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Date: Fri, 24 Jun 2011 17:03:22 +0900 From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> To: linux-kernel@...r.kernel.org, keithp@...thp.com, airlied@...ux.ie, dri-devel@...ts.freedesktop.org CC: kosaki.motohiro@...fujitsu.com Subject: [PATCH] i915: slab shrinker have to return -1 if it can't shrink any objects Now, i915_gem_inactive_shrink() should return -1 instead of 0 if it can't take a lock. Otherwise, vmscan is getting a lot of confusing because vmscan can't distinguish "can't take a lock temporary" and "we've shrank all of i915 objects". Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> Cc: Keith Packard <keithp@...thp.com> Cc: David Airlie <airlied@...ux.ie> Cc: dri-devel@...ts.freedesktop.org --- I've found this issue by reviewing. I hope i915 developers confirm this. Thx. drivers/gpu/drm/i915/i915_gem.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 94c84d7..2f9a9b2 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4104,7 +4104,7 @@ i915_gem_inactive_shrink(struct shrinker *shrinker, struct shrink_control *sc) int cnt; if (!mutex_trylock(&dev->struct_mutex)) - return 0; + return nr_to_scan ? -1 : 0; /* "fast-path" to count number of available objects */ if (nr_to_scan == 0) { -- 1.7.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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