diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-09-21 01:23:11 +0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-09-29 00:03:14 +0400 |
| commit | 6622c3ea059b2fed49924b74db41d1e0f065fbd3 (patch) | |
| tree | d8b362ec56159a57f7402e8d4f70d704f06a612b | |
| parent | 01d39ce82b565961abaf1930f54ccf7b32c96b15 (diff) | |
| download | linux-6622c3ea059b2fed49924b74db41d1e0f065fbd3.tar.xz | |
NFSv4.1: Free the pnfs_layout_hdr outside the inode->i_lock
None of the existing pNFS layout drivers seem to require the inode
to be locked while they free the layout header.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/pnfs.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 7ac5be36f132..08663146f5f5 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -213,7 +213,7 @@ pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) } static void -destroy_layout_hdr(struct pnfs_layout_hdr *lo) +pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) { struct nfs_inode *nfsi = NFS_I(lo->plh_inode); dprintk("%s: freeing layout cache %p\n", __func__, lo); @@ -222,14 +222,6 @@ destroy_layout_hdr(struct pnfs_layout_hdr *lo) /* Reset MDS Threshold I/O counters */ nfsi->write_io = 0; nfsi->read_io = 0; - pnfs_free_layout_hdr(lo); -} - -static void -pnfs_put_layout_hdr_locked(struct pnfs_layout_hdr *lo) -{ - if (atomic_dec_and_test(&lo->plh_refcount)) - destroy_layout_hdr(lo); } void @@ -238,8 +230,9 @@ pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) struct inode *inode = lo->plh_inode; if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { - destroy_layout_hdr(lo); + pnfs_detach_layout_hdr(lo); spin_unlock(&inode->i_lock); + pnfs_free_layout_hdr(lo); } } @@ -792,8 +785,12 @@ void pnfs_roc_release(struct inode *ino) spin_lock(&ino->i_lock); lo = NFS_I(ino)->layout; lo->plh_block_lgets--; - pnfs_put_layout_hdr_locked(lo); - spin_unlock(&ino->i_lock); + if (atomic_dec_and_test(&lo->plh_refcount)) { + pnfs_detach_layout_hdr(lo); + spin_unlock(&ino->i_lock); + pnfs_free_layout_hdr(lo); + } else + spin_unlock(&ino->i_lock); } void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |