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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-11 14:01:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-11 14:01:07 -0700 |
| commit | 8a1ca8cedd108c8e76a6ab34079d0bbb4f244799 (patch) | |
| tree | 636c715524f1718599209cc289908ea44b6cb859 /kernel/exit.c | |
| parent | b640f042faa2a2fad6464f259a8afec06e2f6386 (diff) | |
| parent | 940010c5a314a7bd9b498593bc6ba1718ac5aec5 (diff) | |
| download | lwn-8a1ca8cedd108c8e76a6ab34079d0bbb4f244799.tar.gz lwn-8a1ca8cedd108c8e76a6ab34079d0bbb4f244799.zip | |
Merge branch 'perfcounters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perfcounters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (574 commits)
perf_counter: Turn off by default
perf_counter: Add counter->id to the throttle event
perf_counter: Better align code
perf_counter: Rename L2 to LL cache
perf_counter: Standardize event names
perf_counter: Rename enums
perf_counter tools: Clean up u64 usage
perf_counter: Rename perf_counter_limit sysctl
perf_counter: More paranoia settings
perf_counter: powerpc: Implement generalized cache events for POWER processors
perf_counters: powerpc: Add support for POWER7 processors
perf_counter: Accurate period data
perf_counter: Introduce struct for sample data
perf_counter tools: Normalize data using per sample period data
perf_counter: Annotate exit ctx recursion
perf_counter tools: Propagate signals properly
perf_counter tools: Small frequency related fixes
perf_counter: More aggressive frequency adjustment
perf_counter/x86: Fix the model number of Intel Core2 processors
perf_counter, x86: Correct some event and umask values for Intel processors
...
Diffstat (limited to 'kernel/exit.c')
| -rw-r--r-- | kernel/exit.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 51d1fe3fb7ad..b6c90b5ef509 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -48,6 +48,7 @@ #include <linux/tracehook.h> #include <linux/fs_struct.h> #include <linux/init_task.h> +#include <linux/perf_counter.h> #include <trace/events/sched.h> #include <asm/uaccess.h> @@ -154,6 +155,9 @@ static void delayed_put_task_struct(struct rcu_head *rhp) { struct task_struct *tsk = container_of(rhp, struct task_struct, rcu); +#ifdef CONFIG_PERF_COUNTERS + WARN_ON_ONCE(tsk->perf_counter_ctxp); +#endif trace_sched_process_free(tsk); put_task_struct(tsk); } @@ -170,6 +174,7 @@ repeat: atomic_dec(&__task_cred(p)->user->processes); proc_flush_task(p); + write_lock_irq(&tasklist_lock); tracehook_finish_release_task(p); __exit_signal(p); @@ -971,16 +976,19 @@ NORET_TYPE void do_exit(long code) module_put(tsk->binfmt->module); proc_exit_connector(tsk); + + /* + * Flush inherited counters to the parent - before the parent + * gets woken up by child-exit notifications. + */ + perf_counter_exit_task(tsk); + exit_notify(tsk, group_dead); #ifdef CONFIG_NUMA mpol_put(tsk->mempolicy); tsk->mempolicy = NULL; #endif #ifdef CONFIG_FUTEX - /* - * This must happen late, after the PID is not - * hashed anymore: - */ if (unlikely(!list_empty(&tsk->pi_state_list))) exit_pi_state_list(tsk); if (unlikely(current->pi_state_cache)) |