drm_gem_create_mmap_offset / intel_uxa_prepare_access bo problems

[Chris Wilson]

On Thu, 22 Nov 2012 16:29:08 +0100, Knut Petersen <Knut_Petersen at t-online.de> wrote:
> Hi Chris!
> 
> Problem:
> =======
> Slowdown of system, missing icons after 16 days kernel uptime and 12 days Xserver uptime.
> Xorg log: flooded with "(WW) intel(0): intel_uxa_prepare_access: bo map (use gtt? 1, access 1) failed: No space left on device" lines
> dmesg: flooded with "[drm:drm_gem_create_mmap_offset] *ERROR* failed to allocate offset for bo 0" entries
> 
> 
> Hardware
> =======
> AOpen i915GMm-hfs, Pentium-M Dothan
> 
> Software:
> =======
> linux kernel 3.6.6
> full Xorg git master, fetch/build 10 November 2012,
> video-intel: git f5d79b202dd448e61ab6ffce26fe9cbf9051d770
> xserver: git 011f8458805e443ac9130865d2840a929a00cabf
> rest of system openSuSE 12.1
> 
> Any idea?

Well you kernel and drm has all the latest protections, which is good
because it's usually a bo leak of some sort. First stop is to check
xrestop, /sys/kernel/debug/dri/0/i915_gem_objects and
intel-gpu-tools/scripts/who.sh

That will undoubtably reveal a large number of objects being held by the
X server...
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre