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| author |   Matthew Auld <matthew.auld@intel.com> | 2017-10-06 23:18:15 +0100 |
|---|---|---|
| committer |   Chris Wilson <chris@chris-wilson.co.uk> | 2017-10-07 10:11:43 +0100 |
| commit | b901bb89324ae65573c5f5c0a126cb864096b77c (patch) | |
| tree | 7e1c504a70ea4d15726027f60532e50f0b0fffda /drivers/gpu/drm | |
| parent | drm/i915: introduce simple gemfs (diff) | |
| download | linux-dev-b901bb89324ae65573c5f5c0a126cb864096b77c.tar.xz linux-dev-b901bb89324ae65573c5f5c0a126cb864096b77c.zip | |
drm/i915/gemfs: enable THP
Enable transparent-huge-pages through gemfs by mounting with
huge=within_size.
v2: sprinkle within_size comment
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006145041.21673-4-matthew.auld@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006221833.32439-3-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gemfs.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gemfs.c b/drivers/gpu/drm/i915/i915_gemfs.c index 168d0bd98f60..e2993857df37 100644 --- a/drivers/gpu/drm/i915/i915_gemfs.c +++ b/drivers/gpu/drm/i915/i915_gemfs.c @@ -24,6 +24,7 @@ #include <linux/fs.h> #include <linux/mount.h> +#include <linux/pagemap.h> #include "i915_drv.h" #include "i915_gemfs.h" @@ -41,6 +42,27 @@ int i915_gemfs_init(struct drm_i915_private *i915) if (IS_ERR(gemfs)) return PTR_ERR(gemfs); + /* + * Enable huge-pages for objects that are at least HPAGE_PMD_SIZE, most + * likely 2M. Note that within_size may overallocate huge-pages, if say + * we allocate an object of size 2M + 4K, we may get 2M + 2M, but under + * memory pressure shmem should split any huge-pages which can be + * shrunk. + */ + + if (has_transparent_hugepage()) { + struct super_block *sb = gemfs->mnt_sb; + char options[] = "huge=within_size"; + int flags = 0; + int err; + + err = sb->s_op->remount_fs(sb, &flags, options); + if (err) { + kern_unmount(gemfs); + return err; + } + } + i915->mm.gemfs = gemfs; return 0; |