diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-08-07 11:01:30 +0100 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-08-09 11:24:34 -0700 |
| commit | ae9fed6b601821d70928797c56da0e2008ef840d (patch) | |
| tree | 36342293eab3bb747e52a5d1ac4157b963400afb | |
| parent | 20a0945951705246278f43641bb13611c030e112 (diff) | |
| download | kernel_samsung_smdk4412-ae9fed6b601821d70928797c56da0e2008ef840d.tar.gz kernel_samsung_smdk4412-ae9fed6b601821d70928797c56da0e2008ef840d.tar.bz2 kernel_samsung_smdk4412-ae9fed6b601821d70928797c56da0e2008ef840d.zip | |
drm/i915: Truncate the shmem backing pages on purge
shmfs doesn't actually implement i_ops->truncate() so we were not
immedatiately releasing the backing pages when shrinking the gfx cache
under OOM. Instead use a combination of truncate_inode_pages() and
i_ops->truncate_range() as is used by shmem_delete_inode().
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 8f3e0c10c08..41306217bd7 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1505,9 +1505,16 @@ i915_gem_object_truncate(struct drm_gem_object *obj) struct drm_i915_gem_object *obj_priv = to_intel_bo(obj); struct inode *inode; + /* Our goal here is to return as much of the memory as + * is possible back to the system as we are called from OOM. + * To do this we must instruct the shmfs to drop all of its + * backing pages, *now*. Here we mirror the actions taken + * when by shmem_delete_inode() to release the backing store. + */ inode = obj->filp->f_path.dentry->d_inode; - if (inode->i_op->truncate) - inode->i_op->truncate (inode); + truncate_inode_pages(inode->i_mapping, 0); + if (inode->i_op->truncate_range) + inode->i_op->truncate_range(inode, 0, (loff_t)-1); obj_priv->madv = __I915_MADV_PURGED; } |