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| author | Thomas Hellstrom <thellstrom@vmware.com> | 2019-09-12 20:38:54 +0200 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2019-10-14 12:49:24 +0200 |
| commit | 941f2f72dbbe0cf8c2d6e0b180a8021a0ec477fa (patch) | |
| tree | 356379d44566c0483b55c9f85e46b9530645e5d9 /drivers/gpu/drm/ttm/ttm_bo.c | |
| parent | 73a88e4ce31055c415f1ddb55e3f08c9393cf4e3 (diff) | |
| download | lwn-941f2f72dbbe0cf8c2d6e0b180a8021a0ec477fa.tar.gz lwn-941f2f72dbbe0cf8c2d6e0b180a8021a0ec477fa.zip | |
drm/ttm: Restore ttm prefaulting
Commit 4daa4fba3a38 ("gpu: drm: ttm: Adding new return type vm_fault_t")
broke TTM prefaulting. Since vmf_insert_mixed() typically always returns
VM_FAULT_NOPAGE, prefaulting stops after the second PTE.
Restore (almost) the original behaviour. Unfortunately we can no longer
with the new vm_fault_t return type determine whether a prefaulting
PTE insertion hit an already populated PTE, and terminate the insertion
loop. Instead we continue with the pre-determined number of prefaults.
Fixes: 4daa4fba3a38 ("gpu: drm: ttm: Adding new return type vm_fault_t")
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/330387/
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_bo.c')
0 files changed, 0 insertions, 0 deletions