On Mon, Oct 15, 2012 at 5:11 PM, Greg KH <[email protected]> wrote: > On Mon, Oct 15, 2012 at 10:11:22AM +0200, Daniel Vetter wrote: >> Hi Greg&stable-team, >> >> The below patch papers over a graphics corruption issue in 3.5/3.6. The >> regression happened due to pwrite tunings in 3.5, which made cpu relocations >> much more likely. >> >> The issue seems to have disappeared in 3.7-rc1, but it takes a few days to >> test >> a patch, so we haven't figured out what exactly fixed things. Now users are >> taking out their pitchforks already, so instead of wasting more days (maybe >> weeks?) to fully understand the bug before backporting the fix, we've opted >> for >> the below disable patch, which should have minimal impact (at most it undoes >> the >> tuning improvements in 3.5). >> >> Patch is tested by reporters & acked by all relevant ppl, please apply to >> 3.5/3.6 series kernels. > > No, I'd really like to wait until you figure out what is happening in > 3.7-rc1 right now before applying the patch. We have the rule, "it must > be in Linus's tree first" for a very good reason :)
Ok, the verdict is in (thanks a lot Dave for testing all these different patches) and it seems like commit 504c7267a1e84b157cbd7e9c1b805e1bc0c2c846 Author: Chris Wilson <[email protected]> Date: Thu Aug 23 13:12:52 2012 +0100 drm/i915: Use cpu relocations if the object is in the GTT but not mappable from upstream nicely papers over the issues. Please apply to 3.5/3.6 stable series (earlier kernels don't exhibit the problem). Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=852210 Tested-by: Dave Airlie <[email protected]> Thanks, Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
