[052/227] mm: dcache: use kmem_cache_alloc_lru() to allocate dentry

Commit Message

Andrew Morton March 22, 2022, 9:41 p.m. UTC

From: Muchun Song <[e-mail]>
Subject: mm: dcache: use kmem_cache_alloc_lru() to allocate dentry

Like inode cache, the dentry will also be added to its memcg list_lru.  So
replace kmem_cache_alloc() with kmem_cache_alloc_lru() to allocate dentry.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Muchun Song <[e-mail]>
Acked-by: Roman Gushchin <[e-mail]>
Cc: Alex Shi <[e-mail]>
Cc: Anna Schumaker <[e-mail]>
Cc: Chao Yu <[e-mail]>
Cc: Dave Chinner <[e-mail]>
Cc: Fam Zheng <[e-mail]>
Cc: Jaegeuk Kim <[e-mail]>
Cc: Johannes Weiner <[e-mail]>
Cc: Kari Argillander <[e-mail]>
Cc: Matthew Wilcox (Oracle) <[e-mail]>
Cc: Michal Hocko <[e-mail]>
Cc: Qi Zheng <[e-mail]>
Cc: Shakeel Butt <[e-mail]>
Cc: Theodore Ts'o <[e-mail]>
Cc: Trond Myklebust <[e-mail]>
Cc: Vladimir Davydov <[e-mail]>
Cc: Vlastimil Babka <[e-mail]>
Cc: Wei Yang <[e-mail]>
Cc: Xiongchun Duan <[e-mail]>
Cc: Yang Shi <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 fs/dcache.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

--- a/fs/dcache.c~mm-dcache-use-kmem_cache_alloc_lru-to-allocate-dentry
+++ a/fs/dcache.c
@@ -1766,7 +1766,8 @@  static struct dentry *__d_alloc(struct s
 	char *dname;
 	int err;
 
-	dentry = kmem_cache_alloc(dentry_cache, GFP_KERNEL);
+	dentry = kmem_cache_alloc_lru(dentry_cache, &sb->s_dentry_lru,
+				      GFP_KERNEL);
 	if (!dentry)
 		return NULL;