diff options
| author | Sumitra Sharma <sumitraartsy@gmail.com> | 2023-06-17 11:04:20 -0700 |
|---|---|---|
| committer | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2023-06-26 09:12:52 +0100 |
| commit | 36dd2a6e5003a215a1d45e41589164dabae0ec5a (patch) | |
| tree | 4fb1f9327a156d65f36cda83ba9301c97b1babe2 /drivers/gpu/drm/i915 | |
| parent | 6580176fd04331130d94de3022c5eab97dee577e (diff) | |
drm/i915: Replace kmap() with kmap_local_page()
kmap() has been deprecated in favor of the kmap_local_page()
due to high cost, restricted mapping space, the overhead of a
global lock for synchronization, and making the process sleep
in the absence of free slots.
kmap_local_page() is faster than kmap() and offers thread-local
and CPU-local mappings, can take pagefaults in a local kmap region
and preserves preemption by saving the mappings of outgoing tasks
and restoring those of the incoming one during a context switch.
The mapping is kept thread local in the function
“i915_vma_coredump_create” in i915_gpu_error.c
Therefore, replace kmap() with kmap_local_page().
Suggested-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Sumitra Sharma <sumitraartsy@gmail.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230617180420.GA410966@sumitra.com
[tursulin: Removed blank line within tags. Fixup commit text.]
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gpu_error.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index ec368e700235..4749f99e6320 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1173,9 +1173,9 @@ i915_vma_coredump_create(const struct intel_gt *gt, drm_clflush_pages(&page, 1); - s = kmap(page); + s = kmap_local_page(page); ret = compress_page(compress, s, dst, false); - kunmap(page); + kunmap_local(s); drm_clflush_pages(&page, 1); |