summaryrefslogtreecommitdiffstats
path: root/kernel/sched
diff options
context:
space:
mode:
authorFrederic Weisbecker <fweisbec@gmail.com>2015-11-19 16:47:30 +0100
committerIngo Molnar <mingo@kernel.org>2015-12-04 10:34:44 +0100
commit7098c1eac75dc03fdbb7249171a6e68ce6044a5a (patch)
tree06b4c828297c06b6aaa5494054a5cb9855e2d198 /kernel/sched
parent7877a0ba5ec63c7b0111b06c773f1696fa17b35a (diff)
downloadlinux-7098c1eac75dc03fdbb7249171a6e68ce6044a5a.tar.bz2
sched/cputime: Clarify vtime symbols and document them
VTIME_SLEEPING state happens either when: 1) The task is sleeping and no tickless delta is to be added on the task cputime stats. 2) The CPU isn't running vtime at all, so the same properties of 1) applies. Lets rename the vtime symbol to reflect both states. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christoph Lameter <cl@linux.com> Cc: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1447948054-28668-4-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/cputime.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 1128d4ba6c55..4a18a6ed7723 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -680,7 +680,7 @@ static cputime_t get_vtime_delta(struct task_struct *tsk)
{
unsigned long long delta = vtime_delta(tsk);
- WARN_ON_ONCE(tsk->vtime_snap_whence == VTIME_SLEEPING);
+ WARN_ON_ONCE(tsk->vtime_snap_whence == VTIME_INACTIVE);
tsk->vtime_snap += delta;
/* CHECKME: always safe to convert nsecs to cputime? */
@@ -764,7 +764,7 @@ void vtime_account_idle(struct task_struct *tsk)
void arch_vtime_task_switch(struct task_struct *prev)
{
write_seqlock(&prev->vtime_seqlock);
- prev->vtime_snap_whence = VTIME_SLEEPING;
+ prev->vtime_snap_whence = VTIME_INACTIVE;
write_sequnlock(&prev->vtime_seqlock);
write_seqlock(&current->vtime_seqlock);
@@ -829,7 +829,7 @@ fetch_task_cputime(struct task_struct *t,
*s_dst = *s_src;
/* Task is sleeping, nothing to add */
- if (t->vtime_snap_whence == VTIME_SLEEPING ||
+ if (t->vtime_snap_whence == VTIME_INACTIVE ||
is_idle_task(t))
continue;