Default to transparent-huge-pages for shmem backed objects through the SHMEM_HUGE_WITHIN_SIZE huge option. Best effort only. Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxx> Cc: Daniel Vetter <daniel@xxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: linux-mm@xxxxxxxxx --- drivers/gpu/drm/i915/i915_gem.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 6a5e864d7710..e4ee54f0f55f 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4308,6 +4308,16 @@ i915_gem_object_create(struct drm_i915_private *dev_priv, u64 size) mapping = obj->base.filp->f_mapping; mapping_set_gfp_mask(mapping, mask); + /* If configured attempt to use THP through shmemfs. This will + * effectively default to huge-pages for this mapping if it makes sense + * given the object size and HPAGE_PMD_SIZE. This is best effort only. + */ +#ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE + if (has_transparent_hugepage() && + HAS_PAGE_SIZE(dev_priv, HPAGE_PMD_SIZE)) + SHMEM_I(mapping->host)->huge = SHMEM_HUGE_WITHIN_SIZE; +#endif + i915_gem_object_init(obj, &i915_gem_object_ops); obj->base.write_domain = I915_GEM_DOMAIN_CPU; -- 2.9.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
