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| author |   Peter Zijlstra <peterz@infradead.org> | 2014-11-26 08:44:03 +0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-02-04 07:52:26 +0100 |
| commit | 1019a359d3dc4b64d0e1e5a5efcb725d5e83994d (patch) | |
| tree | e3ea8601967f078e09dc436670cf8dfcd903311d /kernel/sched/core.c | |
| parent | sched/deadline: Fix hrtick for a non-leftmost task (diff) | |
| download | linux-dev-1019a359d3dc4b64d0e1e5a5efcb725d5e83994d.tar.xz linux-dev-1019a359d3dc4b64d0e1e5a5efcb725d5e83994d.zip | |
sched/deadline: Fix stale yield state
When we fail to start the deadline timer in update_curr_dl(), we
forget to clear ->dl_yielded, resulting in wrecked time keeping.
Since the natural place to clear both ->dl_yielded and ->dl_throttled
is in replenish_dl_entity(); both are after all waiting for that event;
make it so.
Luckily since 67dfa1b756f2 ("sched/deadline: Implement
cancel_dl_timer() to use in switched_from_dl()") the
task_on_rq_queued() condition in dl_task_timer() must be true, and can
therefore call enqueue_task_dl() unconditionally.
Reported-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Kirill Tkhai <ktkhai@parallels.com>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1416962647-76792-4-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions