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| author | Chris Wilson <[email protected]> | 2017-08-04 11:41:35 +0100 |
|---|---|---|
| committer | Jani Nikula <[email protected]> | 2017-08-07 13:38:56 +0300 |
| commit | cd82f37a9ddaaafb33d8bc3f44857edbad5d52bf (patch) | |
| tree | fe4ac7530bfd8cde14873c3844aa29f04890e4f0 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | b5fa57ddc4a2492441a1391f07d5c8a282271249 (diff) | |
drm/i915/shrinker: Wrap need_resched() inside preempt-disable
In order for us to successfully detect the end of a timeslice,
preemption must be disabled. Otherwise, inside the loop we may be
preempted many times without our noticing, and each time our timeslice
will be reset, invalidating need_resched()
Reported-by: Joonas Lahtinen <[email protected]>
Reported-by: Tomi Sarvela <[email protected]>
Fixes: 290271de34f6 ("drm/i915: Spin for struct_mutex inside shrinker")
Signed-off-by: Chris Wilson <[email protected]>
Cc: Mika Kuoppala <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Cc: <[email protected]> # v4.13-rc1+
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Tested-by: Joonas Lahtinen <[email protected]>
Reviewed-by: Joonas Lahtinen <[email protected]>
(cherry picked from commit 6cb0c6ad9e07f2c7971c4e8e0d9b7ceba151a925)
Signed-off-by: Jani Nikula <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions