)]}'
{
  "log": [
    {
      "commit": "991ec02cdca33b03a132a0cacfe6f0aa0be9aa8d",
      "tree": "50b5f4e2b9f138da57f76eca44fdcc80a2fcd428",
      "parents": [
        "862366118026a358882eefc70238dbcc3db37aac",
        "84047e360af0394ac5861d433f26bbcf30f77dd1"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Jun 10 19:58:10 2009 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Jun 10 19:58:10 2009 -0700"
      },
      "message": "Merge branch \u0027tracing-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027tracing-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n  function-graph: always initialize task ret_stack\n  function-graph: move initialization of new tasks up in fork\n  function-graph: add memory barriers for accessing task\u0027s ret_stack\n  function-graph: enable the stack after initialization of other variables\n  function-graph: only allocate init tasks if it was not already done\n\nManually fix trivial conflict in kernel/trace/ftrace.c\n"
    },
    {
      "commit": "84047e360af0394ac5861d433f26bbcf30f77dd1",
      "tree": "55848e2ca4856a64b348a57ecca495c2f065aa0f",
      "parents": [
        "f7e8b616ed1cc6f790b82324bce8a2a60295e5c2"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Jun 02 16:51:55 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Tue Jun 02 16:51:55 2009 -0400"
      },
      "message": "function-graph: always initialize task ret_stack\n\nOn creating a new task while running the function graph tracer, if\nwe fail to allocate the ret_stack, and then fail the fork, the\ncode will free the parent ret_stack. This is because the child\nduplicated the parent and currently points to the parent\u0027s ret_stack.\n\nThis patch always initializes the task\u0027s ret_stack to NULL.\n\n[ Impact: prevent crash of parent on low memory during fork ]\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "26c01624a2a40f8a4ddf6449b65c9b1c418d0e72",
      "tree": "eeff81aa0fa56ba1f2c180d4ec6e64cb31af898e",
      "parents": [
        "82310a3272d5a2a7652f5649ad8a55f58c8f74d9"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Jun 02 14:01:19 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Tue Jun 02 14:42:17 2009 -0400"
      },
      "message": "function-graph: add memory barriers for accessing task\u0027s ret_stack\n\nThe code that handles the tasks ret_stack allocation for every task\nassumes that only an interrupt can cause issues (even though interrupts\nare disabled).\n\nIn reality, the code is allocating the ret_stack for tasks that may be\nrunning on other CPUs and there are not efficient memory barriers to\nhandle this case.\n\n[ Impact: prevent crash due to using of uninitialized ret_stack variables ]\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "82310a3272d5a2a7652f5649ad8a55f58c8f74d9",
      "tree": "c909c7a3f1fd3430f64be1d4aa8aff84fdf45b04",
      "parents": [
        "179c498ae2998461fe436437a74dc29036fc7dcc"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Jun 02 12:26:07 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Tue Jun 02 14:41:50 2009 -0400"
      },
      "message": "function-graph: enable the stack after initialization of other variables\n\nThe function graph tracer checks if the task_struct has ret_stack defined\nto know if it is OK or not to use it. The initialization is done for\nall tasks by one process, but the idle tasks use the same initialization\nused by new tasks.\n\nIf an interrupt happens on an idle task that just had the ret_stack\ncreated, but before the rest of the initialization took place, then\nwe can corrupt the return address of the functions.\n\nThis patch moves the setting of the task_struct\u0027s ret_stack to after\nthe other variables have been initialized.\n\n[ Impact: prevent kernel panic on idle task when starting function graph ]\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "179c498ae2998461fe436437a74dc29036fc7dcc",
      "tree": "7794227a9cc45c2ec22d3e3b3062a96d34e8b0b9",
      "parents": [
        "88fc86c283d9c3854e67e4155808027bc2519eb6"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Jun 02 12:03:19 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Tue Jun 02 12:03:19 2009 -0400"
      },
      "message": "function-graph: only allocate init tasks if it was not already done\n\nWhen the function graph tracer is enabled, it calls the initialization\nneeded for the init tasks that would be called on all created tasks.\n\nThe problem is that this is called every time the function graph tracer\nis enabled, and the ret_stack is allocated for the idle tasks each time.\nThus, the old ret_stack is lost and a memory leak is created.\n\nThis is also dangerous because if an interrupt happened on another CPU\nwith the init task and the ret_stack is replaced, we then lose all the\nreturn pointers for the interrupt, and a crash would take place.\n\n[ Impact: fix memory leak and possible crash due to race ]\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "0f6ce3de4ef6ff940308087c49760d068851c1a7",
      "tree": "26a732ee4dd5b0f5612f0385893ec483c6ba4ab3",
      "parents": [
        "112f38a7e36e9d688b389507136bf3af3e6d159b"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Jun 01 21:51:28 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Mon Jun 01 23:26:23 2009 -0400"
      },
      "message": "ftrace: do not profile functions when disabled\n\nA race was found that if one were to enable and disable the function\nprofiler repeatedly, then the system can panic. This was because a profiled\nfunction may be preempted just before disabling interrupts. While\nthe profiler is disabled and then reenabled, the preempted function\ncould start again, and access the hash as it is being initialized.\n\nThis just adds a check in the irq disabled part to check if the profiler\nis enabled, and if it is not then it will just exit.\n\nWhen the system is disabled, the profile_enabled variable is cleared\nbefore calling the unregistering of the function profiler. This\nunregistering calls stop machine which also acts as a synchronize schedule.\n\n[ Impact: fix panic in enabling/disabling function profiler ]\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "2af15d6a44b871ad4c2a651302374cde8f335480",
      "tree": "39f06d511e3e1d1970fe4571128549c1c26230c1",
      "parents": [
        "f2aebaee653a35b01c3665de2cbb1e31456b8ea8"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Thu May 28 13:37:24 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Mon Jun 01 23:23:10 2009 -0400"
      },
      "message": "ftrace: add kernel command line function filtering\n\nWhen using ftrace\u003dfunction on the command line to trace functions\non boot up, one can not filter out functions that are commonly called.\n\nThis patch adds two new ftrace command line commands.\n\n  ftrace_notrace\u003dfunction-list\n  ftrace_filter\u003dfunction-list\n\nWhere function-list is a comma separated list of functions to filter.\nThe ftrace_notrace will make the functions listed not be included\nin the function tracing, and ftrace_filter will only trace the functions\nlisted.\n\nThese two act the same as the debugfs/tracing/set_ftrace_notrace and\ndebugfs/tracing/set_ftrace_filter respectively.\n\nThe simple glob expressions that are allowed by the filter files can also\nbe used by the command line interface.\n\n\tftrace_notrace\u003drcu*,*lock,*spin*\n\nWill not trace any function that starts with rcu, ends with lock, or has\nthe word spin in it.\n\nNote, if the self tests are enabled, they may interfere with the filtering\nset by the command lines.\n\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "24ed0c4bfc7d2d7507bb9d50f7f3bbdcd85d76dd",
      "tree": "954ff0ff7f4249ec7a2e9e9233bb4d8e0670f9ce",
      "parents": [
        "1079cac0f4eb7d968395378b1625979d4c818dd6"
      ],
      "author": {
        "name": "Ming Lei",
        "email": "tom.leiming@gmail.com",
        "time": "Sun May 17 15:31:38 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon May 18 10:24:13 2009 +0200"
      },
      "message": "tracing: fix check for return value of register_module_notifier\n\nreturn zero should be correct, so fix it.\n\n[ Impact: eliminate incorrect syslog message ]\n\nSigned-off-by: Ming Lei \u003ctom.leiming@gmail.com\u003e\nAcked-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: rostedt@goodmis.org\nLKML-Reference: \u003c1242545498-7285-1-git-send-email-tom.leiming@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "93eb677d74a4f7d3edfb678c94f6c0544d9fbad2",
      "tree": "8bbc46895be623a78316230362e94969dbb02135",
      "parents": [
        "f3948f8857ef5de239f28a61dddb1554a0ae4c2c"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Apr 15 13:24:06 2009 -0400"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Apr 17 16:59:15 2009 +0200"
      },
      "message": "ftrace: use module notifier for function tracer\n\nThe hooks in the module code for the function tracer must be called\nbefore any of that module code runs. The function tracer hooks\nmodify the module (replacing calls to mcount to nops). If the code\nis executed while the change occurs, then the CPU can take a GPF.\n\nTo handle the above with a bit of paranoia, I originally implemented\nthe hooks as calls directly from the module code.\n\nAfter examining the notifier calls, it looks as though the start up\nnotify is called before any of the module\u0027s code is executed. This makes\nthe use of the notify safe with ftrace.\n\nOnly the startup notify is required to be \"safe\". The shutdown simply\nremoves the entries from the ftrace function list, and does not modify\nany code.\n\nThis change has another benefit. It removes a issue with a reverse dependency\nin the mutexes of ftrace_lock and module_mutex.\n\n[ Impact: fix lock dependency bug, cleanup ]\n\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "ad8d75fff811a6a230f7f43b05a6483099349533",
      "tree": "764f75c0785b29067b141719b6e8000f005da7fd",
      "parents": [
        "ecda8ae02a08ef065ff387f5cb2a2d4999da2408"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Apr 14 19:39:12 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Tue Apr 14 22:05:43 2009 -0400"
      },
      "message": "tracing/events: move trace point headers into include/trace/events\n\nImpact: clean up\n\nCreate a sub directory in include/trace called events to keep the\ntrace point headers in their own separate directory. Only headers that\ndeclare trace points should be defined in this directory.\n\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Neil Horman \u003cnhorman@tuxdriver.com\u003e\nCc: Zhao Lei \u003czhaolei@cn.fujitsu.com\u003e\nCc: Eduard - Gabriel Munteanu \u003ceduard.munteanu@linux360.ro\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "597af81537654097b67fd7a0c92775e66d4a86fe",
      "tree": "e258b2ce6e6027609a3aa488b697e189872d9cf7",
      "parents": [
        "5452af664f6fba26b80eb2c8c4ceae2999d5cf56"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Apr 03 15:24:12 2009 -0400"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Apr 07 14:43:08 2009 +0200"
      },
      "message": "function-graph: use int instead of atomic for ftrace_graph_active\n\nImpact: cleanup\n\nThe variable ftrace_graph_active is only modified under the\nftrace_lock mutex, thus an atomic is not necessary for modification.\n\nReported-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "5452af664f6fba26b80eb2c8c4ceae2999d5cf56",
      "tree": "08fb64bfc3242ad96b65719a55424db729585f17",
      "parents": [
        "a5dec5573f3c7e63f2f9b5852b9759ea342a5ff9"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Fri Mar 27 00:25:38 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Apr 07 14:43:07 2009 +0200"
      },
      "message": "tracing/ftrace: factorize the tracing files creation\n\nImpact: cleanup\n\nMost of the tracing files creation follow the same pattern:\n\nret \u003d debugfs_create_file(...)\nif (!ret)\n\tpr_warning(\"Couldn\u0027t create ... entry\\n\")\n\nUnify it!\n\nReported-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nLKML-Reference: \u003c1238109938-11840-1-git-send-email-fweisbec@gmail.com\u003e\nSigned-off-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n"
    },
    {
      "commit": "93776a8ec746cf9d32c36e5a5b23d28d8be28826",
      "tree": "6c472ae9f709246ee5268e1d71559d07839fb965",
      "parents": [
        "34886c8bc590f078d4c0b88f50d061326639198d",
        "d508afb437daee7cf07da085b635c44a4ebf9b38"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Apr 07 13:47:33 2009 +0200"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Apr 07 13:47:45 2009 +0200"
      },
      "message": "Merge branch \u0027linus\u0027 into tracing/core\n\nMerge reason: update to upstream tracing facilities\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "2aad1b76e6b0cc5a2e5d9b95a9f356ddddbfa8a9",
      "tree": "80ac6be0f1502079a50f8b1b4ffcc5e0586791e8",
      "parents": [
        "8b54e45b0005875f59cb8b1c44d429a161d5f245"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Mar 30 11:11:28 2009 -0400"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Apr 01 14:47:42 2009 +0200"
      },
      "message": "function-graph: allow unregistering twice\n\nImpact: fix to permanent disabling of function graph tracer\n\nThere should be nothing to prevent a tracer from unregistering a\nfunction graph callback more than once. This can simplify error paths.\n\nBut currently, the counter does not account for mulitple unregistering\nof the function graph callback. If it happens, the function graph\ntracer will be permanently disabled.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "34886c8bc590f078d4c0b88f50d061326639198d",
      "tree": "5119877f332b554bb0c777cdb926e6a49f866d9b",
      "parents": [
        "318e0a73c9e41b9a17241829bcd0605a39b87cb9"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Mar 25 21:00:47 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Mar 25 21:03:36 2009 -0400"
      },
      "message": "tracing: add average time in function to function profiler\n\nShow the average time in the function (Time / Hit)\n\n  Function                               Hit    Time            Avg\n  --------                               ---    ----            ---\n  mwait_idle                              51    140326.6 us     2751.503 us\n  smp_apic_timer_interrupt                47    3517.735 us     74.845 us\n  schedule                                10    2738.754 us     273.875 us\n  __schedule                              10    2732.857 us     273.285 us\n  hrtimer_interrupt                       47    1896.104 us     40.342 us\n  irq_exit                                56    1711.833 us     30.568 us\n  __run_hrtimer                           47    1315.589 us     27.991 us\n  tick_sched_timer                        47    1138.690 us     24.227 us\n  do_softirq                              56    1116.829 us     19.943 us\n  __do_softirq                            56    1066.932 us     19.052 us\n  do_IRQ                                   9    926.153 us      102.905 us\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "318e0a73c9e41b9a17241829bcd0605a39b87cb9",
      "tree": "230bd849953f60d12003fd5b9fecfd151ebb468b",
      "parents": [
        "fb9fb015e92123fa3a8e0c2e2fff491d4a56b470"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Mar 25 20:06:34 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Mar 25 21:03:17 2009 -0400"
      },
      "message": "tracing: remove on the fly allocator from function profiler\n\nImpact: safer code\n\nThe on the fly allocator for the function profiler was to save\nmemory. But at the expense of stability. Although it survived several\ntests, allocating from the function tracer is just too risky, just\nto save space.\n\nThis patch removes the allocator and simply allocates enough entries\nat start up.\n\nEach function gets a profiling structure of 40 bytes. With an average\nof 20K functions, and this is for each CPU, we have 800K per online\nCPU. This is not too bad, at least for non-embedded.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "2a4efa42450762cbfa5c5712aa4cc9f06924c9fd",
      "tree": "70af0a079541af99dec634fc89ce317dee2f1a33",
      "parents": [
        "759ee0915dd713361e72facb78b66600b5712d65"
      ],
      "author": {
        "name": "Zhaolei",
        "email": "zhaolei@cn.fujitsu.com",
        "time": "Wed Mar 25 12:06:05 2009 +0800"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Mar 25 17:45:36 2009 -0400"
      },
      "message": "ftrace: Using FTRACE_WARN_ON() to check \"freed record\" in ftrace_release()\n\n \"Because when we call ftrace_free_rec we change the rec-\u003eip to point to the\n  next record in the chain. Something is very wrong if rec-\u003eip \u003e\u003d s \u0026\u0026\n  rec-\u003eip \u003c e and the record is already free.\"\n\n \"Note, use FTRACE_WARN_ON() macro. This way it shuts down ftrace if it is\n  hit and helps to avoid further damage later.\"\n                   -- Steven Rostedt \u003crostedt@goodmis.org\u003e\n\nSigned-off-by: Zhao Lei \u003czhaolei@cn.fujitsu.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "fb9fb015e92123fa3a8e0c2e2fff491d4a56b470",
      "tree": "8fb33ea3001a1450fbd260c6928df22c543c614a",
      "parents": [
        "a2a16d6a3156ef7309ca7328a20c35df9418e670"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Mar 25 13:26:41 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Mar 25 13:26:41 2009 -0400"
      },
      "message": "tracing: clean up tracing profiler\n\nIngo Molnar suggested clean ups for the profiling code. This patch\nmakes those updates.\n\nReported-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "a2a16d6a3156ef7309ca7328a20c35df9418e670",
      "tree": "8f21d9c56eb34f9bd1057929661c96d04329dd69",
      "parents": [
        "cafb168a1c92e4c9e1731fe3d666c39611762c49"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 23:17:58 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 23:41:11 2009 -0400"
      },
      "message": "function-graph: add option to calculate graph time or not\n\ngraph time is the time that a function is executing another function.\nThus if function A calls B, if graph-time is set, then the time for\nA includes B. This is the default behavior. But if graph-time is off,\nthen the time spent executing B is subtracted from A.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "cafb168a1c92e4c9e1731fe3d666c39611762c49",
      "tree": "536d4bb6d33499d746ffb674126d2983e5d6e361",
      "parents": [
        "0706f1c48ca8a7ab478090b4e38f2e578ae2bfe0"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 20:50:39 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 23:41:10 2009 -0400"
      },
      "message": "tracing: make the function profiler per cpu\n\nImpact: speed enhancement\n\nBy making the function profiler record in per cpu data we not only\nget better readings, avoid races, we also do not have to take any\nlocks.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "0706f1c48ca8a7ab478090b4e38f2e578ae2bfe0",
      "tree": "26b79090f8e7e62796bb871ff089d04799919855",
      "parents": [
        "493762fc534c71d11d489f872c4b4a2c61173668"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Mar 23 23:12:58 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 23:41:09 2009 -0400"
      },
      "message": "tracing: adding function timings to function profiler\n\nIf the function graph trace is enabled, the function profiler will\nuse it to take the timing of the functions.\n\n cat /debug/tracing/trace_stat/functions\n\n  Function                               Hit    Time\n  --------                               ---    ----\n  mwait_idle                             127    183028.4 us\n  schedule                                26    151997.7 us\n  __schedule                              31    151975.1 us\n  sys_wait4                                2    74080.53 us\n  do_wait                                  2    74077.80 us\n  sys_newlstat                           138    39929.16 us\n  do_path_lookup                         179    39845.79 us\n  vfs_lstat_fd                           138    39761.97 us\n  user_path_at                           153    39469.58 us\n  path_walk                              179    39435.76 us\n  __link_path_walk                       189    39143.73 us\n[...]\n\nNote the times are skewed due to the function graph tracer not taking\ninto account schedules.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "493762fc534c71d11d489f872c4b4a2c61173668",
      "tree": "90f308853f26ad5334717d53b18680957aab5ff4",
      "parents": [
        "bac429f037f1a51a74d62bad6d1518c3be065df3"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Mar 23 17:12:36 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 23:41:06 2009 -0400"
      },
      "message": "tracing: move function profiler data out of function struct\n\nImpact: reduce size of memory in function profiler\n\nThe function profiler originally introduces its counters into the\nfunction records itself. There is 20 thousand different functions on\na normal system, and that is adding 20 thousand counters for profiling\nevent when not needed.\n\nA normal run of the profiler yields only a couple of thousand functions\nexecuted, depending on what is being profiled. This means we have around\n18 thousand useless counters.\n\nThis patch rectifies this by moving the data out of the function\nrecords used by dynamic ftrace. Data is preallocated to hold the functions\nwhen the profiling begins. Checks are made during profiling to see if\nmore recorcds should be allocated, and they are allocated if it is safe\nto do so.\n\nThis also removes the dependency from using dynamic ftrace, and also\nremoves the overhead by having it enabled.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "bac429f037f1a51a74d62bad6d1518c3be065df3",
      "tree": "40c3dbdd0f6c097c3c9a1087d219dd8632bd7b74",
      "parents": [
        "425480081e936d8725f0d44b8829d699bf088c6b"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Mar 20 12:50:56 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 23:40:00 2009 -0400"
      },
      "message": "tracing: add function profiler\n\nImpact: new profiling feature\n\nThis patch adds a function profiler. In debugfs/tracing/ two new\nfiles are created.\n\n  function_profile_enabled  - to enable or disable profiling\n\n  trace_stat/functions   - the profiled functions.\n\nFor example:\n\n  echo 1 \u003e /debugfs/tracing/function_profile_enabled\n  ./hackbench 50\n  echo 0 \u003e /debugfs/tracing/function_profile_enabled\n\nyields:\n\n  cat /debugfs/tracing/trace_stat/functions\n\n  Function                               Hit\n  --------                               ---\n  _spin_lock                        10106442\n  _spin_unlock                      10097492\n  kfree                              6013704\n  _spin_unlock_irqrestore            4423941\n  _spin_lock_irqsave                 4406825\n  __phys_addr                        4181686\n  __slab_free                        4038222\n  dput                               4030130\n  path_put                           4023387\n  unroll_tree_refs                   4019532\n[...]\n\nThe most hit functions are listed first. Functions that are not\nhit are not listed.\n\nThis feature depends on and uses dynamic function tracing. When the\nfunction profiling is disabled, no overhead occurs. But it still\ntakes up around 300KB to hold the data, thus it is not recomended\nto keep it enabled for systems low on memory.\n\nWhen a \u00271\u0027 is echoed into the function_profile_enabled file, the\ncounters for is function is reset back to zero. Thus you can see what\nfunctions are hit most by different programs.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "ee000b7f9fe429d2470c674ccec8d344f6789e0d",
      "tree": "35b480a5e5fb90d5a414d942bcb541e7887334d6",
      "parents": [
        "cc59c9e8d0165c632fd056c4a23e36f917507fb4"
      ],
      "author": {
        "name": "Lai Jiangshan",
        "email": "laijs@cn.fujitsu.com",
        "time": "Tue Mar 24 13:38:06 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Mar 24 16:43:12 2009 +0100"
      },
      "message": "tracing: use union for multi-usages field\n\nImpact: cleanup\n\nstruct dyn_ftrace::ip has different usages in his lifecycle,\nwe use union for it. And also for struct dyn_ftrace::flags.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Steven Rostedt \u003csrostedt@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nLKML-Reference: \u003c49C871BE.3080405@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "cc59c9e8d0165c632fd056c4a23e36f917507fb4",
      "tree": "8ca2b92345345d53ce3b5585cf87d72afddda43c",
      "parents": [
        "be6f164a02f394675e2ac2077dd354cebef5b4c0"
      ],
      "author": {
        "name": "Lai Jiangshan",
        "email": "laijs@cn.fujitsu.com",
        "time": "Tue Mar 24 11:03:01 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Mar 24 16:42:49 2009 +0100"
      },
      "message": "ftrace: show virtual PID\n\nImpact: fix PID output under namespaces\n\nWhen current namespace is not the global namespace,\npid read from set_ftrace_pid is no correct.\n\n # ~/newpid_namespace_run bash\n # echo $$\n 1\n # echo 1 \u003e set_ftrace_pid\n # cat set_ftrace_pid\n 3756\n\nSince we write virtual PID to set_ftrace_pid, we need get\nvirtual PID when we read it.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Steven Rostedt \u003csrostedt@redhat.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nLKML-Reference: \u003c49C84D65.9050606@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "be6f164a02f394675e2ac2077dd354cebef5b4c0",
      "tree": "9805294731c00ddb61857a4e1e42019058eb1542",
      "parents": [
        "8aef2d2856158a36c295a8d1288281e4839bff13"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 11:06:24 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 11:06:24 2009 -0400"
      },
      "message": "function-graph: add option for include sleep times\n\nImpact: give user a choice to show times spent while sleeping\n\nThe user may want to see the time a function spent sleeping.\nThis patch adds the trace option \"sleep-time\" to allow that.\nThe \"sleep-time\" option is default on.\n\n echo sleep-time \u003e /debug/tracing/trace_options\n\nproduces:\n\n ------------------------------------------\n 2)  avahi-d-3428  \u003d\u003e    \u003cidle\u003e-0\n ------------------------------------------\n\n 2)               |      finish_task_switch() {\n 2)   0.621 us    |        _spin_unlock_irq();\n 2)   2.202 us    |      }\n 2) ! 1002.197 us |    }\n 2) ! 1003.521 us |  }\n\nwhere as,\n\n echo nosleep-time \u003e /debug/tracing/trace_options\n\nproduces:\n\n 0)    \u003cidle\u003e-0    \u003d\u003e  yum-upd-3416\n ------------------------------------------\n\n 0)               |              finish_task_switch() {\n 0)   0.643 us    |                _spin_unlock_irq();\n 0)   2.342 us    |              }\n 0) + 41.302 us   |            }\n 0) + 42.453 us   |          }\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "8aef2d2856158a36c295a8d1288281e4839bff13",
      "tree": "eef85397dedcad001982724e0be2da6dc089b39f",
      "parents": [
        "05ce5818adee8f8efd0a5ca0d900a6789012516b"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 01:10:15 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 09:33:30 2009 -0400"
      },
      "message": "function-graph: ignore times across schedule\n\nImpact: more accurate timings\n\nThe current method of function graph tracing does not take into\naccount the time spent when a task is not running. This shows functions\nthat call schedule have increased costs:\n\n 3) + 18.664 us   |      }\n ------------------------------------------\n 3)    \u003cidle\u003e-0    \u003d\u003e  kblockd-123\n ------------------------------------------\n\n 3)               |      finish_task_switch() {\n 3)   1.441 us    |        _spin_unlock_irq();\n 3)   3.966 us    |      }\n 3) ! 2959.433 us |    }\n 3) ! 2961.465 us |  }\n\nThis patch uses the tracepoint in the scheduling context switch to\naccount for time that has elapsed while a task is scheduled out.\nNow we see:\n\n ------------------------------------------\n 3)    \u003cidle\u003e-0    \u003d\u003e  edac-po-1067\n ------------------------------------------\n\n 3)               |      finish_task_switch() {\n 3)   0.685 us    |        _spin_unlock_irq();\n 3)   2.331 us    |      }\n 3) + 41.439 us   |    }\n 3) + 42.663 us   |  }\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "05ce5818adee8f8efd0a5ca0d900a6789012516b",
      "tree": "81c90288dd1da4291b5e3ee154756b2d7745c248",
      "parents": [
        "5d1a03dc541dc6672e60e57249ed22f40654ca47"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 00:18:31 2009 -0400"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Mar 24 09:32:52 2009 -0400"
      },
      "message": "function-graph: prevent more than one tracer registering\n\nImpact: prevent crash due to multiple function graph tracers\n\nThe function graph tracer can currently only handle a single tracer\nbeing registered. If another tracer registers with the function\ngraph tracer it can crash the system.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "03303549b1695dc024d4a653cc16bd79f78f9750",
      "tree": "aa731b33460908038a50fb72850b873638a768aa",
      "parents": [
        "b478b782e110fdb4135caa3062b6d687e989d994"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Mon Mar 16 22:41:00 2009 +0100"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Mar 16 22:15:36 2009 -0400"
      },
      "message": "tracing/ftrace: fix the check on nopped sites\n\nImpact: fix a dynamic tracing failure\n\nRecently, the function and function graph tracers failed to use dynamic\ntracing after the following commit:\n\nfa9d13cf135efbd454453a53b6299976bea245a9\n(ftrace: don\u0027t try to __ftrace_replace_code on !FTRACE_FL_CONVERTED rec)\n\nThe patch is right except a mistake on the check for the FTRACE_FL_CONVERTED\nflag. The code patching is aborted in case of successfully nopped sites.\nWhat we want is the opposite: ignore the callsites that haven\u0027t been nopped.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "e94142a67f8bad494c593f0a07c9fc2fbec98c0e",
      "tree": "75419622606aa186da5592302c91cb93471bec26",
      "parents": [
        "850a80cfaa5aec3e626eb3736eff890a80e4fa77"
      ],
      "author": {
        "name": "Lai Jiangshan",
        "email": "laijs@cn.fujitsu.com",
        "time": "Fri Mar 13 17:51:27 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Mar 13 11:36:20 2009 +0100"
      },
      "message": "ftrace: remove struct list_head from struct dyn_ftrace\n\nImpact: save memory\n\nThe struct dyn_ftrace table is very large, this patch will save\nabout 50%.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Steven Rostedt \u003csrostedt@redhat.com\u003e\nLKML-Reference: \u003c49BA2C9F.8020009@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "850a80cfaa5aec3e626eb3736eff890a80e4fa77",
      "tree": "777195c11a34eee8a63a5d2ccc3cf0ccd2855491",
      "parents": [
        "fa9d13cf135efbd454453a53b6299976bea245a9"
      ],
      "author": {
        "name": "Lai Jiangshan",
        "email": "laijs@cn.fujitsu.com",
        "time": "Fri Mar 13 17:47:23 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Mar 13 11:35:31 2009 +0100"
      },
      "message": "ftrace: use seq_read\n\nImpact: cleanup\n\nVFS layer has tested the file mode, we do not need test it.\n\nSigned-off-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Steven Rostedt \u003csrostedt@redhat.com\u003e\nLKML-Reference: \u003c49BA2BAB.6010608@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "fa9d13cf135efbd454453a53b6299976bea245a9",
      "tree": "240d46a90984f3c84f336535269e97559e891104",
      "parents": [
        "b00f0b6dc1773b4c8f538503247da050b5ea631b"
      ],
      "author": {
        "name": "Zhaolei",
        "email": "zhaolei@cn.fujitsu.com",
        "time": "Fri Mar 13 17:16:34 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Mar 13 10:25:06 2009 +0100"
      },
      "message": "ftrace: don\u0027t try to __ftrace_replace_code on !FTRACE_FL_CONVERTED rec\n\nDo __ftrace_replace_code for !FTRACE_FL_CONVERTED rec will always\nfail, we should ignore this rec.\n\nSigned-off-by: Zhao Lei \u003czhaolei@cn.fujitsu.com\u003e\nCc: \"Steven Rostedt ;\" \u003crostedt@goodmis.org\u003e\nLKML-Reference: \u003c49BA2472.4060206@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "b00f0b6dc1773b4c8f538503247da050b5ea631b",
      "tree": "94c81517cb3d1def0c0f9ccb33c48fb03c0f1c75",
      "parents": [
        "62a394eb77a1ddea73273f53ed8c3ccf6e04f2fb"
      ],
      "author": {
        "name": "Zhaolei",
        "email": "zhaolei@cn.fujitsu.com",
        "time": "Fri Mar 13 17:14:01 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Mar 13 10:25:06 2009 +0100"
      },
      "message": "ftrace: avoid double-free of dyn_ftrace\n\nIf dyn_ftrace is freed before ftrace_release(), ftrace_release()\nwill free it again and make ftrace_free_records wrong.\n\nSigned-off-by: Zhao Lei \u003czhaolei@cn.fujitsu.com\u003e\nCc: \"Steven Rostedt ;\" \u003crostedt@goodmis.org\u003e\nLKML-Reference: \u003c49BA23D9.1050900@cn.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "10dd3ebe213c31bff14b4dae3c5d32a76b1fad7c",
      "tree": "251609d532ccbb4c157a2c5c3d7a5b8176eeab8c",
      "parents": [
        "422d3c7a577b15e1384c9d4e72a9540896b685fa"
      ],
      "author": {
        "name": "KOSAKI Motohiro",
        "email": "kosaki.motohiro@jp.fujitsu.com",
        "time": "Fri Mar 06 15:29:04 2009 +0900"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Mar 06 12:07:38 2009 +0100"
      },
      "message": "tracing: fix deadlock when setting set_ftrace_pid\n\nImpact: fix deadlock while using set_ftrace_pid\n\nReproducer:\n\n\t# cd /sys/kernel/debug/tracing\n\t# echo $$ \u003e set_ftrace_pid\n\n\tthen, console becomes hung.\n\nDetails:\n\nwhen writing set_ftracepid, kernel callstack is following\n\n\tftrace_pid_write()\n\t\tmutex_lock(\u0026ftrace_lock);\n\t\tftrace_update_pid_func()\n\t\t\tmutex_lock(\u0026ftrace_lock);\n\t\t\tmutex_unlock(\u0026ftrace_lock);\n\t\tmutex_unlock(\u0026ftrace_lock);\n\nthen, system always deadlocks when ftrace_pid_write() is called.\n\nIn past days, ftrace_pid_write() used ftrace_start_lock, but\ncommit e6ea44e9b4c12325337cd1c06103cd515a1c02b2 consolidated\nftrace_start_lock to ftrace_lock.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Lai Jiangshan \u003claijs@cn.fujitsu.com\u003e\nCc: Steven Rostedt \u003csrostedt@redhat.com\u003e\nLKML-Reference: \u003c20090306151155.0778.A69D9226@jp.fujitsu.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "5e2336a0d47c9661a40cc5ef85135ce1406af6e8",
      "tree": "6d977e4471f8e31245602a26e939368689d2383a",
      "parents": [
        "2002c258faaa8f89543df284fdbaa9e4b171547f"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Thu Mar 05 21:44:55 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Thu Mar 05 21:46:40 2009 -0500"
      },
      "message": "tracing: make all file_operations const\n\nImpact: cleanup\n\nAll file_operations structures should be constant. No one is going to\nchange them.\n\nReported-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "c478f8786973d6d7552c652ddad3f6fd86b5af28",
      "tree": "39967f4bb9a35d626584bd46f1acd916c6b5278d",
      "parents": [
        "843adf2379c18ed9a1b7493ee208bfd5512732e0",
        "4377245aa93b65b6597e4b7bb460fb9abc48b56b"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Feb 22 18:12:01 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Feb 22 18:12:01 2009 +0100"
      },
      "message": "Merge branch \u0027tip/x86/ftrace\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace\n\nConflicts:\n\tinclude/linux/ftrace.h\n\tkernel/trace/ftrace.c\n"
    },
    {
      "commit": "4377245aa93b65b6597e4b7bb460fb9abc48b56b",
      "tree": "00eae2cbdd12e855bbde2f6cd6d1a6e6fd659a11",
      "parents": [
        "90c7ac49aa819feb9433b5310089fca6399881c0"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Thu Feb 19 13:41:27 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Feb 20 14:30:20 2009 -0500"
      },
      "message": "ftrace: break out modify loop immediately on detection of error\n\nImpact: added precaution on failure detection\n\nBreak out of the modifying loop as soon as a failure is detected.\nThis is just an added precaution found by code review and was not\nfound by any bug chasing.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "000ab691172db3921efa3cb7f17fc79235a1de7f",
      "tree": "5670e20fe203488b408977d5d5634fc9ddf418e1",
      "parents": [
        "07a66d7c53a538e1a9759954a82bb6c07365eff9"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Feb 17 13:35:06 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Feb 20 13:16:18 2009 -0500"
      },
      "message": "ftrace: allow archs to preform pre and post process for code modification\n\nThis patch creates the weak functions: ftrace_arch_code_modify_prepare\nand ftrace_arch_code_modify_post_process that are called before and\nafter the stop machine is called to modify the kernel text.\n\nIf the arch needs to do pre or post processing, it only needs to define\nthese functions.\n\n[ Update: Ingo Molnar suggested using the name ftrace_arch_code_modify_*\n          over using ftrace_arch_modify_* ]\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "f9349a8f978929a0c71d2c42ae299f7d462c239d",
      "tree": "e5d010a27078993709fd286f358122886cbbc3bc",
      "parents": [
        "64b36ca7f408e0bd45487c8c28f168f11f3b6dcd"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Thu Feb 19 21:13:12 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Feb 20 11:36:24 2009 +0100"
      },
      "message": "tracing/function-graph-tracer: make set_graph_function file support ftrace regex\n\nImpact: trace only functions matching a pattern\n\nThe set_graph_function file let one to trace only one or several\nchosen functions and follow all their code flow.\n\nCurrently, only a constant function name is allowed so this patch\nallows the ftrace_regex functions:\n\n- matches all functions that end with \"name\":\n  echo *name \u003e set_graph_function\n\n- matches all functions that begin with \"name\":\n  echo name* \u003e set_graph_function\n\n- matches all functions that contains \"name\":\n  echo *name* \u003e set_graph_function\n\nExample:\n\necho mutex* \u003e set_graph_function\n\n 0)               |  mutex_lock_nested() {\n 0)   0.563 us    |    __might_sleep();\n 0)   2.072 us    |  }\n 0)               |  mutex_unlock() {\n 0)   1.036 us    |    __mutex_unlock_slowpath();\n 0)   2.433 us    |  }\n 0)               |  mutex_unlock() {\n 0)   0.691 us    |    __mutex_unlock_slowpath();\n 0)   1.787 us    |  }\n 0)               |  mutex_lock_interruptible_nested() {\n 0)   0.548 us    |    __might_sleep();\n 0)   1.945 us    |  }\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ac07bcaa8259841905ead3f8cd60b1923ca6c0e5",
      "tree": "162def1cd53ef477adca17fe06c33a484f6b2e87",
      "parents": [
        "37bd824a35a60abc73e5fa8816bd5f50c913d69b",
        "35ebf1caa4854ad5ba25f3a72967acc064147994"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Feb 18 01:09:07 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Feb 18 01:09:07 2009 +0100"
      },
      "message": "Merge branch \u0027tip/tracing/ftrace\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace\n"
    },
    {
      "commit": "37bd824a35a60abc73e5fa8816bd5f50c913d69b",
      "tree": "e6f718191893ccb713f854fc8bf4a5866a41fe2b",
      "parents": [
        "73d3fd96e77745742f3750b7b19ee42204adc210",
        "5b058bcde961bf28678a70e44c079107313543b6"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Feb 18 01:08:13 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Feb 18 01:08:13 2009 +0100"
      },
      "message": "Merge branches \u0027tracing/ftrace\u0027 and \u0027tracing/urgent\u0027 into tracing/core\n"
    },
    {
      "commit": "5b058bcde961bf28678a70e44c079107313543b6",
      "tree": "077a1bd366399544a84f61b07ae2f7bd894fae47",
      "parents": [
        "f9aa28adfc6a4b01268ebb6d88566cca8627905f"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Tue Feb 17 18:35:34 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Feb 17 19:20:17 2009 +0100"
      },
      "message": "tracing/function-graph-tracer: trace the idle tasks\n\nWhen the function graph tracer is activated, it iterates over the task_list\nto allocate a stack to store the return addresses.\n\nBut the per cpu idle tasks are not iterated by using\ndo_each_thread / while_each_thread.\n\nSo we have to iterate on them manually.\n\nThis fixes somes weirdness in the traces and many losses of traces.\nExamples on two cpus:\n\n 0)   Xorg-4287    |   2.906 us    |              }\n 0)   Xorg-4287    |   3.965 us    |            }\n 0)   Xorg-4287    |   5.302 us    |          }\n ------------------------------------------\n 0)   Xorg-4287    \u003d\u003e    \u003cidle\u003e-0\n ------------------------------------------\n\n 0)    \u003cidle\u003e-0    |   2.861 us    |                        }\n 0)    \u003cidle\u003e-0    |   0.526 us    |                        set_normalized_timespec();\n 0)    \u003cidle\u003e-0    |   7.201 us    |                      }\n 0)    \u003cidle\u003e-0    |   8.214 us    |                    }\n 0)    \u003cidle\u003e-0    |               |                    clockevents_program_event() {\n 0)    \u003cidle\u003e-0    |               |                      lapic_next_event() {\n 0)    \u003cidle\u003e-0    |   0.510 us    |                        native_apic_mem_write();\n 0)    \u003cidle\u003e-0    |   1.546 us    |                      }\n 0)    \u003cidle\u003e-0    |   2.583 us    |                    }\n 0)    \u003cidle\u003e-0    | + 12.435 us   |                  }\n 0)    \u003cidle\u003e-0    | + 13.470 us   |                }\n 0)    \u003cidle\u003e-0    |   0.608 us    |                _spin_unlock_irqrestore();\n 0)    \u003cidle\u003e-0    | + 23.270 us   |              }\n 0)    \u003cidle\u003e-0    | + 24.336 us   |            }\n 0)    \u003cidle\u003e-0    | + 25.417 us   |          }\n 0)    \u003cidle\u003e-0    |   0.593 us    |          _spin_unlock();\n 0)    \u003cidle\u003e-0    | + 41.869 us   |        }\n 0)    \u003cidle\u003e-0    | + 42.906 us   |      }\n 0)    \u003cidle\u003e-0    | + 95.035 us   |    }\n 0)    \u003cidle\u003e-0    |   0.540 us    |    menu_reflect();\n 0)    \u003cidle\u003e-0    | ! 100.404 us  |  }\n 0)    \u003cidle\u003e-0    |   0.564 us    |  mce_idle_callback();\n 0)    \u003cidle\u003e-0    |               |  enter_idle() {\n 0)    \u003cidle\u003e-0    |   0.526 us    |    mce_idle_callback();\n 0)    \u003cidle\u003e-0    |   1.757 us    |  }\n 0)    \u003cidle\u003e-0    |               |  cpuidle_idle_call() {\n 0)    \u003cidle\u003e-0    |               |    menu_select() {\n 0)    \u003cidle\u003e-0    |   0.525 us    |      pm_qos_requirement();\n 0)    \u003cidle\u003e-0    |   0.518 us    |      tick_nohz_get_sleep_length();\n 0)    \u003cidle\u003e-0    |   2.621 us    |    }\n[...]\n 1)    \u003cidle\u003e-0    |   0.518 us    |              touch_softlockup_watchdog();\n 1)    \u003cidle\u003e-0    | + 14.355 us   |            }\n 1)    \u003cidle\u003e-0    | + 22.840 us   |          }\n 1)    \u003cidle\u003e-0    | + 25.949 us   |        }\n 1)    \u003cidle\u003e-0    |               |        handle_irq() {\n 1)    \u003cidle\u003e-0    |   0.511 us    |          irq_to_desc();\n 1)    \u003cidle\u003e-0    |               |          handle_edge_irq() {\n 1)    \u003cidle\u003e-0    |   0.638 us    |            _spin_lock();\n 1)    \u003cidle\u003e-0    |               |            ack_apic_edge() {\n 1)    \u003cidle\u003e-0    |   0.510 us    |              irq_to_desc();\n 1)    \u003cidle\u003e-0    |               |              move_native_irq() {\n 1)    \u003cidle\u003e-0    |   0.510 us    |                irq_to_desc();\n 1)    \u003cidle\u003e-0    |   1.532 us    |              }\n 1)    \u003cidle\u003e-0    |   0.511 us    |              native_apic_mem_write();\n ------------------------------------------\n 1)    \u003cidle\u003e-0    \u003d\u003e    cat-5073\n ------------------------------------------\n\n 1)    cat-5073    |   3.731 us    |                    }\n 1)    cat-5073    |               |                    run_local_timers() {\n 1)    cat-5073    |   0.533 us    |                      hrtimer_run_queues();\n 1)    cat-5073    |               |                      raise_softirq() {\n 1)    cat-5073    |               |                        __raise_softirq_irqoff() {\n 1)    cat-5073    |               |                          /* nr: 1 */\n 1)    cat-5073    |   2.718 us    |                        }\n 1)    cat-5073    |   3.814 us    |                      }\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "b6887d7916e44c1d8913084fb6aa5004d9473f1a",
      "tree": "3446baa5592ce9ce17abb51ffdf3d89e6b52ef9b",
      "parents": [
        "6a24a244cd3a02d5b290293c32fcf2c6e92b4235"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Feb 17 12:32:04 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Feb 17 12:32:04 2009 -0500"
      },
      "message": "ftrace: rename _hook to _probe\n\nImpact: clean up\n\nIngo Molnar did not like the _hook naming convention used by the\nselect function tracer. Luis Claudio R. Goncalves suggested using\nthe \"_probe\" extension. This patch implements the change of\ncalling the functions and variables \"_hook\" and replacing them\nwith \"_probe\".\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "6a24a244cd3a02d5b290293c32fcf2c6e92b4235",
      "tree": "8328e5e7da792a07a338f20974eaea4f80bb59ac",
      "parents": [
        "73d3fd96e77745742f3750b7b19ee42204adc210"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Feb 17 11:20:26 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Feb 17 11:20:26 2009 -0500"
      },
      "message": "ftrace: clean up coding style\n\nIngo Molnar pointed out some coding style issues with the recent ftrace\nupdates. This patch cleans them up.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "73d3fd96e77745742f3750b7b19ee42204adc210",
      "tree": "02eb978e04288883d7f7709e87d8906687c29ba7",
      "parents": [
        "97d0bb8dcd8c2812e1927cdb51d7b1f9c98352b5"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Feb 17 11:48:18 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Feb 17 11:50:42 2009 +0100"
      },
      "message": "ftrace: fix !CONFIG_DYNAMIC_FTRACE ftrace_swapper_pid definition\n\nImpact: build fix\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "809dcf29ce4e1723709910878e050bd187617e0e",
      "tree": "4747ede5ad0678d6ae88176f403a2c26f277182e",
      "parents": [
        "8fc0c701c5b6c0c3e242758c3acef6f9047940a9"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 23:06:01 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 23:06:01 2009 -0500"
      },
      "message": "ftrace: add pretty print to selected fuction traces\n\nThis patch adds a call back for the tracers that have hooks to\nselected functions. This allows the tracer to show better output\nin the set_ftrace_filter file.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "8fc0c701c5b6c0c3e242758c3acef6f9047940a9",
      "tree": "aa9c495fc2d898b39873e1ce9f154bed64b33f8e",
      "parents": [
        "23b4ff3aa479c9e3bb23cb6b2d0a97878399784a"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 15:28:00 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 22:50:06 2009 -0500"
      },
      "message": "ftrace: show selected functions in set_ftrace_filter\n\nThis patch adds output to show what functions have tracer hooks\nattached to them.\n\n  # echo \u0027sys_open:traceon:4\u0027 \u003e /debug/tracing/set_ftrace_filter\n  # cat set_ftrace_filter\n\n #### all functions enabled ####\n sys_open:ftrace_traceon:0000000000000004\n\n  # echo \u0027do_fork:traceoff:\u0027 \u003e set_ftrace_filter\n  # cat set_ftrace_filter\n\n #### all functions enabled ####\n sys_open:ftrace_traceon:0000000000000002\n do_fork:ftrace_traceoff:ffffffffffffffff\n\nNote the 4 changed to a 2. This is because The code was executed twice\nsince the traceoff was added. If a cat is done again:\n\n #### all functions enabled ####\n sys_open:ftrace_traceon\n do_fork:ftrace_traceoff:ffffffffffffffff\n\nThe number disappears. That is because it will not print a NULL.\n\nCallbacks to allow the tracer to pretty print will be implemented soon.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "59df055f1991c9fc0c71a9230663c39188f6972f",
      "tree": "e1799897a8c8da924a3e933f539e8869e8725cb6",
      "parents": [
        "e6ea44e9b4c12325337cd1c06103cd515a1c02b2"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Sat Feb 14 15:29:06 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 22:44:09 2009 -0500"
      },
      "message": "ftrace: trace different functions with a different tracer\n\nImpact: new feature\n\nCurrently, the function tracer only gives you an ability to hook\na tracer to all functions being traced. The dynamic function trace\nallows you to pick and choose which of those functions will be\ntraced, but all functions being traced will call all tracers that\nregistered with the function tracer.\n\nThis patch adds a new feature that allows a tracer to hook to specific\nfunctions, even when all functions are being traced. It allows for\ndifferent functions to call different tracer hooks.\n\nThe way this is accomplished is by a special function that will hook\nto the function tracer and will set up a hash table knowing which\ntracer hook to call with which function. This is the most general\nand easiest method to accomplish this. Later, an arch may choose\nto supply their own method in changing the mcount call of a function\nto call a different tracer. But that will be an exercise for the\nfuture.\n\nTo register a function:\n\n struct ftrace_hook_ops {\n\tvoid\t\t\t(*func)(unsigned long ip,\n\t\t\t\t\tunsigned long parent_ip,\n\t\t\t\t\tvoid **data);\n\tint\t\t\t(*callback)(unsigned long ip, void **data);\n\tvoid\t\t\t(*free)(void **data);\n };\n\n int register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,\n\t\t\t\t  void *data);\n\nglob is a simple glob to search for the functions to hook.\nops is a pointer to the operations (listed below)\ndata is the default data to be passed to the hook functions when traced\n\nops:\n func is the hook function to call when the functions are traced\n callback is a callback function that is called when setting up the hash.\n   That is, if the tracer needs to do something special for each\n   function, that is being traced, and wants to give each function\n   its own data. The address of the entry data is passed to this\n   callback, so that the callback may wish to update the entry to\n   whatever it would like.\n free is a callback for when the entry is freed. In case the tracer\n   allocated any data, it is give the chance to free it.\n\nTo unregister we have three functions:\n\n  void\n  unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,\n\t\t\t\tvoid *data)\n\nThis will unregister all hooks that match glob, point to ops, and\nhave its data matching data. (note, if glob is NULL, blank or \u0027*\u0027,\nall functions will be tested).\n\n  void\n  unregister_ftrace_function_hook_func(char *glob,\n\t\t\t\t struct ftrace_hook_ops *ops)\n\nThis will unregister all functions matching glob that has an entry\npointing to ops.\n\n  void unregister_ftrace_function_hook_all(char *glob)\n\nThis simply unregisters all funcs.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "e6ea44e9b4c12325337cd1c06103cd515a1c02b2",
      "tree": "01d13cb3dfb6031c220b42cedc7df7c84dc116b4",
      "parents": [
        "52baf11922db7377b580dd5448a07f71c6a35611"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Sat Feb 14 01:42:44 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 18:15:31 2009 -0500"
      },
      "message": "ftrace: consolidate mutexes\n\nImpact: clean up\n\nNow that ftrace_lock is a mutex, there is no reason to have three\ndifferent mutexes protecting similar data. All the mutex paths\nare not in hot paths, so having a mutex to cover more data is\nnot a problem.\n\nThis patch removes the ftrace_sysctl_lock and ftrace_start_lock\nand uses the ftrace_lock to protect the locations that were protected\nby these locks. By doing so, this change also removes some of\nthe lock nesting that was taking place.\n\nThere are still more mutexes in ftrace.c that can probably be\nconsolidated, but they can be dealt with later. We need to be careful\nabout the way the locks are nested, and by consolidating, we can cause\na recursive deadlock.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "52baf11922db7377b580dd5448a07f71c6a35611",
      "tree": "8fe8a5346da71f63d627ff3824e065efff88889b",
      "parents": [
        "f6180773d90595650e11de0118bb112018290915"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Sat Feb 14 01:15:39 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 17:33:14 2009 -0500"
      },
      "message": "ftrace: convert ftrace_lock from a spinlock to mutex\n\nImpact: clean up\n\nThe older versions of ftrace required doing the ftrace list\nsearch under atomic context. Now all the calls are in non-atomic\ncontext. There is no reason to keep the ftrace_lock as a spinlock.\n\nThis patch converts it to a mutex.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "f6180773d90595650e11de0118bb112018290915",
      "tree": "ccf8642d7ac584f73e7820fae64fc4daf4546f6b",
      "parents": [
        "e68746a271eb3393a2183840be9e903caddf765b"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Sat Feb 14 00:40:25 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 17:06:02 2009 -0500"
      },
      "message": "ftrace: add command interface for function selection\n\nAllow for other tracers to add their own commands for function\nselection. This interface gives a trace the ability to name a\ncommand for function selection. Right now it is pretty limited\nin what it offers, but this is a building step for more features.\n\nThe :mod: command is converted to this interface and also serves\nas a template for other implementations.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "e68746a271eb3393a2183840be9e903caddf765b",
      "tree": "106ea87792837ccee1476687d9f9a067f96488a9",
      "parents": [
        "64e7c440618998fd69eee6ab490b042d12248021"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Feb 13 20:53:42 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 17:03:49 2009 -0500"
      },
      "message": "ftrace: enable filtering only when a function is filtered on\n\nImpact: fix to prevent empty set_ftrace_filter and no ftrace output\n\nThe function filter is used to only trace a given set of functions.\nThe filter is enabled when a function name is echoed into the\nset_ftrace_filter file. But if the name has a typo and the function\nis not found, the filter is enabled, but no function is listed.\n\nThis makes a confusing situation where set_ftrace_filter is empty\nbut no functions ever get enabled for tracing.\n\nFor example:\n\n # cat /debug/tracing/set_ftrace_filter\n\n  #### all functions enabled ####\n\n # echo bad_name \u003e set_ftrace_filter\n # cat /debug/tracing/set_ftrace_filter\n\n # echo function \u003e current_tracer\n # cat trace\n\n  # tracer: nop\n  #\n  #           TASK-PID    CPU#    TIMESTAMP  FUNCTION\n  #              | |       |          |         |\n\nThis patch changes that to only enable filtering if a function\nis set to be filtered on. Now, the filter is not enabled if\na bad name is echoed into set_ftrace_filter.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "64e7c440618998fd69eee6ab490b042d12248021",
      "tree": "384246f895f2697dd6927b776c67755cc13e901d",
      "parents": [
        "9f4801e30ad291e27284e873696da1ead92d68fa"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Feb 13 17:08:48 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 16:55:50 2009 -0500"
      },
      "message": "ftrace: add module command function filter selection\n\nThis patch adds a \"command\" syntax to the function filtering files:\n\n  /debugfs/tracing/set_ftrace_filter\n  /debugfs/tracing/set_ftrace_notrace\n\nOf the format:  \u003cfunction\u003e:\u003ccommand\u003e:\u003cparameter\u003e\n\nThe command is optional, and dependent on the command, so are\nthe parameters.\n\n echo do_fork \u003e set_ftrace_filter\n\nWill only trace \u0027do_fork\u0027.\n\n echo \u0027sched_*\u0027 \u003e set_ftrace_filter\n\nWill only trace functions starting with the letters \u0027sched_\u0027.\n\n echo \u0027*:mod:ext3\u0027 \u003e set_ftrace_filter\n\nWill trace only the ext3 module functions.\n\n echo \u0027*write*:mod:ext3\u0027 \u003e set_ftrace_notrace\n\nWill prevent the ext3 functions with the letters \u0027write\u0027 in\nthe name from being traced.\n\n echo \u0027!*_allocate:mod:ext3\u0027 \u003e set_ftrace_filter\n\nWill remove the functions in ext3 that end with the letters\n\u0027_allocate\u0027 from the ftrace filter.\n\nAlthough this patch implements the \u0027command\u0027 format, only the\n\u0027mod\u0027 command is supported. More commands to follow.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "9f4801e30ad291e27284e873696da1ead92d68fa",
      "tree": "2a374e89f4f4ecb13cbcf8f914076539e9096517",
      "parents": [
        "7f24b31b01a271b62346d9df084b029e48612163"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Feb 13 15:56:43 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 16:49:57 2009 -0500"
      },
      "message": "ftrace: break up ftrace_match_records into smaller components\n\nImpact: clean up\n\nftrace_match_records does a lot of things that other features\ncan use. This patch breaks up ftrace_match_records and pulls\nout ftrace_setup_glob and ftrace_match_record.\n\nftrace_setup_glob prepares a simple glob expression for use with\nftrace_match_record. ftrace_match_record compares a single record\nwith a glob type.\n\nBreaking this up will allow for more features to run on individual\nrecords.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "7f24b31b01a271b62346d9df084b029e48612163",
      "tree": "ad611a62206455b128db3032bf1a535207b1d20f",
      "parents": [
        "265c831cb03d533cbe159af45798ac9fef534260"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Feb 13 14:37:33 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 16:33:15 2009 -0500"
      },
      "message": "ftrace: rename ftrace_match to ftrace_match_records\n\nImpact: clean up\n\nftrace_match is too generic of a name. What it really does is\nsearch all records and matches the records with the given string,\nand either sets or unsets the functions to be traced depending\non if the parameter \u0027enable\u0027 is set or not.\n\nThis allows us to make another function called ftrace_match that\ncan be used to test a single record.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "265c831cb03d533cbe159af45798ac9fef534260",
      "tree": "d00548a034b3092f8f42086f348c70b784c1df5e",
      "parents": [
        "0c75a3ed633419d75d823d5dcb05d42924c6ae61"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Feb 13 12:43:56 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 16:25:12 2009 -0500"
      },
      "message": "ftrace: add do_for_each_ftrace_rec and while_for_each_ftrace_rec\n\nImpact: clean up\n\nTo iterate over all the functions that dynamic trace knows about\nit requires two for loops. One to iterate over the pages and the\nother to iterate over the records within the page.\n\nThere are several duplications of these loops in ftrace.c. This\npatch creates the macros do_for_each_ftrace_rec and\nwhile_for_each_ftrace_rec to handle this logic, and removes the\nduplicate code.\n\nWhile making this change, I also discovered and fixed a small\nbug that one of the iterations should exit the loop after it found the\nrecord it was searching for. This used a break when it should have\nused a goto, since there were two loops it needed to break out\nfrom.  No real harm was done by this bug since it would only continue\nto search the other records, and the code was in a slow path anyway.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "0c75a3ed633419d75d823d5dcb05d42924c6ae61",
      "tree": "1878804d15a37d1c1603d906933cee0e7b5c8787",
      "parents": [
        "5fb896a4e916e72efec4772b66be1cce3d6a9143"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 11:21:52 2009 -0500"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Mon Feb 16 16:21:35 2009 -0500"
      },
      "message": "ftrace: state that all functions are enabled in set_ftrace_filter\n\nImpact: clean up, make set_ftrace_filter less confusing\n\nThe set_ftrace_filter shows only the functions that will be traced.\nBut when it is empty, it will trace all functions. This can be a bit\nconfusing.\n\nThis patch makes set_ftrace_filter show:\n\n  #### all functions enabled ####\n\nWhen all functions will be traced, and we do not filter only a select\nfew.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "57794a9d48b63e34acbe63282628c9f029603308",
      "tree": "ed42d073f82cd91b8d8a331c60814aa699c3293d",
      "parents": [
        "a81bd80a0b0a405dc0483e2c428332d69da2c79f"
      ],
      "author": {
        "name": "Wenji Huang",
        "email": "wenji.huang@oracle.com",
        "time": "Fri Feb 06 17:33:27 2009 +0800"
      },
      "committer": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Sat Feb 07 20:03:36 2009 -0500"
      },
      "message": "trace: trivial fixes in comment typos.\n\nImpact: clean up\n\nFixed several typos in the comments.\n\nSigned-off-by: Wenji Huang \u003cwenji.huang@oracle.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\n"
    },
    {
      "commit": "ce70a0b472e06feae3a580ecb3fbef1e1e020a9b",
      "tree": "46e8a2ef0c91fae86a735ee08add6cd6519ee74f",
      "parents": [
        "939b366977d29b5c0d53d1ea3b0b8cefb1e76202",
        "79fb0768fbd371f3b94d909f51f587b3a24ab272",
        "229c4ef8ae56d69f8dec64533bf1c7f8070c1a4a"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Feb 04 20:45:41 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Feb 04 20:45:41 2009 +0100"
      },
      "message": "Merge branches \u0027tracing/blktrace\u0027, \u0027tracing/ftrace\u0027, \u0027tracing/urgent\u0027 and \u0027linus\u0027 into tracing/core\n"
    },
    {
      "commit": "229c4ef8ae56d69f8dec64533bf1c7f8070c1a4a",
      "tree": "e13a9ef3602f945ae51b73b592c8ae4d29e67ca3",
      "parents": [
        "b1792e367053968f2ddb48bc911d314143ce6242"
      ],
      "author": {
        "name": "Oleg Nesterov",
        "email": "oleg@redhat.com",
        "time": "Tue Feb 03 20:39:04 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Feb 03 22:50:58 2009 +0100"
      },
      "message": "ftrace: do_each_pid_task() needs rcu lock\n\n\"ftrace: use struct pid\" commit 978f3a45d9499c7a447ca7615455cefb63d44165\nconverted ftrace_pid_trace to \"struct pid*\".\n\nBut we can\u0027t use do_each_pid_task() without rcu_read_lock() even if\nwe know the pid itself can\u0027t go away (it was pinned in ftrace_pid_write).\nThe exiting task can detach itself from this pid at any moment.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "00f57f545afa422db3003b0d0b30a30f8de7ecb2",
      "tree": "02d5fc02d95987015b3051a63e7c481a28be4f47",
      "parents": [
        "082605de5f82eb692cc90f7fda071cc01bb5ac34"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Wed Jan 14 13:33:27 2009 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jan 21 15:21:30 2009 +0100"
      },
      "message": "tracing/function-graph-tracer: fix a regression while suspend to disk\n\nImpact: fix a crash while kernel image restore\n\nWhen the function graph tracer is running and while suspend to disk, some racy\nand dangerous things happen against this tracer.\n\nThe current task will save its registers including the stack pointer which\ncontains the return address hooked by the tracer. But the current task will\ncontinue to enter other functions after that to save the memory, and then\nit will store other return addresses, and finally loose the old depth which\nmatches the return address saved in the old stack (during the registers saving).\n\nSo on image restore, the code will return to wrong addresses.\nAnd there are other things: on restore, the task will have it\u0027s \"current\"\npointer overwritten during registers restoring....switching from one task to\nanother... That would be insane to try to trace function graphs at these\nstages.\n\nThis patch makes the function graph tracer listening on power events, making\nit\u0027s tracing disabled for the current task (the one that performs the\nhibernation work) while suspend/resume to disk, making the tracing safe\nduring hibernation.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "4a2b8dda3f8705880ec7408135645602d5590f51",
      "tree": "94e13c979bd20c5aeb67b1cc5aadf87f8a47b25a",
      "parents": [
        "0ee6b6cf5bdb793b4c68507dd65adf16341aa4ca"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Wed Jan 14 13:33:27 2009 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Jan 15 09:47:40 2009 +0100"
      },
      "message": "tracing/function-graph-tracer: fix a regression while suspend to disk\n\nImpact: fix a crash while kernel image restore\n\nWhen the function graph tracer is running and while suspend to disk, some racy\nand dangerous things happen against this tracer.\n\nThe current task will save its registers including the stack pointer which\ncontains the return address hooked by the tracer. But the current task will\ncontinue to enter other functions after that to save the memory, and then\nit will store other return addresses, and finally loose the old depth which\nmatches the return address saved in the old stack (during the registers saving).\n\nSo on image restore, the code will return to wrong addresses.\nAnd there are other things: on restore, the task will have it\u0027s \"current\"\npointer overwritten during registers restoring....switching from one task to\nanother... That would be insane to try to trace function graphs at these\nstages.\n\nThis patch makes the function graph tracer listening on power events, making\nit\u0027s tracing disabled for the current task (the one that performs the\nhibernation work) while suspend/resume to disk, making the tracing safe\nduring hibernation.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "32632920a788fb13da35b131b77cc4324c38c1c5",
      "tree": "41856b41a8ea41674aaf00270c36a4691c690622",
      "parents": [
        "e1d8aa9f1dd655a3534b22fcfbecb70cdb125766"
      ],
      "author": {
        "name": "Uwe Kleine-Koenig",
        "email": "u.kleine-koenig@pengutronix.de",
        "time": "Mon Jan 12 23:35:50 2009 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jan 14 12:11:49 2009 +0100"
      },
      "message": "ftrace, trivial: fix typo \"resgister\" -\u003e \"register\"\n\nSigned-off-by: Uwe Kleine-Koenig \u003cukleinek@strlen.de\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "f00012074b1a1a67d9c8603617bbbab267347ca6",
      "tree": "7a5ec4d30a513914277ccaa607ff88ecf294f84a",
      "parents": [
        "25aac9dc7c8c73798c1be8aa36141f980d32579e"
      ],
      "author": {
        "name": "Shaohua Li",
        "email": "shaohua.li@intel.com",
        "time": "Fri Jan 09 11:29:42 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jan 14 12:11:18 2009 +0100"
      },
      "message": "ftrace, ia64: Add macro for ftrace_caller\n\nDefine FTRACE_ADDR. In IA64, a function pointer isn\u0027t a \u0027unsigned long\u0027 but a\n\u0027struct {unsigned long ip, unsigned long gp}\u0027.\n\nSigned-off-by: Shaohua Li \u003cshaohua.li@intel.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "25aac9dc7c8c73798c1be8aa36141f980d32579e",
      "tree": "c1779bc208f76c80a5fe018ae129b19f64afec3d",
      "parents": [
        "18c167fd6d8feec5d337bd8fbc3a17da4cc37652"
      ],
      "author": {
        "name": "Shaohua Li",
        "email": "shaohua.li@intel.com",
        "time": "Fri Jan 09 11:29:40 2009 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jan 14 12:11:13 2009 +0100"
      },
      "message": "ftrace, ia64: explictly ignore a file in recordmcount.pl\n\nIn IA64, a function pointer isn\u0027t a \u0027unsigned long\u0027 but a\n\u0027struct {unsigned long ip, unsigned long gp}\u0027. MCOUNT_ADDR is determined\nat link time not compile time, so explictly ignore kernel/trace/ftrace.o\nin recordmcount.pl.\n\nSigned-off-by: Shaohua Li \u003cshaohua.li@intel.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "431aa3fbf5bbe3be79809c7e603c2ed2ac64b015",
      "tree": "a61e6a869388ab58b02bf2f0ac6931c5932fe675",
      "parents": [
        "99793e3dbe39a50d871eedc361659a894601e2bf"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Jan 06 12:43:01 2009 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Jan 07 10:43:52 2009 +0100"
      },
      "message": "ftrace: convert unsigned index to signed\n\nImpact: fix to unsigned compared to less than zero\n\nRoel Kluin pointed out that there is a compare of an unsigned number\nto less than zero. A previous clean up had the unsigned index set\nto -1 for certain cases, but never converted it to signed.\n\nFrederic Weisbecker noticed that another index is used to compare\nthe above index to and it also needs to be converted to signed.\n\n[\n  Converted ftrace_page-\u003eindex to int from unsigned long as\n  Andrew Morton pointed out that there\u0027s no need for it to\n  stay a long.\n]\n\nReported-by: Roel Kluin \u003croel.kluin@gmail.com\u003e\nReported-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ea3a6d6d60b2504c573fe3415f6617e8310c0236",
      "tree": "3c0887bebd1986107d9bf206c252f626dcf32b64",
      "parents": [
        "e05a43b744fb9518cbf8539a7ef33164ac60a70f"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Dec 17 15:05:36 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 18 12:57:09 2008 +0100"
      },
      "message": "ftrace: add not to regex on filtering functions\n\nImpact: enhancement\n\nIngo Molnar has asked about a way to remove items from the filter\nlists. Currently, you can only add or replace items. The way\nitems are added to the list is through opening one of the list\nfiles (set_ftrace_filter or set_ftrace_notrace) via append.\nIf the file is opened for truncate, the list is cleared.\n\n  echo spin_lock \u003e /debug/tracing/set_ftrace_filter\n\nThe above will replace the list with only spin_lock\n\n  echo spin_lock \u003e\u003e /debug/tracing/set_ftrace_filter\n\nThe above will add spin_lock to the list.\n\nNow this patch adds:\n\n  echo \u0027!spin_lock\u0027 \u003e\u003e /debug/tracing/set_ftrace_filter\n\nThis will remove spin_lock from the list.\n\nThe limited glob features of these lists also can be notted.\n\n  echo \u0027!spin_*\u0027 \u003e\u003e /debug/tracing/set_ftrace_filter\n\nThis will remove all functions that start with \u0027spin_\u0027\n\nNote:\n\n  echo \u0027!spin_*\u0027 \u003e /debug/tracing/set_ftrace_filter\n\nwill simply clear out the list (notice the \u0027\u003e\u0027 instead of \u0027\u003e\u003e\u0027)\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "380c4b1411ccd6885f92b2c8ceb08433a720f44e",
      "tree": "f3b571e1caff2de3e6b4cace87c2b1ec332667d7",
      "parents": [
        "8e1b82e0866befaa0b2920be296c6e4c3fc7f422"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sat Dec 06 03:43:41 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Dec 08 15:11:45 2008 +0100"
      },
      "message": "tracing/function-graph-tracer: append the tracing_graph_flag\n\nImpact: Provide a way to pause the function graph tracer\n\nAs suggested by Steven Rostedt, the previous patch that prevented from\nspinlock function tracing shouldn\u0027t use the raw_spinlock to fix it.\nIt\u0027s much better to follow lockdep with normal spinlock, so this patch\nadds a new flag for each task to make the function graph tracer able\nto be paused. We also can send an ftrace_printk whithout worrying of\nthe irrelevant traced spinlock during insertion.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "21bbecdaaef3a6acc19905ab88c0587817318870",
      "tree": "d6fd3e222509eb470786ae9c0b1cd9af09f09714",
      "parents": [
        "21a8c466f99063eeb8567318b4e305eda9015408"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Thu Dec 04 23:30:56 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Dec 05 14:51:29 2008 +0100"
      },
      "message": "ftrace: use init_struct_pid as swapper pid\n\nImpact: clean up\n\nUsing (struct pid *)-1 as the pointer for ftrace_swapper_pid is\na little confusing for others. This patch uses the address of the\nactual init pid structure instead. This change is only for\nclarity. It does not affect the code itself. Hopefully soon the\nswapper tasks will all have their own pid structure and then\nwe can clean up the code a bit more.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "faec2ec505d397e9426754722b6e80d519c4938f",
      "tree": "574d290807a5bdf1bb41325ce6855aecf872e1b5",
      "parents": [
        "6b2539302bee8e88c99e3c7d80c16a04dbe5e2ad"
      ],
      "author": {
        "name": "Liming Wang",
        "email": "liming.wang@windriver.com",
        "time": "Thu Dec 04 14:24:49 2008 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 04 09:42:35 2008 +0100"
      },
      "message": "ftrace: avoid duplicated function when writing set_graph_function\n\nImpact: fix a bug in function filter setting\n\nwhen writing function to set_graph_function, we should check whether it\nhas existed in set_graph_function to avoid duplicating.\n\nSigned-off-by: Liming Wang \u003climing.wang@windriver.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "e32d89569128e76bdf84867be0928902ca9f7555",
      "tree": "f82014ad89c0cf6f392778d9abb6060a04d458e6",
      "parents": [
        "978f3a45d9499c7a447ca7615455cefb63d44165"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Thu Dec 04 00:26:41 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 04 09:09:38 2008 +0100"
      },
      "message": "ftrace: add ability to only trace swapper tasks\n\nImpact: new feature\n\nThis patch lets the swapper tasks of all CPUS be filtered by the\nset_ftrace_pid file.\n\nIf \u00270\u0027 is echoed into this file, then all the idle tasks (aka swapper)\nis flagged to be traced.  This affects all CPU idle tasks.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "978f3a45d9499c7a447ca7615455cefb63d44165",
      "tree": "13a59046c8fe7ae3a095444515cd50c0a57727b3",
      "parents": [
        "5ef6476190d24419a9a537baa0b5641845136989"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Thu Dec 04 00:26:40 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 04 09:09:37 2008 +0100"
      },
      "message": "ftrace: use struct pid\n\nImpact: clean up, extend PID filtering to PID namespaces\n\nEric Biederman suggested using the struct pid for filtering on\npids in the kernel. This patch is based off of a demonstration\nof an implementation that Eric sent me in an email.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "804a685162a7080386714166776f57255a75238e",
      "tree": "f7b79000146532c0ad6571440652368e2521119a",
      "parents": [
        "0ef8cde56ab92ab3f65221246dc1622c6b5068b3"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Dec 03 15:36:59 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 04 09:09:36 2008 +0100"
      },
      "message": "ftrace: trace single pid for function graph tracer\n\nImpact: New feature\n\nThis patch makes the changes to set_ftrace_pid apply to the function\ngraph tracer.\n\n  # echo $$ \u003e /debugfs/tracing/set_ftrace_pid\n  # echo function_graph \u003e /debugfs/tracing/current_tracer\n\nWill cause only the current task to be traced. Note, the trace flags are\nalso inherited by child processes, so the children of the shell\nwill also be traced.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "0ef8cde56ab92ab3f65221246dc1622c6b5068b3",
      "tree": "47bbb117a76146a5f5b949f00cf743dd3b31f873",
      "parents": [
        "ea4e2bc4d9f7370e57a343ccb5e7c0ad3222ec3c"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Dec 03 15:36:58 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 04 09:09:35 2008 +0100"
      },
      "message": "ftrace: use task struct trace flag to filter on pid\n\nImpact: clean up\n\nUse the new task struct trace flags to determine if a process should be\ntraced or not.\n\nNote: this moves the searching of the pid to the slow path of setting\nthe pid field. This needs to be converted to the pid name space.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ea4e2bc4d9f7370e57a343ccb5e7c0ad3222ec3c",
      "tree": "64a4a1d9d7d3de0695cb2e8c7161886ab660e311",
      "parents": [
        "b29144c317fb748dae6d72c0f88eda9d43165b8d"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Dec 03 15:36:57 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Dec 04 09:09:34 2008 +0100"
      },
      "message": "ftrace: graph of a single function\n\nThis patch adds the file:\n\n   /debugfs/tracing/set_graph_function\n\nwhich can be used along with the function graph tracer.\n\nWhen this file is empty, the function graph tracer will act as\nusual. When the file has a function in it, the function graph\ntracer will only trace that function.\n\nFor example:\n\n # echo blk_unplug \u003e /debugfs/tracing/set_graph_function\n # cat /debugfs/tracing/trace\n [...]\n ------------------------------------------\n | 2)  make-19003  \u003d\u003e  kjournald-2219\n ------------------------------------------\n\n 2)               |  blk_unplug() {\n 2)               |    dm_unplug_all() {\n 2)               |      dm_get_table() {\n 2)      1.381 us |        _read_lock();\n 2)      0.911 us |        dm_table_get();\n 2)      1. 76 us |        _read_unlock();\n 2) +   12.912 us |      }\n 2)               |      dm_table_unplug_all() {\n 2)               |        blk_unplug() {\n 2)      0.778 us |          generic_unplug_device();\n 2)      2.409 us |        }\n 2)      5.992 us |      }\n 2)      0.813 us |      dm_table_put();\n 2) +   29. 90 us |    }\n 2) +   34.532 us |  }\n\nYou can add up to 32 functions into this file. Currently we limit it\nto 32, but this may change with later improvements.\n\nTo add another function, use the append \u0027\u003e\u003e\u0027:\n\n  # echo sys_read \u003e\u003e /debugfs/tracing/set_graph_function\n  # cat /debugfs/tracing/set_graph_function\n  blk_unplug\n  sys_read\n\nUsing the \u0027\u003e\u0027 will clear out the function and write anew:\n\n  # echo sys_write \u003e /debug/tracing/set_graph_function\n  # cat /debug/tracing/set_graph_function\n  sys_write\n\nNote, if you have function graph running while doing this, the small\ntime between clearing it and updating it will cause the graph to\nrecord all functions. This should not be an issue because after\nit sets the filter, only those functions will be recorded from then on.\nIf you need to only record a particular function then set this\nfile first before starting the function graph tracer. In the future\nthis side effect may be corrected.\n\nThe set_graph_function file is similar to the set_ftrace_filter but\nit does not take wild cards nor does it allow for more than one\nfunction to be set with a single write. There is no technical reason why\nthis is the case, I just do not have the time yet to implement that.\n\nNote, dynamic ftrace must be enabled for this to appear because it\nuses the dynamic ftrace records to match the name to the mcount\ncall sites.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "e49dc19c6a19ea112fcb94b7c62ec62cdd5c08aa",
      "tree": "851dcdfe321e16a327d656ecd7040ef6e8590bec",
      "parents": [
        "7ee991fbc6f947e9b04f29c9c6c1d057d0671a16"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Dec 02 23:50:05 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Dec 03 08:56:26 2008 +0100"
      },
      "message": "ftrace: function graph return for function entry\n\nImpact: feature, let entry function decide to trace or not\n\nThis patch lets the graph tracer entry function decide if the tracing\nshould be done at the end as well. This requires all function graph\nentry functions return 1 if it should trace, or 0 if the return should\nnot be traced.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "14a866c567e040ccf6240d68b083dd1dbbde63e6",
      "tree": "4e8d62ecc345d44e7cd45f973ffb931070637532",
      "parents": [
        "bb4304c71c97bf727ec43cd2f195c2c237c27fd3"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Tue Dec 02 23:50:02 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Dec 03 08:56:23 2008 +0100"
      },
      "message": "ftrace: add ftrace_graph_stop()\n\nImpact: new ftrace_graph_stop function\n\nWhile developing more features of function graph, I hit a bug that\ncaused the WARN_ON to trigger in the prepare_ftrace_return function.\nWell, it was hard for me to find out that was happening because the\nbug would not print, it would just cause a hard lockup or reboot.\nThe reason is that it is not safe to call printk from this function.\n\nLooking further, I also found that it calls unregister_ftrace_graph,\nwhich grabs a mutex and calls kstop machine. This would definitely\nlock the box up if it were to trigger.\n\nThis patch adds a fast and safe ftrace_graph_stop() which will\nstop the function tracer. Then it is safe to call the WARN ON.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "f0461d0146ee30927bc7efa2ae24ea8c6693b725",
      "tree": "6a6b416c76c0e1a569af5531454fb45fe06e07ba",
      "parents": [
        "66eafebc1086014709dc38f52ddcb3d67d9b346c",
        "48d68b20d00865035b8b65e69af343d0f53fac9d"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Dec 03 08:49:21 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Dec 03 08:49:21 2008 +0100"
      },
      "message": "Merge branches \u0027tracing/ftrace\u0027 and \u0027tracing/function-graph-tracer\u0027 into tracing/core\n"
    },
    {
      "commit": "48d68b20d00865035b8b65e69af343d0f53fac9d",
      "tree": "eca27c0cf9486ae83c7e3193709abae099d1f019",
      "parents": [
        "222658e08f72cd539d01f3aabdc258c596f487e2"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Tue Dec 02 00:20:39 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Dec 02 09:47:48 2008 +0100"
      },
      "message": "tracing/function-graph-tracer: support for x86-64\n\nImpact: extend and enable the function graph tracer to 64-bit x86\n\nThis patch implements the support for function graph tracer under x86-64.\nBoth static and dynamic tracing are supported.\n\nThis causes some small CPP conditional asm on arch/x86/kernel/ftrace.c I\nwanted to use probe_kernel_read/write to make the return address\nsaving/patching code more generic but it causes tracing recursion.\n\nThat would be perhaps useful to implement a notrace version of these\nfunction for other archs ports.\n\nNote that arch/x86/process_64.c is not traced, as in X86-32. I first\nthought __switch_to() was responsible of crashes during tracing because I\nbelieved current task were changed inside but that\u0027s actually not the\ncase (actually yes, but not the \"current\" pointer).\n\nSo I will have to investigate to find the functions that harm here, to\nenable tracing of the other functions inside (but there is no issue at\nthis time, while process_64.c stays out of -pg flags).\n\nA little possible race condition is fixed inside this patch too. When the\ntracer allocate a return stack dynamically, the current depth is not\ninitialized before but after. An interrupt could occur at this time and,\nafter seeing that the return stack is allocated, the tracer could try to\ntrace it with a random uninitialized depth. It\u0027s a prevention, even if I\nhadn\u0027t problems with it.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Tim Bird \u003ctim.bird@am.sony.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "66eafebc1086014709dc38f52ddcb3d67d9b346c",
      "tree": "10147e635d8d4d15d73cb23baa32a2357570eab0",
      "parents": [
        "222658e08f72cd539d01f3aabdc258c596f487e2"
      ],
      "author": {
        "name": "Liming Wang",
        "email": "liming.wang@windriver.com",
        "time": "Tue Dec 02 10:33:08 2008 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Tue Dec 02 09:23:24 2008 +0100"
      },
      "message": "function trace: fix a bug of single thread function trace\n\nImpact: fix \"no output from tracer\" bug caused by ftrace_update_pid_func()\n\nWhen disabling single thread function trace using\n\"echo -1 \u003e set_ftrace_pid\", the normal function trace\nhas to restore to original function, otherwise the normal\nfunction trace will not work well.\n\nWithout this commit, something like below:\n\n\t$ ps |grep 850\n\t  850 root      2556 S    -/bin/sh\n\t$ echo 850 \u003e /debug/tracing/set_ftrace_pid\n\t$ echo function \u003e /debug/tracing/current_tracer\n\t$ echo 1 \u003e /debug/tracing/tracing_enabled\n\t$ sleep 1\n\t$ echo 0 \u003e /debug/tracing/tracing_enabled\n\t$ cat /debug/tracing/trace_pipe |wc -l\n\t59704\n\t$ echo -1 \u003e /debug/tracing/set_ftrace_pid\n\t$ echo 1 \u003e /debug/tracing/tracing_enabled\n\t$ sleep 1\n\t$ echo 0 \u003e /debug/tracing/tracing_enabled\n\t$ more /debug/tracing/trace_pipe\n\t\t\u003c\u003d\u003d\u003d\u003d\u003d\u003d nothing output now!\n\t\t\tit should output trace record.\n\nSigned-off-by: Liming Wang \u003climing.wang@windriver.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "50cdaf08a8ec1d7f43987705da7aff7cf949708f",
      "tree": "b8c1b6072d907a196df4ef556cf6c0070b289b38",
      "parents": [
        "c7cc77307669336a08928ab8668bdb3f3bcc021b"
      ],
      "author": {
        "name": "Liming Wang",
        "email": "liming.wang@windriver.com",
        "time": "Fri Nov 28 12:13:21 2008 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Fri Nov 28 12:30:40 2008 +0100"
      },
      "message": "ftrace: improve seq_operation of ftrace\n\nImpact: make ftrace position computing more sane\n\nFirst remove useless -\u003epos field. Then we needn\u0027t check seq_printf\nin .show like other place.\n\nSigned-off-by: Liming Wang \u003climing.wang@windriver.com\u003e\nReviewed-by: Bruce Ashfield \u003cbruce.ashfield@windriver.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "e53a6319cca69111c1643dc9f18f4465d7f1cbf0",
      "tree": "867bd86a05aa590516aaa60221f297017cd31781",
      "parents": [
        "5a45cfe1c64862e8cd3b0d79d7c4ba71c3118915"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Wed Nov 26 00:16:25 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Nov 26 06:52:55 2008 +0100"
      },
      "message": "ftrace: let function tracing and function return run together\n\nImpact: feature\n\nThis patch enables function tracing and function return to run together.\nI\u0027ve tested this by enabling the stack tracer and return tracer, where\nboth the function entry and function return are used together with\ndynamic ftrace.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "5a45cfe1c64862e8cd3b0d79d7c4ba71c3118915",
      "tree": "0a7edf3a9dc88d74b7c7053445ac8aff033a75fa",
      "parents": [
        "df4fc31558dd2a3a30292ddb3a64c2a5befcec73"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "rostedt@goodmis.org",
        "time": "Wed Nov 26 00:16:24 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Nov 26 06:52:54 2008 +0100"
      },
      "message": "ftrace: use code patching for ftrace graph tracer\n\nImpact: more efficient code for ftrace graph tracer\n\nThis patch uses the dynamic patching, when available, to patch\nthe function graph code into the kernel.\n\nThis patch will ease the way for letting both function tracing\nand function graph tracing run together.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "df4fc31558dd2a3a30292ddb3a64c2a5befcec73",
      "tree": "e7e57093541568a039175aa846fe135f6ba575e2",
      "parents": [
        "c2324b694fa8ffee382a124198c68754088e483c"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Wed Nov 26 00:16:23 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Nov 26 06:52:52 2008 +0100"
      },
      "message": "ftrace: add function tracing to single thread\n\nImpact: feature to function trace a single thread\n\nThis patch adds the ability to function trace a single thread.\nThe file:\n\n  /debugfs/tracing/set_ftrace_pid\n\ncontains the pid to trace. Valid pids are any positive integer.\nWriting any negative number to this file will disable the pid\ntracing and the function tracer will go back to tracing all of\nthreads.\n\nThis feature works with both static and dynamic function tracing.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "287b6e68ca7209caec40b2f44f837c580a413bae",
      "tree": "b0867d75868f6049dc5747bd39fdae2d477dde66",
      "parents": [
        "fb52607afcd0629776f1dc9e657647ceae81dd50"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Wed Nov 26 00:57:25 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Nov 26 01:59:45 2008 +0100"
      },
      "message": "tracing/function-return-tracer: set a more human readable output\n\nImpact: feature\n\nThis patch sets a C-like output for the function graph tracing.\nFor this aim, we now call two handler for each function: one on the entry\nand one other on return. This way we can draw a well-ordered call stack.\n\nThe pid of the previous trace is loosely stored to be compared against\nthe one of the current trace to see if there were a context switch.\n\nWithout this little feature, the call tree would seem broken at\nsome locations.\nWe could use the sched_tracer to capture these sched_events but this\nway of processing is much more simpler.\n\n2 spaces have been chosen for indentation to fit the screen while deep\ncalls. The time of execution in nanosecs is printed just after closed\nbraces, it seems more easy this way to find the corresponding function.\nIf the time was printed as a first column, it would be not so easy to\nfind the corresponding function if it is called on a deep depth.\n\nI plan to output the return value but on 32 bits CPU, the return value\ncan be 32 or 64, and its difficult to guess on which case we are.\nI don\u0027t know what would be the better solution on X86-32: only print\neax (low-part) or even edx (high-part).\n\nActually it\u0027s thee same problem when a function return a 8 bits value, the\nhigh part of eax could contain junk values...\n\nHere is an example of trace:\n\nsys_read() {\n  fget_light() {\n  } 526\n  vfs_read() {\n    rw_verify_area() {\n      security_file_permission() {\n        cap_file_permission() {\n        } 519\n      } 1564\n    } 2640\n    do_sync_read() {\n      pipe_read() {\n        __might_sleep() {\n        } 511\n        pipe_wait() {\n          prepare_to_wait() {\n          } 760\n          deactivate_task() {\n            dequeue_task() {\n              dequeue_task_fair() {\n                dequeue_entity() {\n                  update_curr() {\n                    update_min_vruntime() {\n                    } 504\n                  } 1587\n                  clear_buddies() {\n                  } 512\n                  add_cfs_task_weight() {\n                  } 519\n                  update_min_vruntime() {\n                  } 511\n                } 5602\n                dequeue_entity() {\n                  update_curr() {\n                    update_min_vruntime() {\n                    } 496\n                  } 1631\n                  clear_buddies() {\n                  } 496\n                  update_min_vruntime() {\n                  } 527\n                } 4580\n                hrtick_update() {\n                  hrtick_start_fair() {\n                  } 488\n                } 1489\n              } 13700\n            } 14949\n          } 16016\n          msecs_to_jiffies() {\n          } 496\n          put_prev_task_fair() {\n          } 504\n          pick_next_task_fair() {\n          } 489\n          pick_next_task_rt() {\n          } 496\n          pick_next_task_fair() {\n          } 489\n          pick_next_task_idle() {\n          } 489\n\n------------8\u003c---------- thread 4 ------------8\u003c----------\n\nfinish_task_switch() {\n} 1203\ndo_softirq() {\n  __do_softirq() {\n    __local_bh_disable() {\n    } 669\n    rcu_process_callbacks() {\n      __rcu_process_callbacks() {\n        cpu_quiet() {\n          rcu_start_batch() {\n          } 503\n        } 1647\n      } 3128\n      __rcu_process_callbacks() {\n      } 542\n    } 5362\n    _local_bh_enable() {\n    } 587\n  } 8880\n} 9986\nkthread_should_stop() {\n} 669\ndeactivate_task() {\n  dequeue_task() {\n    dequeue_task_fair() {\n      dequeue_entity() {\n        update_curr() {\n          calc_delta_mine() {\n          } 511\n          update_min_vruntime() {\n          } 511\n        } 2813\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "fb52607afcd0629776f1dc9e657647ceae81dd50",
      "tree": "7bf43b41ff8510d3098c089913cce56a9049f0fd",
      "parents": [
        "509dceef6470442d8c7b8a43ec34125205840b3c"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Tue Nov 25 21:07:04 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Nov 26 01:59:45 2008 +0100"
      },
      "message": "tracing/function-return-tracer: change the name into function-graph-tracer\n\nImpact: cleanup\n\nThis patch changes the name of the \"return function tracer\" into\nfunction-graph-tracer which is a more suitable name for a tracing\nwhich makes one able to retrieve the ordered call stack during\nthe code flow.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nAcked-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "eae849ca034c7f1015f0a6f17421ebc737f0a069",
      "tree": "f247bac71fd0fe4fa80bde31ccf3dcca2bda74d1",
      "parents": [
        "82f60f0bc854aada696f27d863c03bef91f1509d"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sun Nov 23 17:33:12 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 23 17:39:03 2008 +0100"
      },
      "message": "tracing/function-return-tracer: don\u0027t trace kfree while it frees the return stack\n\nImpact: fix a crash\n\nWhile I killed the cat process, I got sometimes the following (but rare)\ncrash:\n\n[   65.689027] Pid: 2969, comm: cat Not tainted (2.6.28-rc6-tip #83) AMILO Li 2727\n[   65.689027] EIP: 0060:[\u003c00000000\u003e] EFLAGS: 00010082 CPU: 1\n[   65.689027] EIP is at 0x0\n[   65.689027] EAX: 00000000 EBX: f66cd780 ECX: c019a64a EDX: f66cd780\n[   65.689027] ESI: 00000286 EDI: f66cd780 EBP: f630be2c ESP: f630be24\n[   65.689027]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068\n[   65.689027] Process cat (pid: 2969, ti\u003df630a000 task\u003df66cd780 task.ti\u003df630a000)\n[   65.689027] Stack:\n[   65.689027]  00000012 f630bd54 f630be7c c012c853 00000000 c0133cc9 f66cda54 f630be5c\n[   65.689027]  f630be68 f66cda54 f66cd88c f66cd878 f7070000 00000001 f630be90 c0135dbc\n[   65.689027]  f614a614 f630be68 f630be68 f65ba200 00000002 f630bf10 f630be90 c012cad6\n[   65.689027] Call Trace:\n[   65.689027]  [\u003cc012c853\u003e] ? do_exit+0x603/0x850\n[   65.689027]  [\u003cc0133cc9\u003e] ? next_signal+0x9/0x40\n[   65.689027]  [\u003cc0135dbc\u003e] ? dequeue_signal+0x8c/0x180\n[   65.689027]  [\u003cc012cad6\u003e] ? do_group_exit+0x36/0x90\n[   65.689027]  [\u003cc013709c\u003e] ? get_signal_to_deliver+0x20c/0x390\n[   65.689027]  [\u003cc0102b69\u003e] ? do_notify_resume+0x99/0x8b0\n[   65.689027]  [\u003cc02e6d1a\u003e] ? tty_ldisc_deref+0x5a/0x80\n[   65.689027]  [\u003cc014db9b\u003e] ? trace_hardirqs_on+0xb/0x10\n[   65.689027]  [\u003cc02e6d1a\u003e] ? tty_ldisc_deref+0x5a/0x80\n[   65.689027]  [\u003cc02e39b0\u003e] ? n_tty_write+0x0/0x340\n[   65.689027]  [\u003cc02e1812\u003e] ? redirected_tty_write+0x82/0x90\n[   65.689027]  [\u003cc019ee99\u003e] ? vfs_write+0x99/0xd0\n[   65.689027]  [\u003cc02e1790\u003e] ? redirected_tty_write+0x0/0x90\n[   65.689027]  [\u003cc019f342\u003e] ? sys_write+0x42/0x70\n[   65.689027]  [\u003cc01035ca\u003e] ? work_notifysig+0x13/0x19\n[   65.689027] Code:  Bad EIP value.\n[   65.689027] EIP: [\u003c00000000\u003e] 0x0 SS:ESP 0068:f630be24\n\nThis is because on do_exit(), kfree is called to free the return addresses stack\nbut kfree is traced and stored its return address in this stack.\nThis patch fixes it.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "f201ae2356c74bcae130b2177b3dca903ea98071",
      "tree": "c4b1b43fbe0a4594cb86749b2e7098fe15eb86ba",
      "parents": [
        "a0a70c735ef714fe1b6777b571630c3d50c7b008"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sun Nov 23 06:22:56 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 23 09:17:26 2008 +0100"
      },
      "message": "tracing/function-return-tracer: store return stack into task_struct and allocate it dynamically\n\nImpact: use deeper function tracing depth safely\n\nSome tests showed that function return tracing needed a more deeper depth\nof function calls. But it could be unsafe to store these return addresses\nto the stack.\n\nSo these arrays will now be allocated dynamically into task_struct of current\nonly when the tracer is activated.\n\nTypical scheme when tracer is activated:\n- allocate a return stack for each task in global list.\n- fork: allocate the return stack for the newly created task\n- exit: free return stack of current\n- idle init: same as fork\n\nI chose a default depth of 50. I don\u0027t have overruns anymore.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "3f8e402f34ecc7d1d00b54703d3baa401b8bdd78",
      "tree": "b1f515a1c5426809c076dd854f9385efb750683b",
      "parents": [
        "072b40a15616fe6bea68466e6bffcfcbf5c8f26f",
        "e7d3737ea1b102030f44e96c97754101e41515f0",
        "227a837567e339c74d9d4243d03a29bd943a018c",
        "5821e1b74f0d08952cb5da4bfd2d9a388d8df58e"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Nov 17 09:36:22 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Mon Nov 17 09:36:22 2008 +0100"
      },
      "message": "Merge branches \u0027tracing/branch-tracer\u0027, \u0027tracing/ftrace\u0027, \u0027tracing/function-return-tracer\u0027, \u0027tracing/tracepoints\u0027 and \u0027tracing/urgent\u0027 into tracing/core\n"
    },
    {
      "commit": "5821e1b74f0d08952cb5da4bfd2d9a388d8df58e",
      "tree": "e7bade7c500b2d4cd4d8c811a26c844c6f529366",
      "parents": [
        "ee51a1de7e3837577412be269e0100038068e691"
      ],
      "author": {
        "name": "walimis",
        "email": "walimisdev@gmail.com",
        "time": "Sat Nov 15 15:19:06 2008 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 08:32:05 2008 +0100"
      },
      "message": "function tracing: fix wrong pos computing when read buffer has been fulfilled\n\nImpact: make output of available_filter_functions complete\n\nphenomenon:\n\nThe first value of dyn_ftrace_total_info is not equal with\n`cat available_filter_functions | wc -l`, but they should be equal.\n\nroot cause:\n\nWhen printing functions with seq_printf in t_show, if the read buffer\nis just overflowed by current function record, then this function\nwon\u0027t be printed to user space through read buffer, it will\njust be dropped. So we can\u0027t see this function printing.\n\nSo, every time the last function to fill the read buffer, if overflowed,\nwill be dropped.\n\nThis also applies to set_ftrace_filter if set_ftrace_filter has\nmore bytes than read buffer.\n\nfix:\n\nThrough checking return value of seq_printf, if less than 0, we know\nthis function doesn\u0027t be printed. Then we decrease position to force\nthis function to be printed next time, in next read buffer.\n\nAnother little fix is to show correct allocating pages count.\n\nSigned-off-by: walimis \u003cwalimisdev@gmail.com\u003e\nAcked-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "e7d3737ea1b102030f44e96c97754101e41515f0",
      "tree": "44fdc3dea100d1fa639e6ba3cb1bfca2ab40e70b",
      "parents": [
        "b01c746617da5e260803eb10ed64ca043e9a1241"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sun Nov 16 06:02:06 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 07:57:38 2008 +0100"
      },
      "message": "tracing/function-return-tracer: support for dynamic ftrace on function return tracer\n\nThis patch adds the support for dynamic tracing on the function return tracer.\nThe whole difference with normal dynamic function tracing is that we don\u0027t need\nto hook on a particular callback. The only pro that we want is to nop or set\ndynamically the calls to ftrace_caller (which is ftrace_return_caller here).\n\nSome security checks ensure that we are not trying to launch dynamic tracing for\nreturn tracing while normal function tracing is already running.\n\nAn example of trace with getnstimeofday set as a filter:\n\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (2283 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1396 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1382 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1825 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1426 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1464 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1524 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1382 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1382 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1434 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1464 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1502 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1404 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1397 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1051 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1314 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1344 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1163 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1390 ns)\nktime_get_ts+0x22/0x50 -\u003e getnstimeofday (1374 ns)\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "ee02a2e5c88ca2e4d6921f08d037b46d5bf82641",
      "tree": "5ad2064cfb6de999b07a937c19438f3c6f888229",
      "parents": [
        "982c350b9ec4b3564d67f3627a274ae61bbc7e95"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Sat Nov 15 16:31:41 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 07:37:46 2008 +0100"
      },
      "message": "ftrace: make filtered functions effective on setting\n\nImpact: set filtered functions at time the filter is set\n\nIt can be confusing when the set_filter_functions is set (or cleared)\nand the functions being recorded by the dynamic tracer does not\nmatch.\n\nThis patch causes the code to be updated if the function tracer is\nenabled and the filter is changed.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "982c350b9ec4b3564d67f3627a274ae61bbc7e95",
      "tree": "c7ccd83698552997bcfe58ab7f61b8761d37957e",
      "parents": [
        "20e5227e9f55ae1969934821ccbf581563785bbe"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Sat Nov 15 16:31:41 2008 -0500"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 07:37:17 2008 +0100"
      },
      "message": "ftrace: fix dyn ftrace filter\n\nImpact: correct implementation of dyn ftrace filter\n\nThe old decisions made by the filter algorithm was complex and incorrect.\nThis lead to inconsistent enabling or disabling of functions when\nthe filter was used.\n\nThis patch simplifies that code and in doing so, corrects the usage\nof the filters.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "20e5227e9f55ae1969934821ccbf581563785bbe",
      "tree": "cac23dc66e00c7667f5c0e7adc72a76bd1041816",
      "parents": [
        "31e889098a80ceb3e9e3c555d522b2686a6663c6"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Nov 14 16:21:19 2008 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 07:36:42 2008 +0100"
      },
      "message": "ftrace: allow NULL pointers in mcount_loc\n\nImpact: make ftrace_convert_nops() more permissive\n\nDue to the way different architecture linkers combine the data sections\nof the mcount_loc (the section that lists all the locations that\ncall mcount), there may be zeros added in that section. This is usually\ndue to strange alignments that the linker performs, that pads in zeros.\n\nThis patch makes the conversion code to nops skip any pointer in\nthe mcount_loc section that is NULL.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "31e889098a80ceb3e9e3c555d522b2686a6663c6",
      "tree": "2acb73507de4191d4a9aa5ccf08fa24e7044c89e",
      "parents": [
        "d51ad7ac48f991c4a8834485727efa99a691cb87"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Nov 14 16:21:19 2008 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 07:36:02 2008 +0100"
      },
      "message": "ftrace: pass module struct to arch dynamic ftrace functions\n\nImpact: allow archs more flexibility on dynamic ftrace implementations\n\nDynamic ftrace has largly been developed on x86. Since x86 does not\nhave the same limitations as other architectures, the ftrace interaction\nbetween the generic code and the architecture specific code was not\nflexible enough to handle some of the issues that other architectures\nhave.\n\nMost notably, module trampolines. Due to the limited branch distance\nthat archs make in calling kernel core code from modules, the module\nload code must create a trampoline to jump to what will make the\nlarger jump into core kernel code.\n\nThe problem arises when this happens to a call to mcount. Ftrace checks\nall code before modifying it and makes sure the current code is what\nit expects. Right now, there is not enough information to handle modifying\nmodule trampolines.\n\nThis patch changes the API between generic dynamic ftrace code and\nthe arch dependent code. There is now two functions for modifying code:\n\n  ftrace_make_nop(mod, rec, addr) - convert the code at rec-\u003eip into\n       a nop, where the original text is calling addr. (mod is the\n       module struct if called by module init)\n\n  ftrace_make_caller(rec, addr) - convert the code rec-\u003eip that should\n       be a nop into a caller to addr.\n\nThe record \"rec\" now has a new field called \"arch\" where the architecture\ncan add any special attributes to each call site record.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "918c115410c6cc57033835b6a401e57697f9ea4f",
      "tree": "62d4f9d5c76f022f59cdb2a58e95d55c9c233799",
      "parents": [
        "b17e8a37a13d0e87165054714434534bb7e69f2d"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Nov 14 16:21:19 2008 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 07:30:17 2008 +0100"
      },
      "message": "ftrace: do not process freed records\n\nImpact: keep from converting freed records\n\nWhen the tracer is started or stopped, it converts all code pointed\nto by the saved records into callers to ftrace or nops. When modules\nare unloaded, their records are freed, but they still exist within\nthe record pages.\n\nThis patch changes the code to skip over freed records.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "b17e8a37a13d0e87165054714434534bb7e69f2d",
      "tree": "0acfd6ec460bfab35807eb6be058d946c380353e",
      "parents": [
        "f3c7ac40a99f4044b843e6e2c4f46ab2d354c563"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Nov 14 16:21:19 2008 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 07:30:07 2008 +0100"
      },
      "message": "ftrace: disable ftrace on anomalies in trace start and stop\n\nImpact: robust feature to disable ftrace on start or stop tracing on error\n\nCurrently only the initial conversion to nops will disable ftrace\non an anomaly. But if an anomaly happens on start or stopping of the\ntracer, it will silently fail.\n\nThis patch adds a check there too, to disable ftrace and warn if the\nconversion fails.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "f3c7ac40a99f4044b843e6e2c4f46ab2d354c563",
      "tree": "e4299e4cd9695adb6128eb3968d81a46f325b5c0",
      "parents": [
        "c91add5fa68ea9b1f2923b3788c5dae0e60e1f6b"
      ],
      "author": {
        "name": "Steven Rostedt",
        "email": "srostedt@redhat.com",
        "time": "Fri Nov 14 16:21:19 2008 -0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Sun Nov 16 07:29:53 2008 +0100"
      },
      "message": "ftrace: remove condition from ftrace_record_ip\n\nImpact: let module functions be recorded when dyn ftrace not enabled\n\nWhen dynamic ftrace had a daemon and a hash to record the locations\nof mcount callers at run time, the recording needed to stop when\nftrace was disabled. But now that the recording is done at compile time\nand the ftrace_record_ip is only called at boot up and when a module\nis loaded, we no longer need to check if ftrace_enabled is set.\nIn fact, this breaks module load if it is not set because we skip\nover module functions.\n\nSigned-off-by: Steven Rostedt \u003csrostedt@redhat.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "b3535c6390f27d04273e4eee0bc687f171fbf5f4",
      "tree": "a0160e2b70acc1743d6d3c68d149df9673d78fde",
      "parents": [
        "12ef7d448613ead2babd41c3ebfa1fe03c20edef"
      ],
      "author": {
        "name": "walimis",
        "email": "walimisdev@gmail.com",
        "time": "Fri Nov 14 00:21:02 2008 +0800"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Thu Nov 13 19:36:30 2008 +0100"
      },
      "message": "ftrace: remove unnecessary if condition of __unregister_ftrace_function\n\nBecause it has goto out before ftrace_list \u003d\u003d \u0026ftrace_list_end,\nthat\u0027s to say, we never meet this condition.\n\nSigned-off-by: walimis \u003cwalimisdev@gmail.com\u003e\nAcked-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n"
    },
    {
      "commit": "60a011c736e7dd09a0b01ca6a051a416f3f52ffb",
      "tree": "20e91db58c3bbfa622d3ed8ec747e4974a807284",
      "parents": [
        "d06bbd669539215405874d8fe32ab65105e6c4bb",
        "19b3e9671c5a219b8c34da2cc66e0ce7c3a501ae"
      ],
      "author": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Nov 12 10:17:09 2008 +0100"
      },
      "committer": {
        "name": "Ingo Molnar",
        "email": "mingo@elte.hu",
        "time": "Wed Nov 12 10:17:09 2008 +0100"
      },
      "message": "Merge branch \u0027tracing/function-return-tracer\u0027 into tracing/fastboot\n"
    }
  ],
  "next": "d06bbd669539215405874d8fe32ab65105e6c4bb"
}