This patch series adds:
. support for sending the CB_RECALL_ANY op.
There is only one nfsd4_callback, cl_recall_any, added for each
nfs4_client. Access to it must be serialized. For now it's done
by the cl_recall_any_busy flag since it's used only by the
delegation shrinker. If there is another consumer of cl_recall_any
then a spinlock must be used.
. the delegation shrinker that sends the advisory CB_RECALL_ANY
to the clients to release unused delegations.
v2:
. modify deleg_reaper to check and send CB_RECALL_ANY to client
only once per 5 secs.
v3:
. modify nfsd4_cb_recall_any_release to use nn->client_lock to
protect cl_recall_any_busy and call put_client_renew_locked
to decrement cl_rpc_users.
---
Dai Ngo (2):
NFSD: add support for sending CB_RECALL_ANY
NFSD: add delegation shrinker to react to low memory condition
fs/nfsd/netns.h | 3 ++
fs/nfsd/nfs4callback.c | 64 ++++++++++++++++++++++++++
fs/nfsd/nfs4state.c | 106 +++++++++++++++++++++++++++++++++++++++++++-
fs/nfsd/state.h | 10 +++++
fs/nfsd/xdr4cb.h | 6 +++
5 files changed, 188 insertions(+), 1 deletion(-)
