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fs: icache RCU free inodes

RCU free the struct inode. This will allow:

- Subsequent store-free path walking patch. The inode must be consulted for
  permissions when walking, so an RCU inode reference is a must.
- sb_inode_list_lock to be moved inside i_lock because sb list walkers who want
  to take i_lock no longer need to take sb_inode_list_lock to walk the list in
  the first place. This will simplify and optimize locking.
- Could remove some nested trylock loops in dcache code
- Could potentially simplify things a bit in VM land. Do not need to take the
  page lock to follow page->mapping.

The downsides of this is the performance cost of using RCU. In a simple
creat/unlink microbenchmark, performance drops by about 10% due to inability to
reuse cache-hot slab objects. As iterations increase and RCU freeing starts
kicking over, this increases to about 20%.

In cases where inode lifetimes are longer (ie. many inodes may be allocated
during the average life span of a single inode), a lot of this cache reuse is
not applicable, so the regression caused by this patch is smaller.

The cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU,
however this adds some complexity to list walking and store-free path walking,
so I prefer to implement this at a later date, if it is shown to be a win in
real situations. I haven't found a regression in any non-micro benchmark so I
doubt it will be a problem.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
master
Nick Piggin 11 years ago
parent
commit
fa0d7e3de6
  1. 14
      Documentation/filesystems/porting
  2. 10
      arch/powerpc/platforms/cell/spufs/inode.c
  3. 9
      drivers/staging/pohmelfs/inode.c
  4. 9
      drivers/staging/smbfs/inode.c
  5. 9
      fs/9p/vfs_inode.c
  6. 9
      fs/adfs/super.c
  7. 9
      fs/affs/super.c
  8. 10
      fs/afs/super.c
  9. 10
      fs/befs/linuxvfs.c
  10. 9
      fs/bfs/inode.c
  11. 9
      fs/block_dev.c
  12. 9
      fs/btrfs/inode.c
  13. 11
      fs/ceph/inode.c
  14. 9
      fs/cifs/cifsfs.c
  15. 9
      fs/coda/inode.c
  16. 12
      fs/ecryptfs/super.c
  17. 9
      fs/efs/super.c
  18. 9
      fs/exofs/super.c
  19. 9
      fs/ext2/super.c
  20. 9
      fs/ext3/super.c
  21. 9
      fs/ext4/super.c
  22. 9
      fs/fat/inode.c
  23. 9
      fs/freevxfs/vxfs_inode.c
  24. 9
      fs/fuse/inode.c
  25. 9
      fs/gfs2/super.c
  26. 9
      fs/hfs/super.c
  27. 10
      fs/hfsplus/super.c
  28. 9
      fs/hostfs/hostfs_kern.c
  29. 9
      fs/hpfs/super.c
  30. 9
      fs/hppfs/hppfs.c
  31. 9
      fs/hugetlbfs/inode.c
  32. 10
      fs/inode.c
  33. 9
      fs/isofs/inode.c
  34. 9
      fs/jffs2/super.c
  35. 10
      fs/jfs/super.c
  36. 9
      fs/logfs/inode.c
  37. 9
      fs/minix/inode.c
  38. 9
      fs/ncpfs/inode.c
  39. 9
      fs/nfs/inode.c
  40. 10
      fs/nilfs2/super.c
  41. 9
      fs/ntfs/inode.c
  42. 9
      fs/ocfs2/dlmfs/dlmfs.c
  43. 9
      fs/ocfs2/super.c
  44. 9
      fs/openpromfs/inode.c
  45. 9
      fs/proc/inode.c
  46. 9
      fs/qnx4/inode.c
  47. 9
      fs/reiserfs/super.c
  48. 9
      fs/romfs/super.c
  49. 9
      fs/squashfs/super.c
  50. 9
      fs/sysv/inode.c
  51. 10
      fs/ubifs/super.c
  52. 9
      fs/udf/super.c
  53. 9
      fs/ufs/super.c
  54. 13
      fs/xfs/xfs_iget.c
  55. 5
      include/linux/fs.h
  56. 1
      include/linux/net.h
  57. 9
      ipc/mqueue.c
  58. 9
      mm/shmem.c
  59. 16
      net/socket.c
  60. 10
      net/sunrpc/rpc_pipe.c

14
Documentation/filesystems/porting

@ -346,3 +346,17 @@ look at examples of other filesystems) for guidance.
for details of what locks to replace dcache_lock with in order to protect
particular things. Most of the time, a filesystem only needs ->d_lock, which
protects *all* the dcache state of a given dentry.
--
[mandatory]
Filesystems must RCU-free their inodes, if they can have been accessed
via rcu-walk path walk (basically, if the file can have had a path name in the
vfs namespace).
i_dentry and i_rcu share storage in a union, and the vfs expects
i_dentry to be reinitialized before it is freed, so an:
INIT_LIST_HEAD(&inode->i_dentry);
must be done in the RCU callback.

10
arch/powerpc/platforms/cell/spufs/inode.c

@ -71,12 +71,18 @@ spufs_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void
spufs_destroy_inode(struct inode *inode)
static void spufs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(spufs_inode_cache, SPUFS_I(inode));
}
static void spufs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, spufs_i_callback);
}
static void
spufs_init_once(void *p)
{

9
drivers/staging/pohmelfs/inode.c

@ -826,6 +826,13 @@ const struct address_space_operations pohmelfs_aops = {
.set_page_dirty = __set_page_dirty_nobuffers,
};
static void pohmelfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(pohmelfs_inode_cache, POHMELFS_I(inode));
}
/*
* ->detroy_inode() callback. Deletes inode from the caches
* and frees private data.
@ -842,8 +849,8 @@ static void pohmelfs_destroy_inode(struct inode *inode)
dprintk("%s: pi: %p, inode: %p, ino: %llu.\n",
__func__, pi, &pi->vfs_inode, pi->ino);
kmem_cache_free(pohmelfs_inode_cache, pi);
atomic_long_dec(&psb->total_inodes);
call_rcu(&inode->i_rcu, pohmelfs_i_callback);
}
/*

9
drivers/staging/smbfs/inode.c

@ -62,11 +62,18 @@ static struct inode *smb_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void smb_destroy_inode(struct inode *inode)
static void smb_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(smb_inode_cachep, SMB_I(inode));
}
static void smb_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, smb_i_callback);
}
static void init_once(void *foo)
{
struct smb_inode_info *ei = (struct smb_inode_info *) foo;

9
fs/9p/vfs_inode.c

@ -237,10 +237,17 @@ struct inode *v9fs_alloc_inode(struct super_block *sb)
*
*/
void v9fs_destroy_inode(struct inode *inode)
static void v9fs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode));
}
void v9fs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, v9fs_i_callback);
}
#endif
/**

9
fs/adfs/super.c

@ -240,11 +240,18 @@ static struct inode *adfs_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void adfs_destroy_inode(struct inode *inode)
static void adfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
}
static void adfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, adfs_i_callback);
}
static void init_once(void *foo)
{
struct adfs_inode_info *ei = (struct adfs_inode_info *) foo;

9
fs/affs/super.c

@ -95,11 +95,18 @@ static struct inode *affs_alloc_inode(struct super_block *sb)
return &i->vfs_inode;
}
static void affs_destroy_inode(struct inode *inode)
static void affs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
}
static void affs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, affs_i_callback);
}
static void init_once(void *foo)
{
struct affs_inode_info *ei = (struct affs_inode_info *) foo;

10
fs/afs/super.c

@ -498,6 +498,14 @@ static struct inode *afs_alloc_inode(struct super_block *sb)
return &vnode->vfs_inode;
}
static void afs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct afs_vnode *vnode = AFS_FS_I(inode);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(afs_inode_cachep, vnode);
}
/*
* destroy an AFS inode struct
*/
@ -511,7 +519,7 @@ static void afs_destroy_inode(struct inode *inode)
ASSERTCMP(vnode->server, ==, NULL);
kmem_cache_free(afs_inode_cachep, vnode);
call_rcu(&inode->i_rcu, afs_i_callback);
atomic_dec(&afs_count_active_inodes);
}

10
fs/befs/linuxvfs.c

@ -284,12 +284,18 @@ befs_alloc_inode(struct super_block *sb)
return &bi->vfs_inode;
}
static void
befs_destroy_inode(struct inode *inode)
static void befs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
}
static void befs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, befs_i_callback);
}
static void init_once(void *foo)
{
struct befs_inode_info *bi = (struct befs_inode_info *) foo;

9
fs/bfs/inode.c

@ -248,11 +248,18 @@ static struct inode *bfs_alloc_inode(struct super_block *sb)
return &bi->vfs_inode;
}
static void bfs_destroy_inode(struct inode *inode)
static void bfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(bfs_inode_cachep, BFS_I(inode));
}
static void bfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, bfs_i_callback);
}
static void init_once(void *foo)
{
struct bfs_inode_info *bi = foo;

9
fs/block_dev.c

@ -409,13 +409,20 @@ static struct inode *bdev_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void bdev_destroy_inode(struct inode *inode)
static void bdev_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct bdev_inode *bdi = BDEV_I(inode);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(bdev_cachep, bdi);
}
static void bdev_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, bdev_i_callback);
}
static void init_once(void *foo)
{
struct bdev_inode *ei = (struct bdev_inode *) foo;

9
fs/btrfs/inode.c

@ -6495,6 +6495,13 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
return inode;
}
static void btrfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode));
}
void btrfs_destroy_inode(struct inode *inode)
{
struct btrfs_ordered_extent *ordered;
@ -6564,7 +6571,7 @@ void btrfs_destroy_inode(struct inode *inode)
inode_tree_del(inode);
btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
free:
kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode));
call_rcu(&inode->i_rcu, btrfs_i_callback);
}
int btrfs_drop_inode(struct inode *inode)

11
fs/ceph/inode.c

@ -368,6 +368,15 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
return &ci->vfs_inode;
}
static void ceph_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct ceph_inode_info *ci = ceph_inode(inode);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ceph_inode_cachep, ci);
}
void ceph_destroy_inode(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
@ -407,7 +416,7 @@ void ceph_destroy_inode(struct inode *inode)
if (ci->i_xattrs.prealloc_blob)
ceph_buffer_put(ci->i_xattrs.prealloc_blob);
kmem_cache_free(ceph_inode_cachep, ci);
call_rcu(&inode->i_rcu, ceph_i_callback);
}

9
fs/cifs/cifsfs.c

@ -334,10 +334,17 @@ cifs_alloc_inode(struct super_block *sb)
return &cifs_inode->vfs_inode;
}
static void cifs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
}
static void
cifs_destroy_inode(struct inode *inode)
{
kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
call_rcu(&inode->i_rcu, cifs_i_callback);
}
static void

9
fs/coda/inode.c

@ -56,11 +56,18 @@ static struct inode *coda_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void coda_destroy_inode(struct inode *inode)
static void coda_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(coda_inode_cachep, ITOC(inode));
}
static void coda_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, coda_i_callback);
}
static void init_once(void *foo)
{
struct coda_inode_info *ei = (struct coda_inode_info *) foo;

12
fs/ecryptfs/super.c

@ -62,6 +62,16 @@ out:
return inode;
}
static void ecryptfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct ecryptfs_inode_info *inode_info;
inode_info = ecryptfs_inode_to_private(inode);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ecryptfs_inode_info_cache, inode_info);
}
/**
* ecryptfs_destroy_inode
* @inode: The ecryptfs inode
@ -88,7 +98,7 @@ static void ecryptfs_destroy_inode(struct inode *inode)
}
}
ecryptfs_destroy_crypt_stat(&inode_info->crypt_stat);
kmem_cache_free(ecryptfs_inode_info_cache, inode_info);
call_rcu(&inode->i_rcu, ecryptfs_i_callback);
}
/**

9
fs/efs/super.c

@ -65,11 +65,18 @@ static struct inode *efs_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void efs_destroy_inode(struct inode *inode)
static void efs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
}
static void efs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, efs_i_callback);
}
static void init_once(void *foo)
{
struct efs_inode_info *ei = (struct efs_inode_info *) foo;

9
fs/exofs/super.c

@ -150,12 +150,19 @@ static struct inode *exofs_alloc_inode(struct super_block *sb)
return &oi->vfs_inode;
}
static void exofs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(exofs_inode_cachep, exofs_i(inode));
}
/*
* Remove an inode from the cache
*/
static void exofs_destroy_inode(struct inode *inode)
{
kmem_cache_free(exofs_inode_cachep, exofs_i(inode));
call_rcu(&inode->i_rcu, exofs_i_callback);
}
/*

9
fs/ext2/super.c

@ -161,11 +161,18 @@ static struct inode *ext2_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void ext2_destroy_inode(struct inode *inode)
static void ext2_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ext2_inode_cachep, EXT2_I(inode));
}
static void ext2_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, ext2_i_callback);
}
static void init_once(void *foo)
{
struct ext2_inode_info *ei = (struct ext2_inode_info *) foo;

9
fs/ext3/super.c

@ -479,6 +479,13 @@ static struct inode *ext3_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void ext3_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
}
static void ext3_destroy_inode(struct inode *inode)
{
if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
@ -489,7 +496,7 @@ static void ext3_destroy_inode(struct inode *inode)
false);
dump_stack();
}
kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
call_rcu(&inode->i_rcu, ext3_i_callback);
}
static void init_once(void *foo)

9
fs/ext4/super.c

@ -841,6 +841,13 @@ static int ext4_drop_inode(struct inode *inode)
return drop;
}
static void ext4_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
}
static void ext4_destroy_inode(struct inode *inode)
{
ext4_ioend_wait(inode);
@ -853,7 +860,7 @@ static void ext4_destroy_inode(struct inode *inode)
true);
dump_stack();
}
kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
call_rcu(&inode->i_rcu, ext4_i_callback);
}
static void init_once(void *foo)

9
fs/fat/inode.c

@ -514,11 +514,18 @@ static struct inode *fat_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void fat_destroy_inode(struct inode *inode)
static void fat_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(fat_inode_cachep, MSDOS_I(inode));
}
static void fat_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, fat_i_callback);
}
static void init_once(void *foo)
{
struct msdos_inode_info *ei = (struct msdos_inode_info *)foo;

9
fs/freevxfs/vxfs_inode.c

@ -337,6 +337,13 @@ vxfs_iget(struct super_block *sbp, ino_t ino)
return ip;
}
static void vxfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(vxfs_inode_cachep, inode->i_private);
}
/**
* vxfs_evict_inode - remove inode from main memory
* @ip: inode to discard.
@ -350,5 +357,5 @@ vxfs_evict_inode(struct inode *ip)
{
truncate_inode_pages(&ip->i_data, 0);
end_writeback(ip);
kmem_cache_free(vxfs_inode_cachep, ip->i_private);
call_rcu(&ip->i_rcu, vxfs_i_callback);
}

9
fs/fuse/inode.c

@ -99,6 +99,13 @@ static struct inode *fuse_alloc_inode(struct super_block *sb)
return inode;
}
static void fuse_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(fuse_inode_cachep, inode);
}
static void fuse_destroy_inode(struct inode *inode)
{
struct fuse_inode *fi = get_fuse_inode(inode);
@ -106,7 +113,7 @@ static void fuse_destroy_inode(struct inode *inode)
BUG_ON(!list_empty(&fi->queued_writes));
if (fi->forget_req)
fuse_request_free(fi->forget_req);
kmem_cache_free(fuse_inode_cachep, inode);
call_rcu(&inode->i_rcu, fuse_i_callback);
}
void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req,

9
fs/gfs2/super.c

@ -1405,11 +1405,18 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb)
return &ip->i_inode;
}
static void gfs2_destroy_inode(struct inode *inode)
static void gfs2_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(gfs2_inode_cachep, inode);
}
static void gfs2_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, gfs2_i_callback);
}
const struct super_operations gfs2_super_ops = {
.alloc_inode = gfs2_alloc_inode,
.destroy_inode = gfs2_destroy_inode,

9
fs/hfs/super.c

@ -167,11 +167,18 @@ static struct inode *hfs_alloc_inode(struct super_block *sb)
return i ? &i->vfs_inode : NULL;
}
static void hfs_destroy_inode(struct inode *inode)
static void hfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
}
static void hfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, hfs_i_callback);
}
static const struct super_operations hfs_super_operations = {
.alloc_inode = hfs_alloc_inode,
.destroy_inode = hfs_destroy_inode,

10
fs/hfsplus/super.c

@ -488,11 +488,19 @@ static struct inode *hfsplus_alloc_inode(struct super_block *sb)
return i ? &i->vfs_inode : NULL;
}
static void hfsplus_destroy_inode(struct inode *inode)
static void hfsplus_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
}
static void hfsplus_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, hfsplus_i_callback);
}
#define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
static struct dentry *hfsplus_mount(struct file_system_type *fs_type,

9
fs/hostfs/hostfs_kern.c

@ -247,11 +247,18 @@ static void hostfs_evict_inode(struct inode *inode)
}
}
static void hostfs_destroy_inode(struct inode *inode)
static void hostfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kfree(HOSTFS_I(inode));
}
static void hostfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, hostfs_i_callback);
}
static int hostfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
{
const char *root_path = vfs->mnt_sb->s_fs_info;

9
fs/hpfs/super.c

@ -177,11 +177,18 @@ static struct inode *hpfs_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void hpfs_destroy_inode(struct inode *inode)
static void hpfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
}
static void hpfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, hpfs_i_callback);
}
static void init_once(void *foo)
{
struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;

9
fs/hppfs/hppfs.c

@ -632,11 +632,18 @@ void hppfs_evict_inode(struct inode *ino)
mntput(ino->i_sb->s_fs_info);
}
static void hppfs_destroy_inode(struct inode *inode)
static void hppfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kfree(HPPFS_I(inode));
}
static void hppfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, hppfs_i_callback);
}
static const struct super_operations hppfs_sbops = {
.alloc_inode = hppfs_alloc_inode,
.destroy_inode = hppfs_destroy_inode,

9
fs/hugetlbfs/inode.c

@ -663,11 +663,18 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
return &p->vfs_inode;
}
static void hugetlbfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
}
static void hugetlbfs_destroy_inode(struct inode *inode)
{
hugetlbfs_inc_free_inodes(HUGETLBFS_SB(inode->i_sb));
mpol_free_shared_policy(&HUGETLBFS_I(inode)->policy);
kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
call_rcu(&inode->i_rcu, hugetlbfs_i_callback);
}
static const struct address_space_operations hugetlbfs_aops = {

10
fs/inode.c

@ -272,6 +272,13 @@ void __destroy_inode(struct inode *inode)
}
EXPORT_SYMBOL(__destroy_inode);
static void i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(inode_cachep, inode);
}
static void destroy_inode(struct inode *inode)
{
BUG_ON(!list_empty(&inode->i_lru));
@ -279,7 +286,7 @@ static void destroy_inode(struct inode *inode)
if (inode->i_sb->s_op->destroy_inode)
inode->i_sb->s_op->destroy_inode(inode);
else
kmem_cache_free(inode_cachep, (inode));
call_rcu(&inode->i_rcu, i_callback);
}
/*
@ -432,6 +439,7 @@ void end_writeback(struct inode *inode)
BUG_ON(!(inode->i_state & I_FREEING));
BUG_ON(inode->i_state & I_CLEAR);
inode_sync_wait(inode);
/* don't need i_lock here, no concurrent mods to i_state */
inode->i_state = I_FREEING | I_CLEAR;
}
EXPORT_SYMBOL(end_writeback);

9
fs/isofs/inode.c

@ -81,11 +81,18 @@ static struct inode *isofs_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void isofs_destroy_inode(struct inode *inode)
static void isofs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
}
static void isofs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, isofs_i_callback);
}
static void init_once(void *foo)
{
struct iso_inode_info *ei = foo;

9
fs/jffs2/super.c

@ -40,11 +40,18 @@ static struct inode *jffs2_alloc_inode(struct super_block *sb)
return &f->vfs_inode;
}
static void jffs2_destroy_inode(struct inode *inode)
static void jffs2_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode));
}
static void jffs2_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, jffs2_i_callback);
}
static void jffs2_i_init_once(void *foo)
{
struct jffs2_inode_info *f = foo;

10
fs/jfs/super.c

@ -115,6 +115,14 @@ static struct inode *jfs_alloc_inode(struct super_block *sb)
return &jfs_inode->vfs_inode;
}
static void jfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct jfs_inode_info *ji = JFS_IP(inode);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(jfs_inode_cachep, ji);
}
static void jfs_destroy_inode(struct inode *inode)
{
struct jfs_inode_info *ji = JFS_IP(inode);
@ -128,7 +136,7 @@ static void jfs_destroy_inode(struct inode *inode)
ji->active_ag = -1;
}
spin_unlock_irq(&ji->ag_lock);
kmem_cache_free(jfs_inode_cachep, ji);
call_rcu(&inode->i_rcu, jfs_i_callback);
}
static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)

9
fs/logfs/inode.c

@ -141,13 +141,20 @@ struct inode *logfs_safe_iget(struct super_block *sb, ino_t ino, int *is_cached)
return __logfs_iget(sb, ino);
}
static void logfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(logfs_inode_cache, logfs_inode(inode));
}
static void __logfs_destroy_inode(struct inode *inode)
{
struct logfs_inode *li = logfs_inode(inode);
BUG_ON(li->li_block);
list_del(&li->li_freeing_list);
kmem_cache_free(logfs_inode_cache, li);
call_rcu(&inode->i_rcu, logfs_i_callback);
}
static void logfs_destroy_inode(struct inode *inode)

9
fs/minix/inode.c

@ -68,11 +68,18 @@ static struct inode *minix_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void minix_destroy_inode(struct inode *inode)
static void minix_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(minix_inode_cachep, minix_i(inode));
}
static void minix_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, minix_i_callback);
}
static void init_once(void *foo)
{
struct minix_inode_info *ei = (struct minix_inode_info *) foo;

9
fs/ncpfs/inode.c

@ -58,11 +58,18 @@ static struct inode *ncp_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void ncp_destroy_inode(struct inode *inode)
static void ncp_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ncp_inode_cachep, NCP_FINFO(inode));
}
static void ncp_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, ncp_i_callback);
}
static void init_once(void *foo)
{
struct ncp_inode_info *ei = (struct ncp_inode_info *) foo;

9
fs/nfs/inode.c

@ -1438,11 +1438,18 @@ struct inode *nfs_alloc_inode(struct super_block *sb)
return &nfsi->vfs_inode;
}
void nfs_destroy_inode(struct inode *inode)
static void nfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
}
void nfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, nfs_i_callback);
}
static inline void nfs4_init_once(struct nfs_inode *nfsi)
{
#ifdef CONFIG_NFS_V4

10
fs/nilfs2/super.c

@ -162,10 +162,13 @@ struct inode *nilfs_alloc_inode(struct super_block *sb)
return &ii->vfs_inode;
}
void nilfs_destroy_inode(struct inode *inode)
static void nilfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
INIT_LIST_HEAD(&inode->i_dentry);
if (mdi) {
kfree(mdi->mi_bgl); /* kfree(NULL) is safe */
kfree(mdi);
@ -173,6 +176,11 @@ void nilfs_destroy_inode(struct inode *inode)
kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode));
}
void nilfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, nilfs_i_callback);
}
static int nilfs_sync_super(struct nilfs_sb_info *sbi, int flag)
{
struct the_nilfs *nilfs = sbi->s_nilfs;

9
fs/ntfs/inode.c

@ -332,6 +332,13 @@ struct inode *ntfs_alloc_big_inode(struct super_block *sb)
return NULL;
}
static void ntfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
}
void ntfs_destroy_big_inode(struct inode *inode)
{
ntfs_inode *ni = NTFS_I(inode);
@ -340,7 +347,7 @@ void ntfs_destroy_big_inode(struct inode *inode)
BUG_ON(ni->page);
if (!atomic_dec_and_test(&ni->count))
BUG();
kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
call_rcu(&inode->i_rcu, ntfs_i_callback);
}
static inline ntfs_inode *ntfs_alloc_extent_inode(void)

9
fs/ocfs2/dlmfs/dlmfs.c

@ -351,11 +351,18 @@ static struct inode *dlmfs_alloc_inode(struct super_block *sb)
return &ip->ip_vfs_inode;
}
static void dlmfs_destroy_inode(struct inode *inode)
static void dlmfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(dlmfs_inode_cache, DLMFS_I(inode));
}
static void dlmfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, dlmfs_i_callback);
}
static void dlmfs_evict_inode(struct inode *inode)
{
int status;

9
fs/ocfs2/super.c

@ -569,11 +569,18 @@ static struct inode *ocfs2_alloc_inode(struct super_block *sb)
return &oi->vfs_inode;
}
static void ocfs2_destroy_inode(struct inode *inode)
static void ocfs2_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
}
static void ocfs2_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, ocfs2_i_callback);
}
static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
unsigned int cbits)
{

9
fs/openpromfs/inode.c

@ -343,11 +343,18 @@ static struct inode *openprom_alloc_inode(struct super_block *sb)
return &oi->vfs_inode;
}
static void openprom_destroy_inode(struct inode *inode)
static void openprom_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(op_inode_cachep, OP_I(inode));
}
static void openprom_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, openprom_i_callback);
}
static struct inode *openprom_iget(struct super_block *sb, ino_t ino)
{
struct inode *inode;

9
fs/proc/inode.c

@ -65,11 +65,18 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
return inode;
}
static void proc_destroy_inode(struct inode *inode)
static void proc_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(proc_inode_cachep, PROC_I(inode));
}
static void proc_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, proc_i_callback);
}
static void init_once(void *foo)
{
struct proc_inode *ei = (struct proc_inode *) foo;

9
fs/qnx4/inode.c

@ -425,11 +425,18 @@ static struct inode *qnx4_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void qnx4_destroy_inode(struct inode *inode)
static void qnx4_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode));
}
static void qnx4_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, qnx4_i_callback);
}
static void init_once(void *foo)
{
struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo;

9
fs/reiserfs/super.c

@ -529,11 +529,18 @@ static struct inode *reiserfs_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void reiserfs_destroy_inode(struct inode *inode)
static void reiserfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
}
static void reiserfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, reiserfs_i_callback);
}
static void init_once(void *foo)
{
struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;

9
fs/romfs/super.c

@ -400,11 +400,18 @@ static struct inode *romfs_alloc_inode(struct super_block *sb)
/*
* return a spent inode to the slab cache
*/
static void romfs_destroy_inode(struct inode *inode)
static void romfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(romfs_inode_cachep, ROMFS_I(inode));
}
static void romfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, romfs_i_callback);
}
/*
* get filesystem statistics
*/

9
fs/squashfs/super.c

@ -440,11 +440,18 @@ static struct inode *squashfs_alloc_inode(struct super_block *sb)
}
static void squashfs_destroy_inode(struct inode *inode)
static void squashfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(squashfs_inode_cachep, squashfs_i(inode));
}
static void squashfs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, squashfs_i_callback);
}
static struct file_system_type squashfs_fs_type = {
.owner = THIS_MODULE,

9
fs/sysv/inode.c

@ -333,11 +333,18 @@ static struct inode *sysv_alloc_inode(struct super_block *sb)
return &si->vfs_inode;
}
static void sysv_destroy_inode(struct inode *inode)
static void sysv_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
}
static void sysv_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, sysv_i_callback);
}
static void init_once(void *p)
{
struct sysv_inode_info *si = (struct sysv_inode_info *)p;

10
fs/ubifs/super.c

@ -272,12 +272,20 @@ static struct inode *ubifs_alloc_inode(struct super_block *sb)
return &ui->vfs_inode;
};
static void ubifs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct ubifs_inode *ui = ubifs_inode(inode);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ubifs_inode_slab, ui);
}
static void ubifs_destroy_inode(struct inode *inode)
{
struct ubifs_inode *ui = ubifs_inode(inode);
kfree(ui->data);
kmem_cache_free(ubifs_inode_slab, inode);
call_rcu(&inode->i_rcu, ubifs_i_callback);
}
/*

9
fs/udf/super.c

@ -139,11 +139,18 @@ static struct inode *udf_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void udf_destroy_inode(struct inode *inode)
static void udf_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(udf_inode_cachep, UDF_I(inode));
}
static void udf_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, udf_i_callback);
}
static void init_once(void *foo)
{
struct udf_inode_info *ei = (struct udf_inode_info *)foo;

9
fs/ufs/super.c

@ -1412,11 +1412,18 @@ static struct inode *ufs_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void ufs_destroy_inode(struct inode *inode)
static void ufs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
}
static void ufs_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, ufs_i_callback);
}
static void init_once(void *foo)
{
struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;

13
fs/xfs/xfs_iget.c

@ -91,6 +91,17 @@ xfs_inode_alloc(
return ip;
}
STATIC void
xfs_inode_free_callback(
struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct xfs_inode *ip = XFS_I(inode);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_zone_free(xfs_inode_zone, ip);
}
void
xfs_inode_free(
struct xfs_inode *ip)
@ -134,7 +145,7 @@ xfs_inode_free(
ASSERT(!spin_is_locked(&ip->i_flags_lock));
ASSERT(completion_done(&ip->i_flush));
kmem_zone_free(xfs_inode_zone, ip);
call_rcu(&ip->i_vnode.i_rcu, xfs_inode_free_callback);
}
/*

5
include/linux/fs.h

@ -737,7 +737,10 @@ struct inode {
struct list_head i_wb_list; /* backing dev IO list */
struct list_head i_lru; /* inode LRU list */
struct list_head i_sb_list;
struct list_head i_dentry;
union {
struct list_head i_dentry;
struct rcu_head i_rcu;
};
unsigned long i_ino;
atomic_t i_count;
unsigned int i_nlink;

1
include/linux/net.h

@ -120,7 +120,6 @@ enum sock_shutdown_cmd {
struct socket_wq {
wait_queue_head_t wait;
struct fasync_struct *fasync_list;
struct rcu_head rcu;
} ____cacheline_aligned_in_smp;
/**

9
ipc/mqueue.c

@ -237,11 +237,18 @@ static struct inode *mqueue_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
static void mqueue_destroy_inode(struct inode *inode)
static void mqueue_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(mqueue_inode_cachep, MQUEUE_I(inode));
}
static void mqueue_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, mqueue_i_callback);
}
static void mqueue_evict_inode(struct inode *inode)
{
struct mqueue_inode_info *info;

9
mm/shmem.c