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| author |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-03-28 00:03:25 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-03-28 16:41:13 +0100 |
| commit | 1d5bfac96f1e1856fbdb3f06679691e5b9c2ba8f (patch) | |
| tree | e0ab711e8c18a05f5e08021e708ff287e20247b0 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | drm/i915: fold wait_for_atomic_us into wait_for_atomic (diff) | |
| download | linux-dev-1d5bfac96f1e1856fbdb3f06679691e5b9c2ba8f.tar.xz linux-dev-1d5bfac96f1e1856fbdb3f06679691e5b9c2ba8f.zip | |
drm/i915: fix up _wait_for macro
As Thomas Gleixner spotted, it's rather horrible racy:
- We can miss almost a full tick, so need to compensate by 1 jiffy.
- We need to re-check the condition when having timed-out, since a
the last check could have been before the timeout expired. E.g. when
we've been preempted or a long irq happened.
Cc: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Jack Winter <jbh@alchemy.lu>
Cc: Jack Winter <jbh@alchemy.lu>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions