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sched/fair: Cleanup pick_task_fair() vs throttle

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Per 54d27365ca ("sched/fair: Prevent throttling in early
pick_next_task_fair()") the reason check_cfs_rq_runtime() is under the
'if (curr)' check is to ensure the (downward) traversal does not
result in an empty cfs_rq.

But then the pick_task_fair() 'copy' of all this made it restart the
traversal anyway, so that seems to solve the issue too.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ben Segall <bsegall@google.com>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Tested-by: Valentin Schneider <vschneid@redhat.com>
Link: https://lkml.kernel.org/r/20240727105028.501679876@infradead.org
This commit is contained in:
Peter Zijlstra 2024-04-03 09:50:07 +02:00
parent 949090eaf0
commit 8e2e13ac61
1 changed files with 3 additions and 3 deletions
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6
kernel/sched/fair.c
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@ -8471,11 +8471,11 @@ again:
update_curr(cfs_rq);
else
curr = NULL;
if (unlikely(check_cfs_rq_runtime(cfs_rq)))
goto again;
}
if (unlikely(check_cfs_rq_runtime(cfs_rq)))
goto again;
se = pick_next_entity(cfs_rq);
cfs_rq = group_cfs_rq(se);
} while (cfs_rq);