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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-09-21 22:48:04 +0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-09-29 00:03:16 +0400 |
| commit | 8006bfba36d42b6976ed92979f51e5f9bef2625c (patch) | |
| tree | 83b5c3761408b6cbfef4112431ef466b5392f909 /fs/nfs/pnfs.c | |
| parent | 579342785f7069d32e9637ef30d59c4256dcec3d (diff) | |
| download | linux-8006bfba36d42b6976ed92979f51e5f9bef2625c.tar.xz | |
NFSv4.1: Get rid of the NFS_LAYOUT_DESTROYED state
We already have a mechanism for blocking LAYOUTGET by means of the
plh_block_lgets counter. The only "service" that NFS_LAYOUT_DESTROYED
provides at this point is to block layoutget once the layout segment
list is empty, which basically means that you have to wait until
the pnfs_layout_hdr is destroyed before you can do pNFS on that file
again.
This patch enables the reuse of the pnfs_layout_hdr if the layout
segment list is empty.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
| -rw-r--r-- | fs/nfs/pnfs.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index fcc72ecf2fd7..bda88a275071 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -331,8 +331,6 @@ pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, list_del_init(&lseg->pls_list); /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ atomic_dec(&lo->plh_refcount); - if (list_empty(&lo->plh_segs)) - set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags); rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); } @@ -463,10 +461,8 @@ pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, dprintk("%s:Begin lo %p\n", __func__, lo); - if (list_empty(&lo->plh_segs)) { - set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags); + if (list_empty(&lo->plh_segs)) return 0; - } list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) if (!recall_range || should_free_lseg(&lseg->pls_range, recall_range)) { @@ -590,7 +586,6 @@ pnfs_layoutgets_blocked(struct pnfs_layout_hdr *lo, nfs4_stateid *stateid, (int)(lo->plh_barrier - be32_to_cpu(stateid->seqid)) >= 0) return true; return lo->plh_block_lgets || - test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags) || test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || (list_empty(&lo->plh_segs) && (atomic_read(&lo->plh_outstanding) > lget)); @@ -912,8 +907,6 @@ pnfs_find_alloc_layout(struct inode *ino, dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); if (nfsi->layout) { - if (test_bit(NFS_LAYOUT_DESTROYED, &nfsi->layout->plh_flags)) - return NULL; pnfs_get_layout_hdr(nfsi->layout); return nfsi->layout; } |