> 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
