[Patch v2] drm/ttm: Allow direct reclaim to allocate local memory

[Rajneesh Bhardwaj]

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 at redhat.com>
Cc: Vlastimil Babka <vbabka at suse.cz>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Reviewed-by: Christian König <christian.koenig at amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj at amd.com>
---
 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