NFS: Add an iocounter wait function for async RPC tasks

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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>

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Benjamin Coddington 2017-04-11 12:50:10 -04:00 • committed by Trond Myklebust

parent 50f2112cf7

commit 7d6ddf88c4

5 changed files with 37 additions and 1 deletions

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1

fs/nfs/client.c

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34

fs/nfs/pagelist.c

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include/linux/nfs_fs.h

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include/linux/nfs_fs_sb.h

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include/linux/nfs_page.h

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