Date: Thu, 19 Feb 2009 22:28:48 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern vfs_cache.c src/sys/nfsclient nfs_vnops.c nfsnode.h src/sys/sys vnode.h Message-ID: <200902192230.n1JMU7bc039811@repoman.freebsd.org>
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jhb 2009-02-19 22:28:48 UTC
FreeBSD src repository
Modified files:
sys/kern vfs_cache.c
sys/nfsclient nfs_vnops.c nfsnode.h
sys/sys vnode.h
Log:
SVN rev 188833 on 2009-02-19 22:28:48Z by jhb
Enable caching of negative pathname lookups in the NFS client. To avoid
stale entries, we save a copy of the directory's modification time when
the first negative cache entry was added in the directory's NFS node.
When a negative cache entry is hit during a pathname lookup, the parent
directory's modification time is checked. If it has changed, all of the
negative cache entries for that parent are purged and the lookup falls
back to using the RPC. This required adding a new cache_purge_negative()
method to the name cache to purge only negative cache entries for a given
directory.
Submitted by: mohans, Rick Macklem, Ricardo Labiaga @ NetApp
Reviewed by: mohans
Revision Changes Path
1.136 +18 -0 src/sys/kern/vfs_cache.c
1.300 +53 -8 src/sys/nfsclient/nfs_vnops.c
1.64 +1 -0 src/sys/nfsclient/nfsnode.h
1.348 +1 -0 src/sys/sys/vnode.h
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