Re: [PATCH] sched/deadline: do not try to push tasks if pinned task switches to dl
From: Wanpeng Li
Date: Fri Oct 10 2014 - 06:27:14 EST
ä 10/10/14, 6:10 PM, Peter Zijlstra åé:
On Fri, Oct 10, 2014 at 10:43:17AM +0800, Wanpeng Li wrote:
As Kirill mentioned(https://lkml.org/lkml/2013/1/29/118):
| If rq has already had 2 or more pushable tasks and we try to add a
| pinned task then call of push_rt_task will just waste a time.
Just switched pinned task is not able to be pushed. If the rq had had
several dl tasks before they have already been considered as candidates
to be pushed (or pulled). This patch does the same behavior as rt class
which introduced by commit 104479 (sched/rt: Do not try to push tasks
if pinned task switches to RT).
Checkpatch rightly complains:
ERROR: Please use 12 or more chars for the git commit ID like: 'commit 10447917551e ("sched/rt: Do not try to push tasks if pinned task switches to RT")'
#12:
which introduced by commit 104479 (sched/rt: Do not try to push tasks
I also got this warning before send out the patch, however, I check 6
chars is enough for this commit. Anyway, I will send a newer version later.
Regards,
Wanpeng Li
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