linux-kernel - [PATCH] fs: fuse: account fuse_inode slab memory as reclaimable

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Message-Id: <20171102202727.12539-1-hannes@cmpxchg.org>
Date:   Thu,  2 Nov 2017 16:27:27 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Miklos Szeredi <mszeredi@...hat.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: [PATCH] fs: fuse: account fuse_inode slab memory as reclaimable

Fuse inodes are currently included in the unreclaimable slab counts -
SUnreclaim in /proc/meminfo, slab_unreclaimable in /proc/vmstat and
the per-cgroup memory.stat. But they are reclaimable just like other
filesystems' inodes, and /proc/sys/vm/drop_caches frees them easily.

Mark the slab cache reclaimable.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 fs/fuse/inode.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 94a745acaef8..5c0f0d689fb2 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -1273,9 +1273,9 @@ static int __init fuse_fs_init(void)
 	int err;
 
 	fuse_inode_cachep = kmem_cache_create("fuse_inode",
-					      sizeof(struct fuse_inode), 0,
-					      SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
-					      fuse_inode_init_once);
+			sizeof(struct fuse_inode), 0,
+			SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT|SLAB_RECLAIM_ACCOUNT,
+			fuse_inode_init_once);
 	err = -ENOMEM;
 	if (!fuse_inode_cachep)
 		goto out;
-- 
2.15.0