On Wed, 14 Nov 2012 20:43:31 +0000 Jesse Barnes <jbarnes at virtuousgeek.org> wrote: > SNB graphics devices have a bug that prevent them from accessing certain > memory ranges, namely anything below 1M and in the pages listed in the > table. So reserve those at boot if set detect a SNB gfx device on the > CPU to avoid GPU hangs. > > Stephane Marchesin had a similar patch to the page allocator awhile > back, but rather than reserving pages up front, it leaked them at > allocation time. So if people are seeing seemingly random hangs with SNB, please give this patch a try. These issues aren't easy to hit, and they're frustratingly hard to debug, but with some long runtime maybe it'll give people some confidence. -- Jesse Barnes, Intel Open Source Technology Center
