Couldn't reproduce the issue so far. So the attached patch is just a complete shoot into the dark found by rereading the code, but it might actually be the problem.
Please give it a try. Going to keep testing in the meantime, Christian. Am 10.05.2014 10:23, schrieb Christian K?nig: >> I see hangs with kernel 3.15 and SI under memory pressure, e.g. if I >> boot with radeon.vramlimit=256 and then run Xonotic timedemo with >> high settings. I haven't had a chance to bisect it yet, but it might >> be a similar problem. > Sounds like the same issue to me. Thx for the good test case. > >> Any idea what is wrong with it? > Actually I already wondered that it went so smooth without any > regression so far, didn't noticed the bug in bugzilla.kernel.org yet. > >> Some of the tests allocate a lot of MSAA textures and the tests also >> run in parallel, which creates a lot of memory pressure and probably >> causes buffer evictions. > Sounds like the underlying problem to me. We probably evict some part > of a page table without updating the page directory. Going to dig into > it today, it's probably just a one liner missing somewhere in the VM > code. > > Christian. > > Am 09.05.2014 23:39, schrieb Grigori Goronzy: >> On 09.05.2014 20:03, Marek Ol??k wrote: >>> >>> This commit which first appeared in 3.15-rc1 causes hangs on Bonaire: >>> [...] >>> >>> The simplest way to reproduce the hangs is to run piglit with these >>> parameters: >>> -t texelFetch.fs >>> >>> Some of the tests allocate a lot of MSAA textures and the tests also >>> run in parallel, which creates a lot of memory pressure and probably >>> causes buffer evictions. >>> >> >> I see hangs with kernel 3.15 and SI under memory pressure, e.g. if I >> boot with radeon.vramlimit=256 and then run Xonotic timedemo with >> high settings. I haven't had a chance to bisect it yet, but it might >> be a similar problem. >> >> Grigori > -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-drm-radeon-fix-buffer-placement-under-memory-pressur.patch Type: text/x-diff Size: 1892 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20140510/70511dd3/attachment.patch>
