kernel/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c, branch linux-4.17.y

drm/ttm: Use GFP_TRANSHUGE_LIGHT for allocating huge pages

2018-05-09T20:16:30Z

GFP_TRANSHUGE tries very hard to allocate huge pages, which can result in long delays with high memory pressure. I have observed firefox freezing for up to around a minute due to this while restic was taking a full system backup. Since we don't really need huge pages, use GFP_TRANSHUGE_LIGHT | __GFP_NORETRY instead, in order to fail quickly when there are no huge pages available. Set __GFP_KSWAPD_RECLAIM as well, in order for huge pages to be freed up in the background if necessary. With these changes, I'm no longer seeing freezes during a restic backup. Cc: stable@vger.kernel.org Reviewed-by: Christian König Signed-off-by: Michel Dänzer Signed-off-by: Alex Deucher

drm/ttm: check if free mem space is under the lower limit

2018-02-27T04:09:46Z

the free mem space and the lower limit both include two parts: system memory and swap space. For the OOM triggered by TTM, that is the case as below: first swap space is full of swapped out pages and soon system memory also is filled up with ttm pages. and then any memory allocation request will run into OOM. to cover two cases: a. if no swap disk at all or free swap space is under swap mem limit but available system mem is bigger than sys mem limit, allow TTM allocation; b. if the available system mem is less than sys mem limit but free swap space is bigger than swap mem limit, allow TTM allocation. v2: merge two memory limit(swap and system) into one v3: keep original behavior except ttm_opt_ctx->flags with TTM_OPT_FLAG_FORCE_ALLOC v4: always set force_alloc as tx->flags & TTM_OPT_FLAG_FORCE_ALLOC v5: add an attribute for lower_mem_limit v6: set lower_mem_limit as 0 to keep original behavior Signed-off-by: Roger He Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/ttm: drop ttm->glob

2018-02-27T04:09:45Z

The pointer is available as ttm->bdev->glob as well. Signed-off-by: Christian König Reviewed-by: Michel Dänzer Signed-off-by: Alex Deucher

drm/ttm: Simplify ttm_dma_page_put()

2018-02-19T19:19:02Z

Remove redundant store of return code. Signed-off-by: Tom St Denis Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/ttm: Fix coding style in ttm_dma_pool_alloc_new_pages()

2018-02-19T19:19:01Z

Add missing {} braces. Signed-off-by: Tom St Denis Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/ttm: Simplify ttm_dma_find_pool() (v2)

2018-02-19T19:18:58Z

Flip the logic of the comparison and remove the redudant variable for the pool address. (v2): Remove {} bracing. Signed-off-by: Tom St Denis Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/ttm: Fix coding style in ttm_pool_store()

2018-02-19T19:18:58Z

Correct missing {} style. Signed-off-by: Tom St Denis Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/ttm: Allow page allocations w/o triggering OOM..

2018-02-19T19:17:58Z

This to allow drivers to choose to avoid OOM invocation and handle page allocation failures instead. v2: Remove extra new lines. Signed-off-by: Andrey Grodzovsky Reviewed-by: Christian König Reviewed-by: Roger He Signed-off-by: Alex Deucher

drm/ttm: add VADDR_FLAG_UPDATED_COUNT to correctly update dma_page global count

2018-01-18T21:07:26Z

add this for correctly updating global mem count in ttm_mem_zone. before that when ttm_mem_global_alloc_page fails, we would update all dma_page's global mem count in ttm_dma->pages_list. but actually here we should not update for the last dma_page. v2: only the update of last dma_page is not right v3: use lower bits of dma_page vaddr Signed-off-by: Roger He Reviewed-by: Christian König Signed-off-by: Alex Deucher

drm/ttm: check the return value of register_shrinker

2018-01-16T20:35:26Z

This fixes the build warning: "ignoring return value of 'register_shrinker', declared with attribute warn_unused_result [-Wunused-result]" Signed-off-by: Roger He Reviewed-by: Christian König Signed-off-by: Alex Deucher