Stephane Eranian
d010b3326c
perf: Add callback to flush branch_stack on context switch ...
With branch stack sampling, it is possible to filter by priv levels.
In system-wide mode, that means it is possible to capture only user
level branches. The builtin SW LBR filter needs to disassemble code
based on LBR captured addresses. For that, it needs to know the task
the addresses are associated with. Because of context switches, the
content of the branch stack buffer may contain addresses from
different tasks.
We need a callback on context switch to either flush the branch stack
or save it. This patch adds a new callback in struct pmu which is called
during context switches. The callback is called only when necessary.
That is when a system-wide context has, at least, one event which
uses PERF_SAMPLE_BRANCH_STACK. The callback is never called for
per-thread context.
In this version, the Intel x86 code simply flushes (resets) the LBR
on context switches (fills it with zeroes). Those zeroed branches are
then filtered out by the SW filter.
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1328826068-11713-11-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-05 14:55:42 +01:00
module: struct module_ref should contains long fields
2012-01-13 09:32:14 +10:30
perf: Add callback to flush branch_stack on context switch
2012-03-05 14:55:42 +01:00
gcov: disable CONSTRUCTORS for UML
2011-07-26 16:49:45 -07:00
Merge branch 'perf/urgent' into perf/core
2012-03-05 09:20:08 +01:00
PM / Freezer: Thaw only kernel threads if freezing of kernel threads fails
2012-02-04 22:23:05 +01:00
Merge branch 'perf/urgent' into perf/core
2012-03-05 09:20:08 +01:00
Merge branch 'rcu/fixes-for-v3.2' into rcu/urgent
2012-01-16 09:41:18 -08:00
ftrace, perf: Add filter support for function trace event
2012-02-21 11:08:30 -05:00
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-01-08 12:19:57 -08:00
kernel/async: remove redundant declaration.
2012-01-13 09:32:18 +10:30
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit
2012-01-17 16:41:31 -08:00
audit: remove AUDIT_SETUP_CONTEXT as it isn't used
2012-01-17 16:16:57 -05:00
audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()
2011-07-20 14:10:11 -07:00
audit: allow interfield comparison in audit rules
2012-01-17 16:17:01 -05:00
kernel-doc: fix new warnings in auditsc.c
2012-01-23 08:44:53 -08:00
Revert "capabitlies: ns_capable can use the cap helpers rather than lsm call"
2012-01-17 10:19:41 -08:00
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure
2011-10-31 19:30:05 -04:00
kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n
2011-07-25 20:57:15 -07:00
Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2012-01-08 13:10:57 -08:00
cpu_pm: call notifiers during suspend
2011-09-23 12:05:29 +05:30
Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-01-09 12:59:24 -08:00
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
KVM: Steal time implementation
2011-07-14 12:59:14 +03:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
sched: Fix ancient race in do_exit()
2012-01-27 11:55:36 +01:00
extable, core_kernel_data(): Make sure all archs define _sdata
2011-05-20 08:56:56 +02:00
epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree()
2012-02-24 11:42:50 -08:00
freezer: kill unused set_freezable_with_signal()
2011-11-23 09:28:17 -08:00
futex: Fix uninterruptible loop due to gate_area
2011-12-31 11:48:28 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-11-28 08:43:52 -08:00
hung_task: fix false positive during vfork
2012-01-03 16:14:32 -08:00
kernel: fix two implicit header assumptions in irq_work.c
2011-10-31 09:20:12 -04:00
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
static keys: Inline the static_key_enabled() function
2012-02-28 20:01:08 +01:00
sched: Isolate preempt counting in its own config option
2011-06-10 15:15:40 +02:00
kdump: crashk_res init check for /sys/kernel/kexec_crash_size
2012-01-12 20:13:11 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'pm-sleep' into pm-for-linus
2011-12-25 23:42:20 +01:00
kprobes: fix a memory leak in function pre_handler_kretprobe()
2012-02-03 16:16:41 -08:00
kernel: ksysfs.c is implicitly using stat.h
2011-10-31 09:20:13 -04:00
freezer: kill unused set_freezable_with_signal()
2011-11-23 09:28:17 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-06 08:02:58 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
PM: Make sysrq-o be available for CONFIG_PM unset
2012-01-14 00:33:03 +01:00
error: implicit declaration of function 'module_flags_taint'
2012-01-15 16:21:07 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
panic: don't print redundant backtraces on oops
2012-01-12 20:13:11 -08:00
module: make module param bint handle nul value
2012-02-14 11:02:15 +10:30
vfs: fix panic in __d_lookup() with high dentry hashtable counts
2012-02-13 20:45:38 -05:00
sysctl: add the kernel.ns_last_pid control
2012-01-12 20:13:11 -08:00
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
printk/tracing: Add console output tracing
2012-02-13 13:46:05 -05:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security
2012-01-14 18:36:33 -08:00
range: fix bogus misuse of module.h to get printk()
2011-10-31 09:20:11 -04:00
rcu: Deconfuse dynticks entry-exit tracing
2011-12-11 10:31:42 -08:00
rcu: Detect illegal rcu dereference in extended quiescent state
2011-12-11 10:31:30 -08:00
rcu: Augment rcu_batch_end tracing for idle and callback state
2011-12-11 10:32:22 -08:00
rcu: Apply ACCESS_ONCE() to rcu_boost() return value
2011-12-11 10:33:19 -08:00
rcu: Add missing __cpuinit annotation in rcutorture code
2012-01-16 09:44:05 -08:00
rcu: Augment rcu_batch_end tracing for idle and callback state
2011-12-11 10:32:22 -08:00
rcu: Keep invoking callbacks if CPU otherwise idle
2011-12-11 10:32:09 -08:00
rcu: Apply ACCESS_ONCE() to rcu_boost() return value
2011-12-11 10:33:19 -08:00
rcu: Track idleness independent of idle tasks
2011-12-11 10:31:24 -08:00
relay: prevent integer overflow in relay_open()
2012-02-10 09:04:49 +01:00
net: introduce res_counter_charge_nofail() for socket allocations
2012-01-22 15:08:46 -05:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
lockdep, rtmutex, bug: Show taint flags on error
2011-12-06 08:16:49 +01:00
rtmutex-tester: convert sysdev_class to a regular subsystem
2011-12-14 14:54:22 -08:00
Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"
2011-12-11 10:33:18 -08:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
seccomp: audit abnormal end to a process due to seccomp
2012-01-17 16:16:55 -05:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
tracing: send_sigqueue() needs trace_signal_generate() too
2012-01-13 18:49:02 +01:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
tracing/softirq: Move __raise_softirq_irqoff() out of header
2012-02-03 09:48:19 -05:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
c/r: prctl: add PR_SET_MM codes to set up mm_struct entries
2012-01-12 20:13:13 -08:00
Cross Memory Attach
2011-10-31 17:30:44 -07:00
x86: Panic on detection of stack overflow
2011-12-05 11:37:47 +01:00
binary_sysctl(): fix memory leak
2011-12-20 10:25:04 -08:00
xfs: remove subdirectories
2011-08-12 16:21:35 -05:00
Make TASKSTATS require root access
2011-09-19 17:04:37 -07:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'core-debugobjects-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-01-06 07:53:34 -08:00
static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]()
2012-02-24 10:05:59 +01:00
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
lockdep/waitqueues: Add better annotation
2011-12-21 10:07:39 +01:00
watchdog: Fix code/comments mismatches
2012-02-11 15:11:33 +01:00
workqueue: make alloc_workqueue() take printf fmt and args for name
2012-01-10 16:30:54 -08:00
d010b3326c