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| author | Paul Turner <pjt@google.com> | 2009-07-10 17:05:16 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-07-11 10:00:09 +0200 |
| commit | d07387b490b1c43bfcb9f3900faf96f2dafb2630 (patch) | |
| tree | 97893ceda1e7262df981e87374f2553a6a8dba34 | |
| parent | c20b08e3986c2dbfa6df1e880bf4f7159994d199 (diff) | |
| download | linux-d07387b490b1c43bfcb9f3900faf96f2dafb2630.tar.gz linux-d07387b490b1c43bfcb9f3900faf96f2dafb2630.tar.bz2 linux-d07387b490b1c43bfcb9f3900faf96f2dafb2630.zip | |
sched: Fix bug in SCHED_IDLE interaction with group scheduling
One of the isolation modifications for SCHED_IDLE is the
unitization of sleeper credit. However the check for this
assumes that the sched_entity we're placing always belongs to a
task.
This is potentially not true with group scheduling and leaves
us rummaging randomly when we try to pull the policy.
Signed-off-by: Paul Turner <pjt@google.com>
Cc: peterz@infradead.org
LKML-Reference: <alpine.DEB.1.00.0907101649570.29914@kitami.corp.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/sched_fair.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index ba7fd6e9556f..7c248dc30f41 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -687,7 +687,8 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) * all of which have the same weight. */ if (sched_feat(NORMALIZED_SLEEPER) && - task_of(se)->policy != SCHED_IDLE) + (!entity_is_task(se) || + task_of(se)->policy != SCHED_IDLE)) thresh = calc_delta_fair(thresh, se); vruntime -= thresh; |