On Tue, Jun 12, 2012 at 01:28:42PM +0200, Thomas Hellstrom wrote:
A regression was introduced in the 3.3 rc series, commit "drm/ttm: simplify memory accounting for ttm user v2", causing the metadata of buffer objects created using the ttm_bo_create() function to be accounted twice. That causes massive leaks with the vmwgfx driver running for example SpecViewperf Catia-03 test 2, eventually killing the app.
Furthermore, the same commit introduces a regression where metadata accounting is leaked if a buffer object is initialized with an illegal size. This is also fixed with this commit.
v2: Fixed an error path and removed an unused variable.
Signed-off-by: Thomas Hellstrom thellstrom@vmware.com Cc: Jerome Glisse jglisse@redhat.com Cc: stable@vger.kernel.org
Reviewed-by: Konrad Rzeszutek Wilk konrad.wilk@oracle.com
drivers/gpu/drm/ttm/ttm_bo.c | 13 +++---------- 1 files changed, 3 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index b67cfca..36f4b28 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -1204,6 +1204,7 @@ int ttm_bo_init(struct ttm_bo_device *bdev, (*destroy)(bo); else kfree(bo);
ttm_mem_global_free(mem_glob, acc_size);@@ -1307,22 +1308,14 @@ int ttm_bo_create(struct ttm_bo_device *bdev, struct ttm_buffer_object **p_bo) { struct ttm_buffer_object *bo;
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; size_t acc_size; int ret;
acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object));
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
if (unlikely(ret != 0))
return ret;bo = kzalloc(sizeof(*bo), GFP_KERNEL);
if (unlikely(bo == NULL)) {
ttm_mem_global_free(mem_glob, acc_size);
- if (unlikely(bo == NULL)) return -ENOMEM;
- }
- acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object)); ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, buffer_start, interruptible, persistent_swap_storage, acc_size, NULL, NULL);
-- 1.7.7.5
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