diff options
| author | Chris Wilson <[email protected]> | 2018-11-05 17:06:40 +0000 |
|---|---|---|
| committer | Chris Wilson <[email protected]> | 2018-11-06 13:14:05 +0000 |
| commit | e6db7f4d7c5005258b862a5ed1732756fccb6bfa (patch) | |
| tree | b15956ff7e61fe660c7fdffdc3bc154c241a4b42 | |
| parent | bfe60a0272ddadcdfddac77fcfa1860e97c6943d (diff) | |
drm/i915: Break long iterations for get/put shmemfs pages
As we may have to iterate a few thousand elements to acquire and release
the shmemfs backing storage for a GPU object, we need to break up the
long loop with cond_resched() to retain a modicum of low latency for
other processes.
Testcase: igt/benchmarks/gem_syslatency
Signed-off-by: Chris Wilson <[email protected]>
Cc: Kuo-Hsin Yang <[email protected]>
Cc: Matthew Auld <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Reviewed-by: Joonas Lahtinen <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 93d09282710d..347b3836c809 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2404,6 +2404,7 @@ i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj, mark_page_accessed(page); put_page(page); + cond_resched(); } obj->mm.dirty = false; @@ -2574,6 +2575,7 @@ rebuild_st: gfp_t gfp = noreclaim; do { + cond_resched(); page = shmem_read_mapping_page_gfp(mapping, i, gfp); if (likely(!IS_ERR(page))) break; @@ -2584,7 +2586,6 @@ rebuild_st: } i915_gem_shrink(dev_priv, 2 * page_count, NULL, *s++); - cond_resched(); /* * We've tried hard to allocate the memory by reaping |