F18 Xorg/drm/kernel - Failed to find memory space for buffer 0xXXX eviction

Mon Jan 28 11:54:29 UTC 2013

On most of my systems the F17 to F18 upgrade went well.  On the main
one, my desktop, I'm seeing a string of failures that leaves the display
in various states of unusable depending on the positions of the stars
and planets.  The file /var/log/messages contains the following and the
displays have messed up icons and background images.  It looks like the
frame buffer is just displaying random snippets of past items in some
mosaic-ed pattern.

2013-01-27T20:06:10.077567-08:00 arbol kernel: [   28.832592] [TTM] Failed to find memory space for buffer 0xffff88021ceda848 eviction
2013-01-27T20:06:10.077590-08:00 arbol kernel: [   28.832604] [TTM] No space for ffff88021ceda848 (9660 pages, 38640K, 37M)
2013-01-27T20:06:10.077592-08:00 arbol kernel: [   28.832609] [TTM]   placement[0]=0x00070002 (1)
2013-01-27T20:06:10.077593-08:00 arbol kernel: [   28.832613] [TTM]     has_type: 1
2013-01-27T20:06:10.077595-08:00 arbol kernel: [   28.832616] [TTM]     use_type: 1
2013-01-27T20:06:10.077596-08:00 arbol kernel: [   28.832619] [TTM]     flags: 0x0000000A
2013-01-27T20:06:10.077597-08:00 arbol kernel: [   28.832621] [TTM]     gpu_offset: 0x20000000
2013-01-27T20:06:10.077599-08:00 arbol kernel: [   28.832624] [TTM]     size: 131072
2013-01-27T20:06:10.077600-08:00 arbol kernel: [   28.832627] [TTM]     available_caching: 0x00070000
2013-01-27T20:06:10.077601-08:00 arbol kernel: [   28.832629] [TTM]     default_caching: 0x00010000

Does this ring a bell with anyone?  Is there something I can turn off
(perhaps in Xorg.conf) to stop this lossage perhaps at some cost in CPU
time or speed?  It feels like it must be some video acceleration hack
gone awry.  Why else would the kernel get involved in this level of xorg
userland drawing to the framebuffer?

I put in a bugzilla for this a dozen days ago, but so far, not even a
peep from anyone.  I figured I'd try for a larger audience.

    https://bugzilla.redhat.com/show_bug.cgi?id=896170

-wolfgang
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