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| author | Benjamin Coddington <bcodding@redhat.com> | 2017-04-11 12:50:10 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-04-21 10:45:01 -0400 |
| commit | 7d6ddf88c4db372689c8aa65ea652d0514d66c06 (patch) | |
| tree | 8fb586be995259ff4c98a01ee9ed183b107195b5 /include/linux/nfs_page.h | |
| parent | 50f2112cf7a3e62a8d33838eb205d5fef306457a (diff) | |
| download | lwn-7d6ddf88c4db372689c8aa65ea652d0514d66c06.tar.gz lwn-7d6ddf88c4db372689c8aa65ea652d0514d66c06.zip | |
NFS: Add an iocounter wait function for async RPC tasks
By sleeping on a new NFS Unlock-On-Close waitqueue, rpc tasks may wait for
a lock context's iocounter to reach zero. The rpc waitqueue is only woken
when the open_context has the NFS_CONTEXT_UNLOCK flag set in order to
mitigate spurious wake-ups for any iocounter reaching zero.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/nfs_page.h')
| -rw-r--r-- | include/linux/nfs_page.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h index 6f01e28bba27..247cc3d3498f 100644 --- a/include/linux/nfs_page.h +++ b/include/linux/nfs_page.h @@ -141,6 +141,7 @@ extern int nfs_page_group_lock(struct nfs_page *, bool); extern void nfs_page_group_lock_wait(struct nfs_page *); extern void nfs_page_group_unlock(struct nfs_page *); extern bool nfs_page_group_sync_on_bit(struct nfs_page *, unsigned int); +extern bool nfs_async_iocounter_wait(struct rpc_task *, struct nfs_lock_context *); /* * Lock the page of an asynchronous request |