nfs41: nfs41: fix state manager deadlock in session reset

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If the session is reset during state recovery, the state manager thread can
sleep on the slot_tbl_waitq causing a deadlock.

Add a completion framework to the session.  Have the state manager thread set
a new session state (NFS4CLNT_SESSION_DRAINING) and wait for the session slot
table to drain.

Signal the state manager thread in nfs41_sequence_free_slot when the
NFS4CLNT_SESSION_DRAINING bit is set and the session is drained.

Reported-by: Trond Myklebust <trond@netapp.com>
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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This commit is contained in:

Andy Adamson 2009-12-04 15:55:38 -05:00 • committed by Trond Myklebust

parent 05f0d23647

commit ea028ac925

4 changed files with 34 additions and 9 deletions

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1

fs/nfs/nfs4_fs.h

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26

fs/nfs/nfs4proc.c

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15

fs/nfs/nfs4state.c

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