diff options
| author | Venkatesh Pallipadi <venki@google.com> | 2010-10-04 17:03:18 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-18 20:52:22 +0200 |
| commit | 6cdd5199daf0cb7b0fcc8dca941af08492612887 (patch) | |
| tree | ad9d632d5731a64d0b1ab6410557415480ffcbfd | |
| parent | e1e10a265d28273ab8c70be19d43dcbdeead6c5a (diff) | |
sched: Add a PF flag for ksoftirqd identification
To account softirq time cleanly in scheduler, we need to identify whether
softirq is invoked in ksoftirqd context or softirq at hardirq tail context.
Add PF_KSOFTIRQD for that purpose.
As all PF flag bits are currently taken, create space by moving one of the
infrequently used bits (PF_THREAD_BOUND) down in task_struct to be along
with some other state fields.
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1286237003-12406-4-git-send-email-venki@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/sched.h | 1 | ||||
| -rw-r--r-- | kernel/softirq.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 8744e50cb083..aca0ce675939 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1682,6 +1682,7 @@ extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t * /* * Per process flags */ +#define PF_KSOFTIRQD 0x00000001 /* I am ksoftirqd */ #define PF_STARTING 0x00000002 /* being created */ #define PF_EXITING 0x00000004 /* getting shut down */ #define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */ diff --git a/kernel/softirq.c b/kernel/softirq.c index 988dfbe6bbe8..267f7b763ebb 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -713,6 +713,7 @@ static int run_ksoftirqd(void * __bind_cpu) { set_current_state(TASK_INTERRUPTIBLE); + current->flags |= PF_KSOFTIRQD; while (!kthread_should_stop()) { preempt_disable(); if (!local_softirq_pending()) { |