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| author | Peter Zijlstra | 2013-12-19 11:54:45 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2014-01-13 13:47:25 +0100 |
| commit | de212f18e92c952533d57c5510d2790199c75734 (patch) | |
| tree | 0eb0755691e582abcc7aa104f68a58527d638c92 /arch | |
| parent | sched/deadline: Remove the sysctl_sched_dl knobs (diff) | |
| download | kernel-qcow2-linux-de212f18e92c952533d57c5510d2790199c75734.tar.gz kernel-qcow2-linux-de212f18e92c952533d57c5510d2790199c75734.tar.xz kernel-qcow2-linux-de212f18e92c952533d57c5510d2790199c75734.zip | |
sched/deadline: Fix hotplug admission control
The current hotplug admission control is broken because:
CPU_DYING -> migration_call() -> migrate_tasks() -> __migrate_task()
cannot fail and hard assumes it _will_ move all tasks off of the dying
cpu, failing this will break hotplug.
The much simpler solution is a DOWN_PREPARE handler that fails when
removing one CPU gets us below the total allocated bandwidth.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20131220171343.GL2480@laptop.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions