mixing them up with\nhardware events (who are not) can lead to funny scheduling oddities.\n\nGiving them their own context solves this.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8dc85d547285668e509f86c177bcd4ea055bcaaf", "tree": "5474dd6c31952b342f0a3f1bcec09e3049129264", "parents": [ "eb184479874238393ac186c4e054d24311c34aaa" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Sep 02 16:50:03 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:33 2010 +0200" }, "message": "perf: Multiple task contexts\n\nProvide the infrastructure for multiple task contexts.\n\nA more flexible approach would have resulted in more pointer chases\nin the scheduling hot-paths. This approach has the limitation of a\nstatic number of task contexts.\n\nSince I expect most external PMUs to be system wide, or at least node\nwide (as per the intel uncore unit) they won\u0027t actually need a task\ncontext.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "eb184479874238393ac186c4e054d24311c34aaa", "tree": "ac7206becfb3e0d18600252d8f5aa15478c32390", "parents": [ "97dee4f3206622f31396dede2b5ddb8670458f56" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Sep 07 15:55:13 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:33 2010 +0200" }, "message": "perf: Clean up perf_event_context allocation\n\nUnify the two perf_event_context allocation sites.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "97dee4f3206622f31396dede2b5ddb8670458f56", "tree": "0698df23dc32aa44cfc75968163825841c534160", "parents": [ "108b02cfce04ee90b0a07ee0b104baffd39f5934" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Sep 07 15:35:33 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:33 2010 +0200" }, "message": "perf: Move some code around\n\nMove all inherit code near each other.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "108b02cfce04ee90b0a07ee0b104baffd39f5934", "tree": "e209d5fe01cda90df2cc0241c6247fd934cc5087", "parents": [ "b5ab4cd563e7ab49b27957704112a8ecade54e1f" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Sep 06 14:32:03 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:32 2010 +0200" }, "message": "perf: Per-pmu-per-cpu contexts\n\nAllocate per-cpu contexts per pmu.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "b5ab4cd563e7ab49b27957704112a8ecade54e1f", "tree": "a5d1194e001a1203c679e1f0014d3b40118a725d", "parents": [ "b28ab83c595e767f2028276b7398d17f2253cec0" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Sep 06 16:32:21 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:32 2010 +0200" }, "message": "perf: Per cpu-context rotation timer\n\nGive each cpu-context its own timer so that it is a self contained\nentity, this eases the way for per-pmu-per-cpu contexts as well as\nprovides the basic infrastructure to allow different rotation\ntimes per pmu.\n\nThings to look at:\n - folding the tick and these TICK_NSEC timers\n - separate task context rotation\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "b28ab83c595e767f2028276b7398d17f2253cec0", "tree": "ae52b2d4c10d1317ec7a5906bea56847e95b5f43", "parents": [ "c3f00c70276d8ae82578c8b773e2db657f69a478" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Sep 06 14:48:15 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:32 2010 +0200" }, "message": "perf: Remove the swevent hash-table from the cpu context\n\nSeparate the swevent hash-table from the cpu_context bits in\npreparation for per pmu cpu contexts.\n\nThis keeps the swevent hash a global entity.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "c3f00c70276d8ae82578c8b773e2db657f69a478", "tree": "d941c7ffd4ca6918140690023a2611be3b055006", "parents": [ "15ac9a395a753cb28c674e7ea80386ffdff21785" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Aug 18 14:37:15 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:31 2010 +0200" }, "message": "perf: Separate find_get_context() from event initialization\n\nSeparate find_get_context() from the event allocation and\ninitialization so that we may make find_get_context() depend\non the event pmu in a later patch.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "15ac9a395a753cb28c674e7ea80386ffdff21785", "tree": "63879e3031a6ed8e372ffd254ef97ff703a4d478", "parents": [ "a4eaf7f14675cb512d69f0c928055e73d0c6d252" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Sep 06 15:51:45 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:31 2010 +0200" }, "message": "perf: Remove the sysfs bits\n\nNeither the overcommit nor the reservation sysfs parameter were\nactually working, remove them as they\u0027ll only get in the way.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "a4eaf7f14675cb512d69f0c928055e73d0c6d252", "tree": "e8a0f631fc28d4bd9becd2e9e2c71743c64ee3ec", "parents": [ "fa407f35e0298d841e4088f95a7f9cf6e725c6d5" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Jun 16 14:37:10 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:30 2010 +0200" }, "message": "perf: Rework the PMU methods\n\nReplace pmu::{enable,disable,start,stop,unthrottle} with\npmu::{add,del,start,stop}, all of which take a flags argument.\n\nThe new interface extends the capability to stop a counter while\nkeeping it scheduled on the PMU. We replace the throttled state with\nthe generic stopped state.\n\nThis also allows us to efficiently stop/start counters over certain\ncode paths (like IRQ handlers).\n\nIt also allows scheduling a counter without it starting, allowing for\na generic frozen state (useful for rotating stopped counters).\n\nThe stopped state is implemented in two different ways, depending on\nhow the architecture implemented the throttled state:\n\n 1) We disable the counter:\n a) the pmu has per-counter enable bits, we flip that\n b) we program a NOP event, preserving the counter state\n\n 2) We store the counter state and ignore all read/overflow events\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Cyrill Gorcunov \u003cgorcunov@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nCc: Deng-Cheng Zhu \u003cdengcheng.zhu@gmail.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Michael Cree \u003cmcree@orcon.net.nz\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "fa407f35e0298d841e4088f95a7f9cf6e725c6d5", "tree": "8ffb9141278688835de02e1940a8535c54a87cd7", "parents": [ "ad5133b7030d04ce7701aa7cbe98f561347c79c2" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Jun 24 12:35:12 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:30 2010 +0200" }, "message": "perf: Shrink hw_perf_event\n\nUse hw_perf_event::period_left instead of hw_perf_event::remaining\nand win back 8 bytes.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ad5133b7030d04ce7701aa7cbe98f561347c79c2", "tree": "b0593f2cdc40432ad2d91c5eaa9485df328ab97b", "parents": [ "33696fc0d141bbbcb12f75b69608ea83282e3117" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Jun 15 12:22:39 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:30 2010 +0200" }, "message": "perf: Default PMU ops\n\nProvide default implementations for the pmu txn methods, this\nallows us to remove some conditional code.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Cyrill Gorcunov \u003cgorcunov@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nCc: Deng-Cheng Zhu \u003cdengcheng.zhu@gmail.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Michael Cree \u003cmcree@orcon.net.nz\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "33696fc0d141bbbcb12f75b69608ea83282e3117", "tree": "72e08dba377d57eb7dd8c08a937a6de10e8af9c4", "parents": [ "24cd7f54a0d47e1d5b3de29e2456bfbd2d8447b7" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Jun 14 08:49:00 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:29 2010 +0200" }, "message": "perf: Per PMU disable\n\nChanges perf_disable() into perf_pmu_disable().\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Cyrill Gorcunov \u003cgorcunov@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nCc: Deng-Cheng Zhu \u003cdengcheng.zhu@gmail.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Michael Cree \u003cmcree@orcon.net.nz\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "24cd7f54a0d47e1d5b3de29e2456bfbd2d8447b7", "tree": "a37d3a4cb101e3f67635a1920f447c9e9e8d8ab2", "parents": [ "9ed6060d286b1eb55974d09080f442f809408c42" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jun 11 17:32:03 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:29 2010 +0200" }, "message": "perf: Reduce perf_disable() usage\n\nSince the current perf_disable() usage is only an optimization,\nremove it for now. This eases the removal of the __weak\nhw_perf_enable() interface.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Cyrill Gorcunov \u003cgorcunov@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nCc: Deng-Cheng Zhu \u003cdengcheng.zhu@gmail.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Michael Cree \u003cmcree@orcon.net.nz\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9ed6060d286b1eb55974d09080f442f809408c42", "tree": "529961474ca96bef34ec0b75e35fe991aee0e80d", "parents": [ "b0a873ebbf87bf38bf70b5e39a7cadc96099fa13" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jun 11 17:36:35 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:28 2010 +0200" }, "message": "perf: Unindent labels\n\nFixup random annoying style bits.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "b0a873ebbf87bf38bf70b5e39a7cadc96099fa13", "tree": "63ab672b847aed295f99b9b2a3bbcfd5d3d35bd9", "parents": [ "51b0fe39549a04858001922919ab355dee9bdfcf" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jun 11 13:35:08 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:28 2010 +0200" }, "message": "perf: Register PMU implementations\n\nSimple registration interface for struct pmu, this provides the\ninfrastructure for removing all the weak functions.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Cyrill Gorcunov \u003cgorcunov@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nCc: Deng-Cheng Zhu \u003cdengcheng.zhu@gmail.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Michael Cree \u003cmcree@orcon.net.nz\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "51b0fe39549a04858001922919ab355dee9bdfcf", "tree": "024768dd0c87e890edf76e129820ea0cdf16a257", "parents": [ "2aa61274efb9f532deaebc9812675a27af1994cb" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jun 11 13:35:57 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:46:27 2010 +0200" }, "message": "perf: Deconstify struct pmu\n\nsed -ie \u0027s/const struct pmu\\\u003e/struct pmu/g\u0027 `git grep -l \"const struct pmu\\\u003e\"`\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nCc: stephane eranian \u003ceranian@googlemail.com\u003e\nCc: Robert Richter \u003crobert.richter@amd.com\u003e\nCc: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Cyrill Gorcunov \u003cgorcunov@gmail.com\u003e\nCc: Lin Ming \u003cming.m.lin@intel.com\u003e\nCc: Yanmin \u003cyanmin_zhang@linux.intel.com\u003e\nCc: Deng-Cheng Zhu \u003cdengcheng.zhu@gmail.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Michael Cree \u003cmcree@orcon.net.nz\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "2aa61274efb9f532deaebc9812675a27af1994cb", "tree": "c2f70525dc152e0ddce60f1a3021473cc6a3f298", "parents": [ "359d5106a2ff4ffa2ba129ec8f54743c341dabfc", "5e11637e2c929e34dcc0fbbfb48bdb638937701a" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:40:06 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:40:08 2010 +0200" }, "message": "Merge branch \u0027perf/urgent\u0027 into perf/core\n\nMerge reason: Pick up pending fixes before applying dependent new changes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "da2b71edd8a7db44fe1746261410a981f3e03632", "tree": "4c84c8761590138cffb244eb54fb29263175a6cd", "parents": [ "d56557af19867edb8c0e96f8e26399698a08857f" ], "author": { "name": "Suresh Siddha", "email": "suresh.b.siddha@intel.com", "time": "Mon Aug 23 13:42:51 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:39:33 2010 +0200" }, "message": "sched: Move sched_avg_update() to update_cpu_load()\n\nCurrently sched_avg_update() (which updates rt_avg stats in the rq)\nis getting called from scale_rt_power() (in the load balance context)\nwhich doesn\u0027t take rq-\u003elock.\n\nFix it by moving the sched_avg_update() to more appropriate\nupdate_cpu_load() where the CFS load gets updated as well.\n\nSigned-off-by: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1282596171.2694.3.camel@sbsiddha-MOBL3\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "5e11637e2c929e34dcc0fbbfb48bdb638937701a", "tree": "ed782662362ee0ea5ac888588664aeb97e6f1312", "parents": [ "9cb627d5f38830ca19aa0dca52d1d3a633018bf7" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jun 11 13:35:08 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:38:52 2010 +0200" }, "message": "perf: Fix CPU hotplug\n\nSince we have UP_PREPARE, we should also have UP_CANCELED.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus \u003cpaulus@samba.org\u003e\nLKML-Reference: \u003cnew-submission\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9cb627d5f38830ca19aa0dca52d1d3a633018bf7", "tree": "38138b59d5b54c09314a01172586aa653cc3b528", "parents": [ "da34634fd39958725310d2c30c9b4543945f968b" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Wed Sep 01 12:58:43 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Sep 09 20:38:51 2010 +0200" }, "message": "perf, trace: Fix module leak\n\nCommit 1c024eca (perf, trace: Optimize tracepoints by using\nper-tracepoint-per-cpu hlist to track events) caused a module\nrefcount leak.\n\nReported-And-Tested-by: Avi Kivity \u003cavi@redhat.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c4C7E1F12.8030304@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "79637a41e466bbe7dfe394bac3c9d86a92fd55b1", "tree": "0ee720d20572a3e1f901f78331b57612984f1e2e", "parents": [ "899edae615c806f78880077bd46f04d7f23ae6e6", "b3bd3de66f60df4c9a2076e2886a622458929056" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Sep 08 11:13:42 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Sep 08 11:13:42 2010 -0700" }, "message": "Merge branch \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n gcc-4.6: kernel/*: Fix unused but set warnings\n mutex: Fix annotations to include it in kernel-locking docbook\n pid: make setpgid() system call use RCU read-side critical section\n MAINTAINERS: Add RCU\u0027s public git tree\n" }, { "commit": "899edae615c806f78880077bd46f04d7f23ae6e6", "tree": "ae3918d9947a8c4811e86217fc77b3927784492d", "parents": [ "c8c727db413e18414dc6ebc2cc4f18f390763e17", "4177c42a6301a34c20038ec2771a33dcc30bb338" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Sep 08 11:13:16 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Sep 08 11:13:16 2010 -0700" }, "message": "Merge branch \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n perf, x86: Try to handle unknown nmis with an enabled PMU\n perf, x86: Fix handle_irq return values\n perf, x86: Fix accidentally ack\u0027ing a second event on intel perf counter\n oprofile, x86: fix init_sysfs() function stub\n lockup_detector: Sync touch_*_watchdog back to old semantics\n tracing: Fix a race in function profile\n oprofile, x86: fix init_sysfs error handling\n perf_events: Fix time tracking for events with pid !\u003d -1 and cpu !\u003d -1\n perf: Initialize callchains roots\u0027s childen hits\n oprofile: fix crash when accessing freed task structs\n" }, { "commit": "da34634fd39958725310d2c30c9b4543945f968b", "tree": "034fa85a0f8ca36fe0e3caa8803b4a6fbe3b9319", "parents": [ "aba91595cfcebd193425e20aabc407531526a1c5" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Fri Aug 27 20:39:12 2010 +0900" }, "committer": { "name": "Arnaldo Carvalho de Melo", "email": "acme@redhat.com", "time": "Wed Sep 08 11:47:19 2010 -0300" }, "message": "tracing/kprobe: Fix handling of C-unlike argument names\n\nCheck the argument name whether it is invalid (not C-like symbol name). This\nmakes event format simple.\n\nReported-by: Srikar Dronamraju \u003csrikar@linux.vnet.ibm.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nLKML-Reference: \u003c20100827113912.22882.62313.stgit@ltc236.sdl.hitachi.co.jp\u003e\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nSigned-off-by: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\n" }, { "commit": "aba91595cfcebd193425e20aabc407531526a1c5", "tree": "5473ed5aebc93bb0aea03a17d7ed968ca0e95dce", "parents": [ "367e94c10092469c896a226a77ef13cf6da757e4" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Fri Aug 27 20:39:06 2010 +0900" }, "committer": { "name": "Arnaldo Carvalho de Melo", "email": "acme@redhat.com", "time": "Wed Sep 08 11:47:19 2010 -0300" }, "message": "tracing/kprobes: Fix handling of argument names\n\nSet \"argN\" name for each argument automatically if it has no specified name.\nSince dynamic trace event(kprobe_events) accepts special characters for its\nargument, its format can show those special characters (e.g. \u0027$\u0027, \u0027%\u0027, \u0027+\u0027).\nHowever, perf can\u0027t parse those format because of the character (especially\n\u0027%\u0027) mess up the format. This sets \"argX\" name for those arguments if user\nomitted the argument names.\n\nE.g.\n # echo \u0027p do_fork %ax IP\u003d%ip $stack\u0027 \u003e tracing/kprobe_events\n # cat tracing/kprobe_events\n p:kprobes/p_do_fork_0 do_fork arg1\u003d%ax IP\u003d%ip arg3\u003d$stack\n\nReported-by: Srikar Dronamraju \u003csrikar@linux.vnet.ibm.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nLKML-Reference: \u003c20100827113906.22882.59312.stgit@ltc236.sdl.hitachi.co.jp\u003e\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nSigned-off-by: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\n" }, { "commit": "61a527362234ac3352a91ac67c50c6f7cd248eb1", "tree": "6d3ed6390f61d7819c11b459d86d5dac76ca7f0c", "parents": [ "9c55cb12c1c172e2d51e85fbb5a4796ca86b77e7" ], "author": { "name": "Masami Hiramatsu", "email": "masami.hiramatsu.pt@hitachi.com", "time": "Fri Aug 27 20:38:46 2010 +0900" }, "committer": { "name": "Arnaldo Carvalho de Melo", "email": "acme@redhat.com", "time": "Wed Sep 08 11:47:18 2010 -0300" }, "message": "tracing/kprobe: Fix a memory leak in error case\n\nFix a memory leak which happens when a field name conflicts with others. In\nerror case, free_trace_probe() will free all arguments until nr_args, so this\nincrements nr_args the begining of the loop instead of the end.\n\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Mathieu Desnoyers \u003cmathieu.desnoyers@efficios.com\u003e\nLKML-Reference: \u003c20100827113846.22882.12670.stgit@ltc236.sdl.hitachi.co.jp\u003e\nSigned-off-by: Masami Hiramatsu \u003cmasami.hiramatsu.pt@hitachi.com\u003e\nSigned-off-by: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\n" }, { "commit": "9c55cb12c1c172e2d51e85fbb5a4796ca86b77e7", "tree": "0f86d1e27fbfc31cba108e71643d686315468db9", "parents": [ "4177c42a6301a34c20038ec2771a33dcc30bb338" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Wed Sep 08 11:20:37 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed Sep 08 12:08:01 2010 -0400" }, "message": "tracing: Do not allow llseek to set_ftrace_filter\n\nReading the file set_ftrace_filter does three things.\n\n1) shows whether or not filters are set for the function tracer\n2) shows what functions are set for the function tracer\n3) shows what triggers are set on any functions\n\n3 is independent from 1 and 2.\n\nThe way this file currently works is that it is a state machine,\nand as you read it, it may change state. But this assumption breaks\nwhen you use lseek() on the file. The state machine gets out of sync\nand the t_show() may use the wrong pointer and cause a kernel oops.\n\nLuckily, this will only kill the app that does the lseek, but the app\ndies while holding a mutex. This prevents anyone else from using the\nset_ftrace_filter file (or any other function tracing file for that matter).\n\nA real fix for this is to rewrite the code, but that is too much for\na -rc release or stable. This patch simply disables llseek on the\nset_ftrace_filter() file for now, and we can do the proper fix for the\nnext major release.\n\nReported-by: Robert Swiecki \u003cswiecki@google.com\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: Tavis Ormandy \u003ctaviso@google.com\u003e\nCc: Eugene Teo \u003ceugene@redhat.com\u003e\nCc: vendor-sec@lst.de\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "cd4d4fc4137502f88ee871fc015a934dc28535e3", "tree": "09dfa0627996ca80d0fcc936b6fbd5080ee6e9d7", "parents": [ "608307e6de2631e37f55f106a7cbbc560cb12751", "9c37547ab62f88aac3e1e3c2065b611f811de9b5" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 07 14:08:17 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 07 14:08:17 2010 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:\n workqueue: use zalloc_cpumask_var() for gcwq-\u003emayday_mask\n workqueue: fix GCWQ_DISASSOCIATED initialization\n workqueue: Add a workqueue chapter to the tracepoint docbook\n workqueue: fix cwq-\u003enr_active underflow\n workqueue: improve destroy_workqueue() debuggability\n workqueue: mark lock acquisition on worker_maybe_bind_and_lock()\n workqueue: annotate lock context change\n workqueue: free rescuer on destroy_workqueue\n" }, { "commit": "b3bd3de66f60df4c9a2076e2886a622458929056", "tree": "d0b1fa885acfa96536cf74f487acb28d63442b83", "parents": [ "ef5dc121d5a0bb1fa477c5395277259f07d318a3" ], "author": { "name": "Andi Kleen", "email": "andi@firstfloor.org", "time": "Tue Aug 10 14:17:51 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Sep 05 14:36:58 2010 +0200" }, "message": "gcc-4.6: kernel/*: Fix unused but set warnings\n\nNo real bugs I believe, just some dead code.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: andi@firstfloor.org\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ef5dc121d5a0bb1fa477c5395277259f07d318a3", "tree": "5af1d24406aa014eed72f07097316ba6f7d0d04f", "parents": [ "950eaaca681c44aab87a46225c9e44f902c080aa" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Thu Sep 02 15:48:16 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Sep 03 08:19:51 2010 +0200" }, "message": "mutex: Fix annotations to include it in kernel-locking docbook\n\nFix kernel-doc notation in linux/mutex.h and kernel/mutex.c,\nthen add these 2 files to the kernel-locking docbook as the\nMutex API reference chapter.\n\nAdd one API function to mutex-design.txt and correct a typo in\nthat file.\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nLKML-Reference: \u003c20100902154816.6cc2f9ad.randy.dunlap@oracle.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "f6195aa09e618d712f52bf4fa33b5293820eb93d", "tree": "a41ef0dce7ebb3e670b6e1a7214a4f558110178e", "parents": [ "c9cf4a019cff198ee5638323e3b0ee18886467e8" ], "author": { "name": "Steven Rostedt", "email": "srostedt@redhat.com", "time": "Wed Sep 01 12:23:12 2010 -0400" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Wed Sep 01 12:23:12 2010 -0400" }, "message": "ring-buffer: Place duplicate expression into a single function\n\nWhile discussing the strictness of the 80 character limit on the\nKernel Summit Discussion mailing list, I showed examples that I\nbroke that limit slightly with some algorithms. In discussing with\nJohn Linville, what looked better, I realized that two of the\n80 char breaking culprits were an identical expression.\n\nAs a clean up, this patch moves the identical expression into its\nown helper function and that is used instead. As a side effect,\nthe offending code is now under the 80 character limit. :-)\n\nThis clean up code also changes the expression from\n\n\t(A - B) - C to A - (B + C)\n\nThis makes the code look a little nicer too.\n\nCc: John W. Linville \u003clinville@tuxdriver.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "68d3f1d810500e8b975bdf0b20dd83d060076b4b", "tree": "68d07e9d165aa9fde390dfa5694bb58aa63adb0d", "parents": [ "3aaba20f26f58843e8f20611e5c0b1c06954310f" ], "author": { "name": "Don Zickus", "email": "dzickus@redhat.com", "time": "Tue Aug 31 23:00:07 2010 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 01 10:02:28 2010 +0200" }, "message": "lockup_detector: Sync touch_*_watchdog back to old semantics\n\nDuring my rewrite, the semantics of touch_nmi_watchdog and\ntouch_softlockup_watchdog changed enough to break some drivers\n(mostly over preemptable regions).\n\nThese are cases where long delays on one CPU (due to\nprint_delay for example) can cause long delays on other\nCPUs - so we must \u0027touch\u0027 the nmi_watchdog flag of those\nother CPUs as well.\n\nThis change brings those touch_*_watchdog() functions back in line\nwith to how they used to work.\n\nSigned-off-by: Don Zickus \u003cdzickus@redhat.com\u003e\nAcked-by: Cyrill Gorcunov \u003cgorcunov@openvz.org\u003e\nCc: peterz@infradead.org\nCc: fweisbec@gmail.com\nLKML-Reference: \u003c1283310009-22168-2-git-send-email-dzickus@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "14416c35b6b9975c9593d7ecc8382d1ecaa0b598", "tree": "15083ac26721ae79cf9f2348c2c5e206a5674f35", "parents": [ "eac243355a99d6b9d41bbeba4fc83e7f735485f9" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Tue Aug 31 23:00:09 2010 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 01 07:33:34 2010 +0200" }, "message": "lockup_detector: Remove unused panic_notifier\n\nThe panic notifer in lockup_detector just set did_panic to 1.\nBut did_panic is not used anywhere so we can just remove it.\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: peterz@infradead.org\nCc: gorcunov@gmail.com\nCc: fweisbec@gmail.com\nLKML-Reference: \u003c1283310009-22168-4-git-send-email-dzickus@redhat.com\u003e\nSigned-off-by: Don Zickus \u003cdzickus@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "eac243355a99d6b9d41bbeba4fc83e7f735485f9", "tree": "39cd6ab8a7e48dcc0d59085a674dcda84844e041", "parents": [ "46b93b74fc022885ab69dfc8e2af0562dd626638" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Tue Aug 31 23:00:08 2010 -0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Sep 01 07:33:34 2010 +0200" }, "message": "lockup_detector: Convert cpu notifier to return encapsulate errno value\n\nBy the commit e6bde73b07edeb703d4c89c1daabc09c303de11f\n(\"cpu-hotplug: return better errno on cpu hotplug failure\"),\nthe cpu notifier can return encapsulate errno value, resulting\nin more meaningful error codes for CPU hotplug failures.\n\nThis converts the cpu notifier to return encapsulate errno value\nfor the lockup_detector as well.\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: peterz@infradead.org\nCc: gorcunov@gmail.com\nCc: fweisbec@gmail.com\nLKML-Reference: \u003c1283310009-22168-3-git-send-email-dzickus@redhat.com\u003e\nSigned-off-by: Don Zickus \u003cdzickus@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "950eaaca681c44aab87a46225c9e44f902c080aa", "tree": "5f0290db3f84b7f2929ae53729d74a59dc5bb5e9", "parents": [ "6cb6cbeaa9d6573c674842b9471c0467967aae99" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Aug 31 17:00:18 2010 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Aug 31 17:00:18 2010 -0700" }, "message": "pid: make setpgid() system call use RCU read-side critical section\n\n[ 23.584719]\n[ 23.584720] \u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n[ 23.585059] [ INFO: suspicious rcu_dereference_check() usage. ]\n[ 23.585176] ---------------------------------------------------\n[ 23.585176] kernel/pid.c:419 invoked rcu_dereference_check() without protection!\n[ 23.585176]\n[ 23.585176] other info that might help us debug this:\n[ 23.585176]\n[ 23.585176]\n[ 23.585176] rcu_scheduler_active \u003d 1, debug_locks \u003d 1\n[ 23.585176] 1 lock held by rc.sysinit/728:\n[ 23.585176] #0: (tasklist_lock){.+.+..}, at: [\u003cffffffff8104771f\u003e] sys_setpgid+0x5f/0x193\n[ 23.585176]\n[ 23.585176] stack backtrace:\n[ 23.585176] Pid: 728, comm: rc.sysinit Not tainted 2.6.36-rc2 #2\n[ 23.585176] Call Trace:\n[ 23.585176] [\u003cffffffff8105b436\u003e] lockdep_rcu_dereference+0x99/0xa2\n[ 23.585176] [\u003cffffffff8104c324\u003e] find_task_by_pid_ns+0x50/0x6a\n[ 23.585176] [\u003cffffffff8104c35b\u003e] find_task_by_vpid+0x1d/0x1f\n[ 23.585176] [\u003cffffffff81047727\u003e] sys_setpgid+0x67/0x193\n[ 23.585176] [\u003cffffffff810029eb\u003e] system_call_fastpath+0x16/0x1b\n[ 24.959669] type\u003d1400 audit(1282938522.956:4): avc: denied { module_request } for pid\u003d766 comm\u003d\"hwclock\" kmod\u003d\"char-major-10-135\" scontext\u003dsystem_u:system_r:hwclock_t:s0 tcontext\u003dsystem_u:system_r:kernel_t:s0 tclas\n\nIt turns out that the setpgid() system call fails to enter an RCU\nread-side critical section before doing a PID-to-task_struct translation.\nThis commit therefore does rcu_read_lock() before the translation, and\nalso does rcu_read_unlock() after the last use of the returned pointer.\n\nReported-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\n" }, { "commit": "3aaba20f26f58843e8f20611e5c0b1c06954310f", "tree": "ad15d7aa21af465ddf6091eb490d84312089f245", "parents": [ "fa66f07aa1f0950e1dc78b7ab39728b3f8aa77a1" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Mon Aug 23 16:50:12 2010 +0800" }, "committer": { "name": "Steven Rostedt", "email": "rostedt@goodmis.org", "time": "Tue Aug 31 16:46:23 2010 -0400" }, "message": "tracing: Fix a race in function profile\n\nWhile we are reading trace_stat/functionX and someone just\ndisabled function_profile at that time, we can trigger this:\n\n\tdivide error: 0000 [#1] PREEMPT SMP\n\t...\n\tEIP is at function_stat_show+0x90/0x230\n\t...\n\nThis fix just takes the ftrace_profile_lock and checks if\nrec-\u003ecounter is 0. If it\u0027s 0, we know the profile buffer\nhas been reset.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: stable@kernel.org\nLKML-Reference: \u003c4C723644.4040708@cn.fujitsu.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "9c37547ab62f88aac3e1e3c2065b611f811de9b5", "tree": "2a9c3655e25c93b4c3ce49c575d5d908045ebdd4", "parents": [ "477a3c33d1efa0342a74bd02da2e049191993e2c" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Aug 31 11:18:34 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Aug 31 11:18:34 2010 +0200" }, "message": "workqueue: use zalloc_cpumask_var() for gcwq-\u003emayday_mask\n\nalloc_mayday_mask() was using alloc_cpumask_var() making\ngcwq-\u003emayday_mask contain garbage after initialization on\nCONFIG_CPUMASK_OFFSTACK\u003dy configurations. This combined with the\npreviously fixed GCWQ_DISASSOCIATED initialization bug could make\nrescuers fall into infinite loop trying to bind to an offline cpu.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReported-by: CAI Qian \u003ccaiqian@redhat.com\u003e\n" }, { "commit": "477a3c33d1efa0342a74bd02da2e049191993e2c", "tree": "03d4ae1338f47016fbad6ff131007e009959b4a8", "parents": [ "7c38875a0d0a9b90eee66be79e36995c86acc70c" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Aug 31 10:54:35 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Aug 31 10:54:35 2010 +0200" }, "message": "workqueue: fix GCWQ_DISASSOCIATED initialization\n\ninit_workqueues() incorrectly marks workqueues for all possible CPUs\nassociated. Combined with mayday_mask initialization bug, this can\nmake rescuers keep trying to bind to an offline gcwq indefinitely.\nFix init_workqueues() such that only online CPUs have their gcwqs have\nGCWQ_DISASSOCIATED cleared.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReported-by: CAI Qian \u003ccaiqian@redhat.com\u003e\n" }, { "commit": "fa66f07aa1f0950e1dc78b7ab39728b3f8aa77a1", "tree": "4ad4612c2fc07f159e192fae9145f9d87a697592", "parents": [ "5225c45899e872383ca39f5533d28ec63c54b39e" ], "author": { "name": "Stephane Eranian", "email": "eranian@google.com", "time": "Thu Aug 26 16:40:01 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Aug 30 12:16:55 2010 +0200" }, "message": "perf_events: Fix time tracking for events with pid !\u003d -1 and cpu !\u003d -1\n\nPer-thread events with a cpu filter, i.e., cpu !\u003d -1, were not\nreporting correct timings when the thread never ran on the\nmonitored cpu. The time enabled was reported as a negative\nvalue.\n\nThis patch fixes the problem by updating tstamp_stopped,\ntstamp_running in event_sched_out() for events with filters and\nwhich are marked as INACTIVE.\n\nThe function group_sched_out() is modified to systematically\ncall into event_sched_out() to avoid duplicating the timing\nadjustment code twice.\n\nWith the patch, I now get:\n\n$ task_cpu -i -e unhalted_core_cycles,unhalted_core_cycles\nnoploop 2 noploop for 2 seconds\nCPU0 0\t\t unhalted_core_cycles (ena\u003d1,991,136,594, run\u003d0)\nCPU0 0\t\t unhalted_core_cycles (ena\u003d1,991,136,594, run\u003d0)\n\nCPU1 0\t\t unhalted_core_cycles (ena\u003d1,991,136,594, run\u003d0)\nCPU1 0\t\t unhalted_core_cycles (ena\u003d1,991,136,594, run\u003d0)\n\nCPU2 0\t\t unhalted_core_cycles (ena\u003d1,991,136,594, run\u003d0)\nCPU2 0\t\t unhalted_core_cycles (ena\u003d1,991,136,594, run\u003d0)\n\nCPU3 4,747,990,931 unhalted_core_cycles (ena\u003d1,991,136,594, run\u003d1,991,136,594)\nCPU3 4,747,990,931 unhalted_core_cycles (ena\u003d1,991,136,594, run\u003d1,991,136,594)\n\nSigned-off-by: Stephane Eranian \u003ceranian@gmail.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: paulus@samba.org\nCc: davem@davemloft.net\nCc: fweisbec@gmail.com\nCc: perfmon2-devel@lists.sf.net\nCc: eranian@google.com\nLKML-Reference: \u003c4c76802d.aae9d80a.115d.70fe@mx.google.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6f4dbeca1a5bac4552d49d9e7b774da9f6625e74", "tree": "15d1997a50a971b83c9c577299cbbd414fe512c4", "parents": [ "2547d1d20f3a252567f974de8ce1c572a0815d5a", "25cc69ec34a563e943e85b3b68a79a8aac7f076d" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Aug 28 14:06:19 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Aug 28 14:06:19 2010 -0700" }, "message": "Merge branch \u0027pm-fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6\n\n* \u0027pm-fixes\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:\n PM QoS: Fix inline documentation.\n PM QoS: Fix kzalloc() parameters swapped in pm_qos_power_open()\n" }, { "commit": "2637d139fb9a1bd428a003b7671fda40a034854f", "tree": "7983e0776c95990a545f83275682614e16a71167", "parents": [ "494e2fbe1f8bee22ab2070bd6f4d1a24f7d5fd8b", "288933c02b440621d9c8e7bb5f232cfb7bdef7df" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Aug 28 13:55:31 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Aug 28 13:55:31 2010 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:\n Input: pxa27x_keypad - remove input_free_device() in pxa27x_keypad_remove()\n Input: mousedev - fix regression of inverting axes\n Input: uinput - add devname alias to allow module on-demand load\n Input: hil_kbd - fix compile error\n USB: drop tty argument from usb_serial_handle_sysrq_char()\n Input: sysrq - drop tty argument form handle_sysrq()\n Input: sysrq - drop tty argument from sysrq ops handlers\n" }, { "commit": "98ee74a75ca0f047e75400afa712f7bf08268b8e", "tree": "c87b267f1e279173696f2294b3930940f1a5b570", "parents": [ "7de5d895b2020260190db0021de646f3f22f755e", "5225c45899e872383ca39f5533d28ec63c54b39e" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Aug 27 02:28:40 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Fri Aug 27 02:30:07 2010 +0200" }, "message": "Merge branch \u0027perf/urgent\u0027 into perf/core\n\nConflicts:\n\ttools/perf/util/callchain.h\n\nMerge reason:\n\tFix a non-trivial conflict with latest fixes\n" }, { "commit": "25cc69ec34a563e943e85b3b68a79a8aac7f076d", "tree": "57b2a6b2fe5e4df3461bf6335d7b575e283178ca", "parents": [ "bac1e74dba9755128748b872a0f304dad4d198c6" ], "author": { "name": "Saravana Kannan", "email": "skannan@codeaurora.org", "time": "Thu Aug 26 20:18:43 2010 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Thu Aug 26 20:18:43 2010 +0200" }, "message": "PM QoS: Fix inline documentation.\n\nFix the pm_qos_add_request() kerneldoc comment that doesn\u0027t reflect\nthe behavior of the function after the last PM QoS update.\n\nSigned-off-by: Saravana Kannan \u003cskannan@codeaurora.org\u003e\nAcked-by: mark gross \u003cmarkgross@thegnar.org\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\n" }, { "commit": "d4348c678977c7093438bbbf2067c49396ae941b", "tree": "c60752bc177c3297e28e62f759ddd5816fa52e19", "parents": [ "37822188ef7bb41ae47b84ae283e6ac93cdafb9c", "8d330919927ea31fa083b5a80084dc991da813a0" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 25 10:50:07 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 25 10:50:07 2010 -0700" }, "message": "Merge branch \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n perf, x86, Pentium4: Clear the P4_CCCR_FORCE_OVF flag\n tracing/trace_stack: Fix stack trace on ppc64\n" }, { "commit": "5e686019df425a4fd8003ce7f6eaccbe537331d8", "tree": "cc78762bc0fb471562ca1b5f745834a983020623", "parents": [ "e09b4e9a8d15dce04bedf1b860abeec00de31aad", "cd7240c0b900eb6d690ccee088a6c9b46dae815a" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 25 08:40:56 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 25 08:40:56 2010 -0700" }, "message": "Merge branch \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n x86, tsc, sched: Recompute cyc2ns_offset\u0027s during resume from sleep states\n sched: Fix rq-\u003eclock synchronization when migrating tasks\n" }, { "commit": "7de5d895b2020260190db0021de646f3f22f755e", "tree": "51d012f0b76a2ec1bd3b4837690faf1087f37056", "parents": [ "04fba67163a9e6132614b72b33bb2743bd33ffb3", "502adf5778f4151dcba3f64dd6ed322151f3712c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Aug 25 13:09:58 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Aug 25 13:10:00 2010 +0200" }, "message": "Merge branch \u0027linus\u0027 into perf/core\n\nMerge reason: pick up perf fixes\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "151772dbfad4dbe81721e40f9b3d588ea77bb7aa", "tree": "fea47f977d73063843d0e91e2a139c4f3fb71d6c", "parents": [ "502adf5778f4151dcba3f64dd6ed322151f3712c" ], "author": { "name": "Anton Blanchard", "email": "anton@samba.org", "time": "Wed Aug 25 11:32:38 2010 +1000" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Aug 25 13:08:48 2010 +0200" }, "message": "tracing/trace_stack: Fix stack trace on ppc64\n\nsave_stack_trace() stores the instruction pointer, not the\nfunction descriptor. On ppc64 the trace stack code currently\ndereferences the instruction pointer and shows 8 bytes of\ninstructions in our backtraces:\n\n # cat /sys/kernel/debug/tracing/stack_trace\n Depth Size Location (26 entries)\n ----- ---- --------\n 0) 5424 112 0x6000000048000004\n 1) 5312 160 0x60000000ebad01b0\n 2) 5152 160 0x2c23000041c20030\n 3) 4992 240 0x600000007c781b79\n 4) 4752 160 0xe84100284800000c\n 5) 4592 192 0x600000002fa30000\n 6) 4400 256 0x7f1800347b7407e0\n 7) 4144 208 0xe89f0108f87f0070\n 8) 3936 272 0xe84100282fa30000\n\nSince we aren\u0027t dealing with function descriptors, use %pS\ninstead of %pF to fix it:\n\n # cat /sys/kernel/debug/tracing/stack_trace\n Depth Size Location (26 entries)\n ----- ---- --------\n 0) 5424 112 ftrace_call+0x4/0x8\n 1) 5312 160 .current_io_context+0x28/0x74\n 2) 5152 160 .get_io_context+0x48/0xa0\n 3) 4992 240 .cfq_set_request+0x94/0x4c4\n 4) 4752 160 .elv_set_request+0x60/0x84\n 5) 4592 192 .get_request+0x2d4/0x468\n 6) 4400 256 .get_request_wait+0x7c/0x258\n 7) 4144 208 .__make_request+0x49c/0x610\n 8) 3936 272 .generic_make_request+0x390/0x434\n\nSigned-off-by: Anton Blanchard \u003canton@samba.org\u003e\nCc: rostedt@goodmis.org\nCc: fweisbec@gmail.com\nLKML-Reference: \u003c20100825013238.GE28360@kryten\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8a2e8e5dec7e29c56a46ba176c664ab6a3d04118", "tree": "57da96451bead4986dfcd82aadf47ba2c05745ac", "parents": [ "e41e704bc4f49057fc68b643108366e6e6781aa3" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Aug 25 10:33:56 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Aug 25 10:33:56 2010 +0200" }, "message": "workqueue: fix cwq-\u003enr_active underflow\n\ncwq-\u003enr_active is used to keep track of how many work items are active\nfor the cpu workqueue, where \u0027active\u0027 is defined as either pending on\nglobal worklist or executing. This is used to implement the\nmax_active limit and workqueue freezing. If a work item is queued\nafter nr_active has already reached max_active, the work item doesn\u0027t\nincrement nr_active and is put on the delayed queue and gets activated\nlater as previous active work items retire.\n\ntry_to_grab_pending() which is used in the cancellation path\nunconditionally decremented nr_active whether the work item being\ncancelled is currently active or delayed, so cancelling a delayed work\nitem makes nr_active underflow. This breaks max_active enforcement\nand triggers BUG_ON() in destroy_workqueue() later on.\n\nThis patch fixes this bug by adding a flag WORK_STRUCT_DELAYED, which\nis set while a work item in on the delayed list and making\ntry_to_grab_pending() decrement nr_active iff the work item is\ncurrently active.\n\nThe addition of the flag enlarges cwq alignment to 256 bytes which is\ngetting a bit too large. It\u0027s scheduled to be reduced back to 128\nbytes by merging WORK_STRUCT_PENDING and WORK_STRUCT_CWQ in the next\ndevel cycle.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReported-by: Johannes Berg \u003cjohannes@sipsolutions.net\u003e\n" }, { "commit": "502adf5778f4151dcba3f64dd6ed322151f3712c", "tree": "ad14adb37dedaefabdaf93b08ab9d32bc140ed81", "parents": [ "3b6c5507a69861e80c26f21d04601c674cbeec3d", "c6db67cda735d8ace5f19c3831240e1408679790" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 24 12:21:49 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 24 12:21:49 2010 -0700" }, "message": "Merge branch \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027perf-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n watchdog: Don\u0027t throttle the watchdog\n tracing: Fix timer tracing\n" }, { "commit": "3b6c5507a69861e80c26f21d04601c674cbeec3d", "tree": "339c0761121f5a20d0573c3af3177af87e00e09f", "parents": [ "8ca3eb08097f6839b2206e2242db4179aee3cfb3", "9d0f4dcc5c4d1c5dd01172172684a45b5f49d740" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 24 12:21:02 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 24 12:21:02 2010 -0700" }, "message": "Merge branch \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n mutex: Improve the scalability of optimistic spinning\n" }, { "commit": "bac1e74dba9755128748b872a0f304dad4d198c6", "tree": "68ffa67da67b1d7f06b4ff1cc7a705d3a5842386", "parents": [ "f4e385ccfc10f44364101b126d1ac52b4c806f1d" ], "author": { "name": "David Alan Gilbert", "email": "linux@treblig.org", "time": "Tue Aug 24 20:22:18 2010 +0200" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Tue Aug 24 20:22:18 2010 +0200" }, "message": "PM QoS: Fix kzalloc() parameters swapped in pm_qos_power_open()\n\nsparse spotted that the kzalloc() in pm_qos_power_open() in the\ncurrent Linus\u0027 git tree had its parameters swapped. Fix this.\n\nSigned-off-by: David Alan Gilbert \u003clinux@treblig.org\u003e\nAcked-by: mark gross \u003cmarkgross@thegnar.org\u003e\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\n" }, { "commit": "e41e704bc4f49057fc68b643108366e6e6781aa3", "tree": "8cc85208970ba0c9adf533903243e28c506f23ae", "parents": [ "972fa1c5316d18c8297123e08e9b6930ca34f888" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Aug 24 14:22:47 2010 +0200" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Aug 24 18:01:32 2010 +0200" }, "message": "workqueue: improve destroy_workqueue() debuggability\n\nNow that the worklist is global, having works pending after wq\ndestruction can easily lead to oops and destroy_workqueue() have\nseveral BUG_ON()s to catch these cases. Unfortunately, BUG_ON()\ndoesn\u0027t tell much about how the work became pending after the final\nflush_workqueue().\n\nThis patch adds WQ_DYING which is set before the final flush begins.\nIf a work is requested to be queued on a dying workqueue,\nWARN_ON_ONCE() is triggered and the request is ignored. This clearly\nindicates which caller is trying to queue a work on a dying workqueue\nand keeps the system working in most cases.\n\nLocking rule comment is updated such that the \u0027I\u0027 rule includes\nmodifying the field from destruction path.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "972fa1c5316d18c8297123e08e9b6930ca34f888", "tree": "b96c34cb7ac493a80d959db6b361d2e87e854e06", "parents": [ "06bd6ebffae36d3b105677598c48e8bd0a10b205" ], "author": { "name": "Namhyung Kim", "email": "namhyung@gmail.com", "time": "Sun Aug 22 23:19:43 2010 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Aug 23 11:37:49 2010 +0200" }, "message": "workqueue: mark lock acquisition on worker_maybe_bind_and_lock()\n\nworker_maybe_bind_and_lock() actually grabs gcwq-\u003elock but was missing proper\nannotation. Add it. So this patch will remove following sparse warnings:\n\n kernel/workqueue.c:1214:13: warning: context imbalance in \u0027worker_maybe_bind_and_lock\u0027 - wrong count at exit\n arch/x86/include/asm/irqflags.h:44:9: warning: context imbalance in \u0027worker_rebind_fn\u0027 - unexpected unlock\n kernel/workqueue.c:1991:17: warning: context imbalance in \u0027rescuer_thread\u0027 - unexpected unlock\n\nSigned-off-by: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "06bd6ebffae36d3b105677598c48e8bd0a10b205", "tree": "d75a38a50378a3365bf57383297e0fe0372e916a", "parents": [ "8d9df9f0844ed87541453a3ef91bfc9f487053b7" ], "author": { "name": "Namhyung Kim", "email": "namhyung@gmail.com", "time": "Sun Aug 22 23:19:42 2010 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Aug 23 11:37:49 2010 +0200" }, "message": "workqueue: annotate lock context change\n\nSome of internal functions called within gcwq-\u003elock context releases and\nregrabs the lock but were missing proper annotations. Add it.\n\nSigned-off-by: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "9d0f4dcc5c4d1c5dd01172172684a45b5f49d740", "tree": "e24eb28059f983284c29851e0598667cd428e2a1", "parents": [ "763008c4357b73c8d18396dfd8d79dc58fa3f99d" ], "author": { "name": "Tim Chen", "email": "tim.c.chen@linux.intel.com", "time": "Wed Aug 18 15:00:27 2010 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Aug 23 10:56:27 2010 +0200" }, "message": "mutex: Improve the scalability of optimistic spinning\n\nThere is a scalability issue for current implementation of optimistic\nmutex spin in the kernel. It is found on a 8 node 64 core Nehalem-EX\nsystem (HT mode).\n\nThe intention of the optimistic mutex spin is to busy wait and spin on a\nmutex if the owner of the mutex is running, in the hope that the mutex\nwill be released soon and be acquired, without the thread trying to\nacquire mutex going to sleep. However, when we have a large number of\nthreads, contending for the mutex, we could have the mutex grabbed by\nother thread, and then another ……, and we will keep spinning, wasting cpu\ncycles and adding to the contention. One possible fix is to quit\nspinning and put the current thread on wait-list if mutex lock switch to\na new owner while we spin, indicating heavy contention (see the patch\nincluded).\n\nI did some testing on a 8 socket Nehalem-EX system with a total of 64\ncores. Using Ingo\u0027s test-mutex program that creates/delete files with 256\nthreads (http://lkml.org/lkml/2006/1/8/50) , I see the following speed up\nafter putting in the mutex spin fix:\n\n ./mutex-test V 256 10\n Ops/sec\n 2.6.34 62864\n With fix 197200\n\nRepeating the test with Aim7 fserver workload, again there is a speed up\nwith the fix:\n\n Jobs/min\n 2.6.34 91657\n With fix 149325\n\nTo look at the impact on the distribution of mutex acquisition time, I\ncollected the mutex acquisition time on Aim7 fserver workload with some\ninstrumentation. The average acquisition time is reduced by 48% and\nnumber of contentions reduced by 32%.\n\n #contentions Time to acquire mutex (cycles)\n 2.6.34 72973 44765791\n With fix 49210 23067129\n\nThe histogram of mutex acquisition time is listed below. The acquisition\ntime is in 2^bin cycles. We see that without the fix, the acquisition\ntime is mostly around 2^26 cycles. With the fix, we the distribution get\nspread out a lot more towards the lower cycles, starting from 2^13.\nHowever, there is an increase of the tail distribution with the fix at\n2^28 and 2^29 cycles. It seems a small price to pay for the reduced\naverage acquisition time and also getting the cpu to do useful work.\n\n Mutex acquisition time distribution (acq time \u003d 2^bin cycles):\n 2.6.34 With Fix\n bin #occurrence % #occurrence %\n 11 2 0.00% 120 0.24%\n 12 10 0.01% 790 1.61%\n 13 14 0.02% 2058 4.18%\n 14 86 0.12% 3378 6.86%\n 15 393 0.54% 4831 9.82%\n 16 710 0.97% 4893 9.94%\n 17 815 1.12% 4667 9.48%\n 18 790 1.08% 5147 10.46%\n 19 580 0.80% 6250 12.70%\n 20 429 0.59% 6870 13.96%\n 21 311 0.43% 1809 3.68%\n 22 255 0.35% 2305 4.68%\n 23 317 0.44% 916 1.86%\n 24 610 0.84% 233 0.47%\n 25 3128 4.29% 95 0.19%\n 26 63902 87.69% 122 0.25%\n 27 619 0.85% 286 0.58%\n 28 0 0.00% 3536 7.19%\n 29 0 0.00% 903 1.83%\n 30 0 0.00% 0 0.00%\n\nI\u0027ve done similar experiments with 2.6.35 kernel on smaller boxes as\nwell. One is on a dual-socket Westmere box (12 cores total, with HT).\nAnother experiment is on an old dual-socket Core 2 box (4 cores total, no\nHT)\n\nOn the 12-core Westmere box, I see a 250% increase for Ingo\u0027s mutex-test\nprogram with my mutex patch but no significant difference in aim7\u0027s\nfserver workload.\n\nOn the 4-core Core 2 box, I see the difference with the patch for both\nmutex-test and aim7 fserver are negligible.\n\nSo far, it seems like the patch has not caused regression on smaller\nsystems.\n\nSigned-off-by: Tim Chen \u003ctim.c.chen@linux.intel.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: \u003cstable@kernel.org\u003e # .35.x\nLKML-Reference: \u003c1282168827.9542.72.camel@schen9-DESK\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "c6db67cda735d8ace5f19c3831240e1408679790", "tree": "8512efd772cb3d3f30b49001890c93a22f2db50f", "parents": [ "ede1b4290781ae82ccf0f2ecc6dada8d3dd35779" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Aug 20 11:49:15 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Aug 23 10:48:05 2010 +0200" }, "message": "watchdog: Don\u0027t throttle the watchdog\n\nStephane reported that when the machine locks up, the regular ticks,\nwhich are responsible to resetting the throttle count, stop too.\n\nHence the NMI watchdog can end up being throttled before it reports on\nthe locked up state, and we end up being sad..\n\nCure this by having the watchdog overflow reset its own throttle count.\n\nReported-by: Stephane Eranian \u003ceranian@google.com\u003e\nTested-by: Stephane Eranian \u003ceranian@google.com\u003e\nCc: Don Zickus \u003cdzickus@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1282215916.1926.4696.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "e36c886a0f9d624377977fa6cae309cfd7f362fa", "tree": "f75e7c3e50a48c671ed4dff33103f601a2204af9", "parents": [ "69b26c7ad00fd5b6129400725e2ffb95134a0e1b" ], "author": { "name": "Arjan van de Ven", "email": "arjan@linux.intel.com", "time": "Sat Aug 21 13:07:26 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Aug 21 13:19:37 2010 -0700" }, "message": "workqueue: Add basic tracepoints to track workqueue execution\n\nWith the introduction of the new unified work queue thread pools,\nwe lost one feature: It\u0027s no longer possible to know which worker\nis causing the CPU to wake out of idle. The result is that PowerTOP\nnow reports a lot of \"kworker/a:b\" instead of more readable results.\n\nThis patch adds a pair of tracepoints to the new workqueue code,\nsimilar in style to the timer/hrtimer tracepoints.\n\nWith this pair of tracepoints, the next PowerTOP can correctly\nreport which work item caused the wakeup (and how long it took):\n\nInterrupt (43) i915 time 3.51ms wakeups 141\nWork ieee80211_iface_work time 0.81ms wakeups 29\nWork do_dbs_timer time 0.55ms wakeups 24\nProcess Xorg time 21.36ms wakeups 4\nTimer sched_rt_period_timer time 0.01ms wakeups 1\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": "297c5eee372478fc32fec5fe8eed711eedb13f3d", "tree": "18415eae0833ff4767943f985900524d6b1d73f1", "parents": [ "36423a5ed5e4ea95ceedb68fad52965033e11639" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Aug 20 16:24:55 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Aug 21 08:49:21 2010 -0700" }, "message": "mm: make the vma list be doubly linked\n\nIt\u0027s a really simple list, and several of the users want to go backwards\nin it to find the previous vma. So rather than have to look up the\nprevious entry with \u0027find_vma_prev()\u0027 or something similar, just make it\ndoubly linked instead.\n\nTested-by: Ian Campbell \u003cijc@hellion.org.uk\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f335397d177c906256ee1bba28e8c49e8ec63817", "tree": "b6911d0b40940cbec9083769856e7744d5461e22", "parents": [ "1495cc9df4e81f5a8fa9b0b8f1034b14d24b7d8c" ], "author": { "name": "Dmitry Torokhov", "email": "dmitry.torokhov@gmail.com", "time": "Tue Aug 17 21:15:47 2010 -0700" }, "committer": { "name": "Dmitry Torokhov", "email": "dmitry.torokhov@gmail.com", "time": "Sat Aug 21 00:34:45 2010 -0700" }, "message": "Input: sysrq - drop tty argument form handle_sysrq()\n\nSysrq operations do not accept tty argument anymore so no need to pass\nit to us.\n\n[Stephen Rothwell \u003csfr@canb.auug.org.au\u003e: fix build breakage in drm code\n caused by sysrq using bool but not including linux/types.h]\n\n[Sachin Sant \u003csachinp@in.ibm.com\u003e: fix build breakage in s390 keyboadr\n driver]\n\nAcked-by: Alan Cox \u003calan@lxorguk.ukuu.org.uk\u003e\nAcked-by: Jason Wessel \u003cjason.wessel@windriver.com\u003e\nAcked-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\nSigned-off-by: Dmitry Torokhov \u003cdtor@mail.ru\u003e\n" }, { "commit": "b35de43b31040828f83046f40fd34ba33146409d", "tree": "693ffff84f463da3a7d81d8bd7bb26e144d7d499", "parents": [ "c81476df1b4241aefba4ff83a7701b3a926bd7ce" ], "author": { "name": "Andrea Righi", "email": "arighi@develer.com", "time": "Thu Aug 19 14:13:27 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Aug 20 09:34:54 2010 -0700" }, "message": "kfifo: implement missing __kfifo_skip_r()\n\nkfifo_skip() is currently broken, due to the missing of the internal\nhelper function. Add it.\n\nSigned-off-by: Andrea Righi \u003carighi@develer.com\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nAcked-by: Stefani Seibold \u003cstefani@seibold.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "861d034ee814917a83bd5de4b26e3b8336ddeeb8", "tree": "6514cb3ebbb58fb0a638e267dfd6da510a5c8a00", "parents": [ "763008c4357b73c8d18396dfd8d79dc58fa3f99d" ], "author": { "name": "Peter Zijlstra", "email": "peterz@infradead.org", "time": "Thu Aug 19 13:31:43 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Aug 20 14:59:01 2010 +0200" }, "message": "sched: Fix rq-\u003eclock synchronization when migrating tasks\n\nsched_fork() -- we do task placement in -\u003etask_fork_fair() ensure we\n update_rq_clock() so we work with current time. We leave the vruntime\n in relative state, so the time delay until wake_up_new_task() doesn\u0027t\n matter.\n\nwake_up_new_task() -- Since task_fork_fair() left p-\u003evruntime in\n relative state we can safely migrate, the activate_task() on the\n remote rq will call update_rq_clock() and causes the clock to be\n synced (enough).\n\nTested-by: Jack Daniel \u003cwanders.thirst@gmail.com\u003e\nTested-by: Philby John \u003cpjohn@mvista.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLKML-Reference: \u003c1281002322.1923.1708.camel@laptop\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "1495cc9df4e81f5a8fa9b0b8f1034b14d24b7d8c", "tree": "7a08852f9fb0cb3073367ef84c0218af0b5479f7", "parents": [ "da5cabf80e2433131bf0ed8993abc0f7ea618c73" ], "author": { "name": "Dmitry Torokhov", "email": "dmitry.torokhov@gmail.com", "time": "Tue Aug 17 21:15:46 2010 -0700" }, "committer": { "name": "Dmitry Torokhov", "email": "dmitry.torokhov@gmail.com", "time": "Thu Aug 19 22:07:06 2010 -0700" }, "message": "Input: sysrq - drop tty argument from sysrq ops handlers\n\nNoone is using tty argument so let\u0027s get rid of it.\n\nAcked-by: Alan Cox \u003calan@lxorguk.ukuu.org.uk\u003e\nAcked-by: Jason Wessel \u003cjason.wessel@windriver.com\u003e\nAcked-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\nSigned-off-by: Dmitry Torokhov \u003cdtor@mail.ru\u003e\n" }, { "commit": "c8710ad38900153af7a3e6762e99c062cfa46443", "tree": "a0c0632274c4eb72f51e99a5861f71cffe65ea60", "parents": [ "6016ee13db518ab1cd0cbf43fc2ad5712021e338", "86397dc3ccfc0e17b7550d05eaf15fe91f6498dd" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Aug 19 12:48:09 2010 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Aug 19 12:48:09 2010 +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": "6016ee13db518ab1cd0cbf43fc2ad5712021e338", "tree": "317d1ed2b103db13fef6bb692a73235de41d764b", "parents": [ "7ae07ea3a48d30689ee037cb136bc21f0b37d8ae" ], "author": { "name": "Namhyung Kim", "email": "namhyung@gmail.com", "time": "Wed Aug 11 12:47:59 2010 +0900" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Thu Aug 19 01:33:05 2010 +0200" }, "message": "perf, tracing: add missing __percpu markups\n\nftrace_event_call-\u003eperf_events, perf_trace_buf,\nfgraph_data-\u003ecpu_data and some local variables are percpu pointers\nmissing __percpu markups. Add them.\n\nSigned-off-by: Namhyung Kim \u003cnamhyung@gmail.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Stephane Eranian \u003ceranian@google.com\u003e\nLKML-Reference: \u003c1281498479-28551-1-git-send-email-namhyung@gmail.com\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\n" }, { "commit": "7ae07ea3a48d30689ee037cb136bc21f0b37d8ae", "tree": "2cb895a0794bcb2e45a4f48ef7e93302c1f6332c", "parents": [ "927c7a9e92c4f69097a6e9e086d11fc2f8a5b40b" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Sat Aug 14 20:45:13 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Thu Aug 19 01:32:53 2010 +0200" }, "message": "perf: Humanize the number of contexts\n\nInstead of hardcoding the number of contexts for the recursions\nbarriers, define a cpp constant to make the code more\nself-explanatory.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Stephane Eranian \u003ceranian@google.com\u003e\n" }, { "commit": "927c7a9e92c4f69097a6e9e086d11fc2f8a5b40b", "tree": "d98bde726caf6b27d465852b5683cf08485df007", "parents": [ "f72c1a931e311bb7780fee19e41a89ac42cab50e" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Thu Jul 01 16:20:36 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Thu Aug 19 01:32:31 2010 +0200" }, "message": "perf: Fix race in callchains\n\nNow that software events don\u0027t have interrupt disabled anymore in\nthe event path, callchains can nest on any context. So seperating\nnmi and others contexts in two buffers has become racy.\n\nFix this by providing one buffer per nesting level. Given the size\nof the callchain entries (2040 bytes * 4), we now need to allocate\nthem dynamically.\n\nv2: Fixed put_callchain_entry call after recursion.\n Fix the type of the recursion, it must be an array.\n\nv3: Use a manual pr cpu allocation (temporary solution until NMIs\n can safely access vmalloc\u0027ed memory).\n Do a better separation between callchain reference tracking and\n allocation. Make the \"put\" path lockless for non-release cases.\n\nv4: Protect the callchain buffers with rcu.\n\nv5: Do the cpu buffers allocations node affine.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nTested-by: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Stephane Eranian \u003ceranian@google.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Borislav Petkov \u003cbp@amd64.org\u003e\n" }, { "commit": "f72c1a931e311bb7780fee19e41a89ac42cab50e", "tree": "470aa111c535af47d8444a249c83b5d360806e69", "parents": [ "56962b4449af34070bb1994621ef4f0265eed4d8" ], "author": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Thu Jul 01 02:31:21 2010 +0200" }, "committer": { "name": "Frederic Weisbecker", "email": "fweisbec@gmail.com", "time": "Thu Aug 19 01:32:11 2010 +0200" }, "message": "perf: Factorize callchain context handling\n\nStore the kernel and user contexts from the generic layer instead\nof archs, this gathers some repetitive code.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Paul Mackerras \u003cpaulus@samba.org\u003e\nTested-by: Will Deacon \u003cwill.deacon@arm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Stephane Eranian \u003ceranian@google.com\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Borislav Petkov \u003cbp@amd64.org\u003e\n" } ], "next": "56962b4449af34070bb1994621ef4f0265eed4d8" }