NFSD: add delegation reaper to react to low memory condition

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[ Upstream commit 44df6f439a ]

The delegation reaper is called by nfsd memory shrinker's on
the 'count' callback. It scans the client list and sends the
courtesy CB_RECALL_ANY to the clients that hold delegations.

To avoid flooding the clients with CB_RECALL_ANY requests, the
delegation reaper sends only one CB_RECALL_ANY request to each
client per 5 seconds.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
[ cel: moved definition of RCA4_TYPE_MASK_RDATA_DLG ]
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dai Ngo 2022-11-16 19:44:47 -08:00 • committed by Greg Kroah-Hartman

parent f30f07ba57

commit f28dae5463

3 changed files with 102 additions and 4 deletions

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88

fs/nfsd/nfs4state.c

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5

fs/nfsd/state.h

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13

include/linux/nfs4.h

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