Revision fcf8a1e483490cd249df4e02d5425636c3f43c86 authored by Waiman Long on 12 July 2019, 03:56:38 UTC, committed by Linus Torvalds on 12 July 2019, 18:05:44 UTC
There are concerns about memory leaks from extensive use of memory cgroups as each memory cgroup creates its own set of kmem caches. There is a possiblity that the memcg kmem caches may remain even after the memory cgroups have been offlined. Therefore, it will be useful to show the status of each of memcg kmem caches. This patch introduces a new <debugfs>/memcg_slabinfo file which is somewhat similar to /proc/slabinfo in format, but lists only information about kmem caches that have child memcg kmem caches. Information available in /proc/slabinfo are not repeated in memcg_slabinfo. A portion of a sample output of the file was: # <name> <css_id[:dead]> <active_objs> <num_objs> <active_slabs> <num_slabs> rpc_inode_cache root 13 51 1 1 rpc_inode_cache 48 0 0 0 0 fat_inode_cache root 1 45 1 1 fat_inode_cache 41 2 45 1 1 xfs_inode root 770 816 24 24 xfs_inode 92 22 34 1 1 xfs_inode 88:dead 1 34 1 1 xfs_inode 89:dead 23 34 1 1 xfs_inode 85 4 34 1 1 xfs_inode 84 9 34 1 1 The css id of the memcg is also listed. If a memcg is not online, the tag ":dead" will be attached as shown above. [longman@redhat.com: memcg: add ":deact" tag for reparented kmem caches in memcg_slabinfo] Link: http://lkml.kernel.org/r/20190621173005.31514-1-longman@redhat.com [longman@redhat.com: set the flag in the common code as suggested by Roman] Link: http://lkml.kernel.org/r/20190627184324.5875-1-longman@redhat.com Link: http://lkml.kernel.org/r/20190619171621.26209-1-longman@redhat.com Signed-off-by: Waiman Long <longman@redhat.com> Suggested-by: Shakeel Butt <shakeelb@google.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Acked-by: Roman Gushchin <guro@fb.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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nfs3_fs.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2014 Anna Schumaker.
*
* NFSv3-specific filesystem definitions and declarations
*/
#ifndef __LINUX_FS_NFS_NFS3_FS_H
#define __LINUX_FS_NFS_NFS3_FS_H
/*
* nfs3acl.c
*/
#ifdef CONFIG_NFS_V3_ACL
extern struct posix_acl *nfs3_get_acl(struct inode *inode, int type);
extern int nfs3_set_acl(struct inode *inode, struct posix_acl *acl, int type);
extern int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
struct posix_acl *dfacl);
extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
extern const struct xattr_handler *nfs3_xattr_handlers[];
#else
static inline int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
struct posix_acl *dfacl)
{
return 0;
}
#define nfs3_listxattr NULL
#endif /* CONFIG_NFS_V3_ACL */
/* nfs3client.c */
struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *, rpc_authflavor_t);
/* nfs3super.c */
extern struct nfs_subversion nfs_v3;
#endif /* __LINUX_FS_NFS_NFS3_FS_H */
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