https://bugs.freedesktop.org/show_bug.cgi?id=97128
Bug ID: 97128
Summary: Kernel hang when running out of memory
Product: DRI
Version: XOrg git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: DRM/AMDgpu
Assignee: dri-devel at lists.freedesktop.org
Reporter: bas at basnieuwenhuizen.nl
If I allocate too much memory I get a kernel hang using the drm-next-4.8 branch
from Alex Deucher. SSH stops working too.
This has been tests by allocating GTT buffers in a loop using the winsys for
the new radv vulkan driver. Just as radeonsi, the winsys has a 3 step
allocation process: 1) allocate the buffer 2) Allocate an address range 3) Map
the buffer to address range.
This hang is a regression. Bisection pointed to the following patch as culprit:
commit 089f16c55baacd5e8ae3745625efa82899b4b217
Author: Christian König <christian.koenig at amd.com>
Date: Mon Jun 6 10:17:50 2016 +0200
drm/ttm: cleanup ttm_tt_(unbind|destroy)
ttm_tt_destroy should be the only one unbinding the object.
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Christian König <christian.koenig at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
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