Messages in this thread Patch in this message | | | From | Chris Wilson <> | Subject | [PATCH] drm/i915: Selectively enable self-reclaim | Date | Wed, 27 Jan 2010 11:14:04 +0000 |
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Having missed the ENOMEM return via i915_gem_fault(), there are probably other paths that I also missed. By not enabling NORETRY by default these paths can run the shrinker and take memory from the system (but not from our own inactive lists because our shrinker can not run whilst we hold the struct mutex) and this may allow the system to survive a little longer whilst our drivers consume all available memory.
References: OOM killer unexpectedly called with kernel 2.6.32 http://bugzilla.kernel.org/show_bug.cgi?id=14933
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Eric Anholt <eric@anholt.net> Cc: stable@kernel.org --- drivers/gpu/drm/drm_gem.c | 13 ------------- drivers/gpu/drm/i915/i915_gem.c | 22 ++++++++++------------ 2 files changed, 10 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index e9dbb48..8bf3770 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -142,19 +142,6 @@ drm_gem_object_alloc(struct drm_device *dev, size_t size) if (IS_ERR(obj->filp)) goto free; - /* Basically we want to disable the OOM killer and handle ENOMEM - * ourselves by sacrificing pages from cached buffers. - * XXX shmem_file_[gs]et_gfp_mask() - */ - mapping_set_gfp_mask(obj->filp->f_path.dentry->d_inode->i_mapping, - GFP_HIGHUSER | - __GFP_COLD | - __GFP_FS | - __GFP_RECLAIMABLE | - __GFP_NORETRY | - __GFP_NOWARN | - __GFP_NOMEMALLOC); - kref_init(&obj->refcount); kref_init(&obj->handlecount); obj->size = size; diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 28b8f03..1ef5b54 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -336,25 +336,25 @@ i915_gem_object_set_page_gfp_mask (struct drm_gem_object *obj, gfp_t gfp) static int i915_gem_object_get_pages_or_evict(struct drm_gem_object *obj) { + gfp_t gfp; int ret; + gfp = i915_gem_object_get_page_gfp_mask(obj); + i915_gem_object_set_page_gfp_mask(obj, gfp | __GFP_NORETRY | __GFP_NOWARN); ret = i915_gem_object_get_pages(obj); + i915_gem_object_set_page_gfp_mask (obj, gfp); /* If we've insufficient memory to map in the pages, attempt * to make some space by throwing out some old buffers. */ if (ret == -ENOMEM) { struct drm_device *dev = obj->dev; - gfp_t gfp; ret = i915_gem_evict_something(dev, obj->size); if (ret) return ret; - gfp = i915_gem_object_get_page_gfp_mask(obj); - i915_gem_object_set_page_gfp_mask(obj, gfp & ~__GFP_NORETRY); ret = i915_gem_object_get_pages(obj); - i915_gem_object_set_page_gfp_mask (obj, gfp); } return ret; @@ -2580,6 +2580,7 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment) struct drm_i915_gem_object *obj_priv = obj->driver_private; struct drm_mm_node *free_space; bool retry_alloc = false; + gfp_t gfp; int ret; if (obj_priv->madv != I915_MADV_WILLNEED) { @@ -2623,15 +2624,12 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment) DRM_INFO("Binding object of size %zd at 0x%08x\n", obj->size, obj_priv->gtt_offset); #endif - if (retry_alloc) { - i915_gem_object_set_page_gfp_mask (obj, - i915_gem_object_get_page_gfp_mask (obj) & ~__GFP_NORETRY); - } + gfp = i915_gem_object_get_page_gfp_mask(obj); + if (! retry_alloc) + i915_gem_object_set_page_gfp_mask (obj, gfp | __GFP_NORETRY | __GFP_NOWARN); ret = i915_gem_object_get_pages(obj); - if (retry_alloc) { - i915_gem_object_set_page_gfp_mask (obj, - i915_gem_object_get_page_gfp_mask (obj) | __GFP_NORETRY); - } + i915_gem_object_set_page_gfp_mask (obj, gfp); + if (ret) { drm_mm_put_block(obj_priv->gtt_space); obj_priv->gtt_space = NULL; -- 1.6.6
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