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| author | Matthew Brost <matthew.brost@intel.com> | 2023-03-20 23:58:36 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2023-12-20 02:30:21 +0300 |
| commit | b4eecedc75c1b75eee359c806fc964f70e0fc983 (patch) | |
| tree | 6ee2593d7f1a6dfc16f6b27f07159e6029bf11bd | |
| parent | 59ea53eecb7154a2ac8aa39f21f16a144be3eecc (diff) | |
| download | linux-b4eecedc75c1b75eee359c806fc964f70e0fc983.tar.xz | |
drm/xe: Fix potential deadlock handling page faults
Within a class the GuC will hault scheduling if the head of the queue
can't be scheduled the queue will block. This can lead to deadlock if
BCS0-7 all have faults and another engine on BCS0-7 is at head of the
GuC scheduling queue as the migration engine used to fix tthe fault will
be blocked. To work around this set the migration engine to the highest
priority when servicing page faults.
v2 (Maarten): Set priority to kernel once at creation
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Brian Welty <brian.welty@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
| -rw-r--r-- | drivers/gpu/drm/xe/xe_migrate.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_migrate.c b/drivers/gpu/drm/xe/xe_migrate.c index 9102fa1d8759..b9b2a64447d8 100644 --- a/drivers/gpu/drm/xe/xe_migrate.c +++ b/drivers/gpu/drm/xe/xe_migrate.c @@ -360,6 +360,8 @@ struct xe_migrate *xe_migrate_init(struct xe_gt *gt) xe_vm_close_and_put(vm); return ERR_CAST(m->eng); } + if (xe->info.supports_usm) + m->eng->priority = XE_ENGINE_PRIORITY_KERNEL; mutex_init(&m->job_mutex); |