Restore can appear to fail if the svms->evicted counter changes before the function can acquire the necessary locks. Re-read the counter after acquiring the lock to minimize the chances of having to reschedule the worker.
Change-Id: I236b912bddf106583be264abde2f6bd1a5d5a083 Signed-off-by: Felix Kuehling Felix.Kuehling@amd.com --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 0fbc037b06e3..49aca4664411 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -1429,6 +1429,8 @@ static void svm_range_restore_work(struct work_struct *work) svm_range_list_lock_and_flush_work(svms, mm); mutex_lock(&svms->lock);
+ evicted_ranges = atomic_read(&svms->evicted_ranges); + list_for_each_entry(prange, &svms->list, list) { invalid = atomic_read(&prange->invalid); if (!invalid)