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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-23 19:08:49 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-03-06 12:57:16 +0100 |
| commit | f1dfdab694eb3838ac26f4b73695929c07d92a33 (patch) | |
| tree | 37791cfddf0e1e76792321e96271bf86cbe9c5bf /kernel/sched/pelt.c | |
| parent | 1b10d388d094bb32129060236add6f50b204a69d (diff) | |
| download | linux-stable-f1dfdab694eb3838ac26f4b73695929c07d92a33.tar.gz linux-stable-f1dfdab694eb3838ac26f4b73695929c07d92a33.tar.bz2 linux-stable-f1dfdab694eb3838ac26f4b73695929c07d92a33.zip | |
sched/vtime: Prevent unstable evaluation of WARN(vtime->state)
As the vtime is sampled under loose seqcount protection by kcpustat, the
vtime fields may change as the code flows. Where logic dictates a field
has a static value, use a READ_ONCE.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes: 74722bb223d0 ("sched/vtime: Bring up complete kcpustat accessor")
Link: https://lkml.kernel.org/r/20200123180849.28486-1-frederic@kernel.org
Diffstat (limited to 'kernel/sched/pelt.c')
0 files changed, 0 insertions, 0 deletions