Limiting the allocation of higher order pages to the closest NUMA node and enabling direct memory reclaim provides not only failsafe against situations when memory becomes too much fragmented and the allocator is not able to satisfy the request from the local node but falls back to remote pages (HUGEPAGE) but also offers performance improvement. Accessing remote pages suffers due to bandwidth limitations and could be avoided if memory becomes defragmented and in most cases without using manual compaction. (/proc/sys/vm/compact_memory) Note: On certain distros such as RHEL, the proactive compaction is disabled. (https://tinyurl.com/4f32f7rs) Cc: Dave Airlie <airlied@xxxxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> Reviewed-by: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@xxxxxxx> --- drivers/gpu/drm/ttm/ttm_pool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c index 6e1fd6985ffc..cc27d5c7afe8 100644 --- a/drivers/gpu/drm/ttm/ttm_pool.c +++ b/drivers/gpu/drm/ttm/ttm_pool.c @@ -91,7 +91,7 @@ static struct page *ttm_pool_alloc_page(struct ttm_pool *pool, gfp_t gfp_flags, */ if (order) gfp_flags |= __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN | - __GFP_KSWAPD_RECLAIM; + __GFP_RECLAIM | __GFP_THISNODE; if (!pool->use_dma_alloc) { p = alloc_pages_node(pool->nid, gfp_flags, order); -- 2.34.1
