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NFSv4.1: Get rid of the NFS_LAYOUT_DESTROYED state

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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>
This commit is contained in:
Trond Myklebust
2012-09-21 14:48:04 -04:00
parent 579342785f
commit 8006bfba36
3 changed files with 2 additions and 17 deletions
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3
fs/nfs/nfs4filelayout.c
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@@ -279,8 +279,7 @@ filelayout_reset_to_mds(struct pnfs_layout_segment *lseg)
{
struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg);
return pnfs_test_layout_destroyed(lseg->pls_layout) ||
filelayout_test_devid_unavailable(node);
return filelayout_test_devid_unavailable(node);
}
/*