)]}'
{
  "log": [
    {
      "commit": "d652e1eb8e7b739fccbfb503a3da3e9f640fbf3d",
      "tree": "55ab77bad0cbb045eac0b84b80d63f88f1ae09e6",
      "parents": [
        "8f55cea410dbc56114bb71a3742032070c8108d0",
        "77852fea6e2442a0e654a9292060489895de18c7"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Feb 19 18:19:48 2013 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Feb 19 18:19:48 2013 -0800"
      },
      "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull scheduler changes from Ingo Molnar:\n \"Main changes:\n\n   - scheduler side full-dynticks (user-space execution is undisturbed\n     and receives no timer IRQs) preparation changes that convert the\n     cputime accounting code to be full-dynticks ready, from Frederic\n     Weisbecker.\n\n   - Initial sched.h split-up changes, by Clark Williams\n\n   - select_idle_sibling() performance improvement by Mike Galbraith:\n\n        \" 1 tbench pair (worst case) in a 10 core + SMT package:\n\n          pre   15.22 MB/sec 1 procs\n          post 252.01 MB/sec 1 procs \"\n\n  - sched_rr_get_interval() ABI fix/change.  We think this detail is not\n    used by apps (so it\u0027s not an ABI in practice), but lets keep it\n    under observation.\n\n  - misc RT scheduling cleanups, optimizations\"\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)\n  sched/rt: Add \u003clinux/sched/rt.h\u003e header to \u003clinux/init_task.h\u003e\n  cputime: Remove irqsave from seqlock readers\n  sched, powerpc: Fix sched.h split-up build failure\n  cputime: Restore CPU_ACCOUNTING config defaults for PPC64\n  sched/rt: Move rt specific bits into new header file\n  sched/rt: Add a tuning knob to allow changing SCHED_RR timeslice\n  sched: Move sched.h sysctl bits into separate header\n  sched: Fix signedness bug in yield_to()\n  sched: Fix select_idle_sibling() bouncing cow syndrome\n  sched/rt: Further simplify pick_rt_task()\n  sched/rt: Do not account zero delta_exec in update_curr_rt()\n  cputime: Safely read cputime of full dynticks CPUs\n  kvm: Prepare to add generic guest entry/exit callbacks\n  cputime: Use accessors to read task cputime stats\n  cputime: Allow dynamic switch between tick/virtual based cputime accounting\n  cputime: Generic on-demand virtual cputime accounting\n  cputime: Move default nsecs_to_cputime() to jiffies based cputime file\n  cputime: Librarize per nsecs resolution cputime definitions\n  cputime: Avoid multiplication overflow on utime scaling\n  context_tracking: Export context state for generic vtime\n  ...\n\nFix up conflict in kernel/context_tracking.c due to comment additions.\n"
    },
    {
      "commit": "6a61671bb2f3a1bd12cd17b8fca811a624782632",
      "tree": "0afc2915fb7e517472710a49a524510322dd5baa",
      "parents": [
        "c11f11fcbdb5be790c565aed46411486a7586afc"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sun Dec 16 20:00:34 2012 +0100"
      },
      "committer": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sun Jan 27 20:35:47 2013 +0100"
      },
      "message": "cputime: Safely read cputime of full dynticks CPUs\n\nWhile remotely reading the cputime of a task running in a\nfull dynticks CPU, the values stored in utime/stime fields\nof struct task_struct may be stale. Its values may be those\nof the last kernel \u003c-\u003e user transition time snapshot and\nwe need to add the tickless time spent since this snapshot.\n\nTo fix this, flush the cputime of the dynticks CPUs on\nkernel \u003c-\u003e user transition and record the time / context\nwhere we did this. Then on top of this snapshot and the current\ntime, perform the fixup on the reader side from task_times()\naccessors.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: Li Zhong \u003czhong@linux.vnet.ibm.com\u003e\nCc: Namhyung Kim \u003cnamhyung.kim@lge.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n[fixed kvm module related build errors]\nSigned-off-by: Sedat Dilek \u003csedat.dilek@gmail.com\u003e\n"
    },
    {
      "commit": "abf917cd91cbb73952758f9741e2fa65002a48ee",
      "tree": "5f975b87615dcaed9c98bc74b4548d568b92dcbc",
      "parents": [
        "ae8dda5c473bf1a85913942adcaac449e5754bf3"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Wed Jul 25 07:56:04 2012 +0200"
      },
      "committer": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sun Jan 27 19:23:27 2013 +0100"
      },
      "message": "cputime: Generic on-demand virtual cputime accounting\n\nIf we want to stop the tick further idle, we need to be\nable to account the cputime without using the tick.\n\nVirtual based cputime accounting solves that problem by\nhooking into kernel/user boundaries.\n\nHowever implementing CONFIG_VIRT_CPU_ACCOUNTING require\nlow level hooks and involves more overhead. But we already\nhave a generic context tracking subsystem that is required\nfor RCU needs by archs which plan to shut down the tick\noutside idle.\n\nThis patch implements a generic virtual based cputime\naccounting that relies on these generic kernel/user hooks.\n\nThere are some upsides of doing this:\n\n- This requires no arch code to implement CONFIG_VIRT_CPU_ACCOUNTING\nif context tracking is already built (already necessary for RCU in full\ntickless mode).\n\n- We can rely on the generic context tracking subsystem to dynamically\n(de)activate the hooks, so that we can switch anytime between virtual\nand tick based accounting. This way we don\u0027t have the overhead\nof the virtual accounting when the tick is running periodically.\n\nAnd one downside:\n\n- There is probably more overhead than a native virtual based cputime\naccounting. But this relies on hooks that are already set anyway.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: Li Zhong \u003czhong@linux.vnet.ibm.com\u003e\nCc: Namhyung Kim \u003cnamhyung.kim@lge.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "4eacdf18374e5d7d21a728b46dfec269ac8ef55c",
      "tree": "63409d8835ffd4f73513f6986de1fe741d7f5fed",
      "parents": [
        "90f45e4e729a7ffaa3ed2423834aad612870b427"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Wed Jan 16 17:16:37 2013 +0100"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Sat Jan 26 16:34:50 2013 -0800"
      },
      "message": "context_tracking: Add comments on interface and internals\n\nThis subsystem lacks many explanations on its purpose and\ndesign. Add these missing comments.\n\nv4: Document function parameter to be more kernel-doc\nfriendly, as per Namhyung suggestion.\n\nReported-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Alessio Igor Bogani \u003cabogani@kernel.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Chris Metcalf \u003ccmetcalf@tilera.com\u003e\nCc: Christoph Lameter \u003ccl@linux.com\u003e\nCc: Geoff Levand \u003cgeoff@infradead.org\u003e\nCc: Gilad Ben Yossef \u003cgilad@benyossef.com\u003e\nCc: Hakan Akkan \u003chakanakkan@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: Li Zhong \u003czhong@linux.vnet.ibm.com\u003e\nCc: Namhyung Kim \u003cnamhyung.kim@lge.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n"
    },
    {
      "commit": "95a79fd458b85132c25e351d45037ec9643312b2",
      "tree": "7672a00be174e93e9a6ce85e610ba54d8450c3fb",
      "parents": [
        "7d1f9aeff1ee4a20b1aeb377dd0f579fe9647619"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Mon Jan 07 18:12:14 2013 +0100"
      },
      "committer": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sat Jan 26 17:37:17 2013 +0100"
      },
      "message": "context_tracking: Export context state for generic vtime\n\nExport the context state: whether we run in user / kernel\nfrom the context tracking subsystem point of view.\n\nThis is going to be used by the generic virtual cputime\naccounting subsystem that is needed to implement the full\ndynticks.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: Li Zhong \u003czhong@linux.vnet.ibm.com\u003e\nCc: Namhyung Kim \u003cnamhyung.kim@lge.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n"
    },
    {
      "commit": "91d1aa43d30505b0b825db8898ffc80a8eca96c7",
      "tree": "911636f846d800c8a44efd540842dc726ec7c191",
      "parents": [
        "4e79752c25ec221ac1e28f8875b539ed7631a0db"
      ],
      "author": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Tue Nov 27 19:33:25 2012 +0100"
      },
      "committer": {
        "name": "Paul E. McKenney",
        "email": "paulmck@linux.vnet.ibm.com",
        "time": "Fri Nov 30 11:40:07 2012 -0800"
      },
      "message": "context_tracking: New context tracking susbsystem\n\nCreate a new subsystem that probes on kernel boundaries\nto keep track of the transitions between level contexts\nwith two basic initial contexts: user or kernel.\n\nThis is an abstraction of some RCU code that use such tracking\nto implement its userspace extended quiescent state.\n\nWe need to pull this up from RCU into this new level of indirection\nbecause this tracking is also going to be used to implement an \"on\ndemand\" generic virtual cputime accounting. A necessary step to\nshutdown the tick while still accounting the cputime.\n\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: H. Peter Anvin \u003chpa@zytor.com\u003e\nCc: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Li Zhong \u003czhong@linux.vnet.ibm.com\u003e\nCc: Gilad Ben-Yossef \u003cgilad@benyossef.com\u003e\nReviewed-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n[ paulmck: fix whitespace error and email address. ]\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n"
    }
  ]
}