This patch series contains a set of minor optimisations that are mainly
useful against pNFS systems that may incur a higher performance penalty
on unnecessary attribute requests by triggering an internal RPC call from
the MDS to the DS.
- Speed up state recovery after a server reboot by avoiding unnecessary
GETATTR and ACCESS checks.
- Avoid unnecessary attribute revalidations on operations such as
OPEN_DOWNGRADE, where we don't yet need to update close-to-open
cache consistency attributes.
- Avoid unnecessary attribute revalidations when we hold a delegation.
Trond Myklebust (5):
NFSv4: Don't check file access when reclaiming state
NFSv4: Don't ask for the change attribute when reclaiming state
NFSv4: Don't request a GETATTR on open_downgrade.
NFSv4: Don't request close-to-open attribute when holding a delegation
NFSv4: Optimise away forced revalidation when we know the attributes
are OK
fs/nfs/delegation.c | 4 ----
fs/nfs/inode.c | 2 +-
fs/nfs/nfs4proc.c | 25 +++++++++++++++++++------
fs/nfs/nfs4xdr.c | 13 ++++---------
4 files changed, 24 insertions(+), 20 deletions(-)
--
2.9.3
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