From: Haifeng Xu <haifeng.xu@shopee.com>
Date: Sat, 13 Apr 2024 15:56:03 +0000 (+0000)
Subject: slub: Set __GFP_COMP in kmem_cache by default
X-Git-Tag: v6.10-rc1~230^2~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5b15f3fb89fc23b52c3cf33e76a1ada83108b438;p=thirdparty%2Fkernel%2Flinux.git

slub: Set __GFP_COMP in kmem_cache by default

Now the __GFP_COMP is set only if the higher-order is not 0. However,
__GFP_COMP flag can be set unconditionally because compound page can
not be created in the order-0 case. And this can also simplify the code
a bit (no need to check the order is 0 or not).

Signed-off-by: Haifeng Xu <haifeng.xu@shopee.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---

diff --git a/mm/slub.c b/mm/slub.c
index a30bd2157c07a..62a0bb2c3147d 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5089,9 +5089,7 @@ static int calculate_sizes(struct kmem_cache *s)
 	if ((int)order < 0)
 		return 0;
 
-	s->allocflags = 0;
-	if (order)
-		s->allocflags |= __GFP_COMP;
+	s->allocflags = __GFP_COMP;
 
 	if (s->flags & SLAB_CACHE_DMA)
 		s->allocflags |= GFP_DMA;