drm/i915: Remove (struct_mutex) locking for busy-ioctl

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By applying the same logic as for wait-ioctl, we can query whether a
request has completed without holding struct_mutex. The biggest impact
system-wide is removing the flush_active and the contention that causes.

Testcase: igt/gem_busy
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Akash Goel <akash.goel@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470388464-28458-13-git-send-email-chris@chris-wilson.co.uk

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Chris Wilson 2016-08-05 10:14:18 +01:00

parent 033d549b81

commit 3fdc13c7a3

1 changed files with 101 additions and 30 deletions

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drivers/gpu/drm/i915/i915_gem.c

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