Commit 753bdbd0 authored Oct 24, 2017 by Chris Wilson

drm/i915: Call cond_resched() before repeating i915_gem_evict_something()

Insert a breakpoint, a chance to escape back to the scheduler and run
something else for a bit, if we find that the GGTT is full and needs to
be idled in order to make some room. In practice, this should only be an
issue in stress tests as the wait itself will normally give the chance
for the scheduler to intervene and make progress.

References: https://bugs.freedesktop.org/show_bug.cgi?id=103438

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171024205053.7845-1-chris@chris-wilson.co.uk

Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

parent cfddadc9

drivers/gpu/drm/i915/i915_gem_evict.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -216,6 +216,7 @@ i915_gem_evict_something(struct i915_address_space *vm,
	if (ret)		if (ret)
	return ret;		return ret;

			cond_resched();
	goto search_again;		goto search_again;
	}		}