Re: [PATCH] i915: slab shrinker have to return -1 if it can't shrink any objects

On Fri, 24 Jun 2011 17:03:22 +0900, KOSAKI Motohiro kosaki.motohiro@jp.fujitsu.com wrote:

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".

This doesn't look like the cleanest change possible. I think it would be better if the shrink function could uniformly return an error indication so that we wouldn't need the weird looking conditional return.