drm/xe: Handle -EDEADLK case in exec ioctl

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With multiple active VMs, under memory pressure, it is possible that
ttm_bo_validate() run into -EDEADLK in ttm_mem_evict_wait_busy() and
return -ENOMEM.

Until ttm properly handles locking in such scenarios, best thing the
driver can do is unwind the lock and retry.

Update xe_exec_begin to retry validating BOs with a timeout upon
-ENOMEM.

Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Niranjana Vishwanathapura 2023-05-09 05:08:24 +00:00 • committed by Rodrigo Vivi

parent 9ca14f94d2

commit 34f89ac8e6

1 changed files with 24 additions and 3 deletions

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drivers/gpu/drm/xe/xe_exec.c

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