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 Olšák 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
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