diff options
| author |   Sanjay Yadav <sanjay.kumar.yadav@intel.com> | 2026-01-08 17:02:30 +0530 |
|---|---|---|
| committer |   Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com> | 2026-01-21 11:06:05 +0530 |
| commit | dc0e3aa54eaa4fc6efa1cf4467a487ea52b94f01 (patch) | |
| tree | bf27a623ad6621594d60fcc8e91742fd3ba75d90 /samples/kobject/ssh:/git@git.zx2c4.com/git: | |
| parent | drm/buddy: Prevent BUG_ON by validating rounded allocation (diff) | |
drm/tests/drm_buddy: Add tests for allocations exceeding max_order
Add kunit tests that exercise edge cases where allocation requests
exceed mm->max_order after rounding. This can happen with
non-power-of-two VRAM sizes when the allocator rounds up requests.
For example, with 10G VRAM (8G + 2G roots), mm->max_order represents
the 8G block. A 9G allocation can round up to 16G in multiple ways:
CONTIGUOUS allocation rounds to next power-of-two, or non-CONTIGUOUS
with 8G min_block_size rounds to next alignment boundary.
The test validates CONTIGUOUS and RANGE flag combinations, ensuring that
only CONTIGUOUS-alone allocations use try_harder fallback, while other
combinations return -EINVAL when rounded size exceeds memory, preventing
BUG_ON assertions.
Cc: Christian König <christian.koenig@amd.com>
Cc: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Suggested-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Sanjay Yadav <sanjay.kumar.yadav@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Link: https://patch.msgid.link/20260108113227.2101872-6-sanjay.kumar.yadav@intel.com
Diffstat (limited to 'samples/kobject/ssh:/git@git.zx2c4.com/git:')
0 files changed, 0 insertions, 0 deletions