On Tue, Jun 12, 2012 at 8:50 AM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
> 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@xxxxxxxxxx>
>> Cc: Jerome Glisse <jglisse@xxxxxxxxxx>
>> Cc: stable@xxxxxxxxxxxxxxx
>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Reviewed-by: Jerome Glisse <jglisse@xxxxxxxxxx>
>> ---
>> 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);
>> return -EINVAL;
>> }
>> bo->destroy = destroy;
>> @@ -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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