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sna: Allow the throttling to be woken by SIGINT 

Rather than completely starve X from handling input events and raising
the spectre of miEQ overflow, stop throttling upon SIGINT. We will have
waited a small period of time (~100ms) for the GPU to catch up, and will
do so again in the near future. This also preserves the hang detection.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2013-06-12 08:34:48 +01:00
parent 15b92c9875
commit dc8f2def54
1 changed files with 5 additions and 1 deletions
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6
src/sna/kgem.c
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@ -757,7 +757,11 @@ static bool test_has_semaphores_enabled(struct kgem *kgem)
static bool __kgem_throttle(struct kgem *kgem)
{
if (drmIoctl(kgem->fd, DRM_IOCTL_I915_GEM_THROTTLE, NULL) == 0)
/* Let this be woken up by sigtimer so that we don't block here
* too much and completely starve X. We will sleep again shortly,
* and so catch up or detect the hang.
*/
if (ioctl(kgem->fd, DRM_IOCTL_I915_GEM_THROTTLE) == 0)
return false;
return errno == EIO;