[PATCH 7/8] mm/vmscan: take min_slab_pages into account when try to call shrink_node

[Miaohe Lin <linmiaohe@huawei.com>]

Since commit 6b4f7799c6a5 ("mm: vmscan: invoke slab shrinkers from
shrink_zone()"), slab reclaim and lru page reclaim are done together
in the shrink_node. So we should take min_slab_pages into account
when try to call shrink_node.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
 mm/vmscan.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 1145d23332a3..e4ef6f637aa9 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4695,7 +4695,8 @@ static int __node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned in
 	noreclaim_flag = memalloc_noreclaim_save();
 	set_task_reclaim_state(p, &sc.reclaim_state);
 
-	if (node_pagecache_reclaimable(pgdat) > pgdat->min_unmapped_pages) {
+	if (node_pagecache_reclaimable(pgdat) > pgdat->min_unmapped_pages ||
+	    node_page_state_pages(pgdat, NR_SLAB_RECLAIMABLE_B) > pgdat->min_slab_pages) {
 		/*
 		 * Free memory by calling shrink node with increasing
 		 * priorities until we have enough memory freed.
-- 
2.23.0