NFSv4/pNFS: Fix a layoutget livelock loop

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If NFS_LAYOUT_RETURN_REQUESTED is set, but there is no value set for
the layout plh_return_seq, we can end up in a livelock loop in which
every layout segment retrieved by a new call to layoutget is immediately
invalidated by pnfs_layout_need_return().
To get around this, we should just set plh_return_seq to the current
value of the layout stateid's seqid.

Fixes: d474f96104 ("NFS: Don't return layout segments that are in use")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

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Trond Myklebust 2021-07-26 07:58:49 -04:00 • committed by Anna Schumaker

parent 71d3d0ebc8

commit e20772cbdf

1 changed files with 8 additions and 4 deletions

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fs/nfs/pnfs.c

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