svn commit: r209948 - head/sys/nfsclient
John Baldwin
jhb at freebsd.org
Mon Jul 12 15:08:46 UTC 2010
On Monday, July 12, 2010 10:27:49 am John Baldwin wrote:
> Author: jhb
> Date: Mon Jul 12 14:27:49 2010
> New Revision: 209948
> URL: http://svn.freebsd.org/changeset/base/209948
>
> Log:
> A previous change moved the GETATTR RPC for open() calls that hit in the
> name cache up into nfs_lookup() instead of nfs_open(). Continue this
> trend by flushing the attribute cache for leaf nodes in nfs_lookup() during
> an open() if we do a LOOKUP RPC. For NFSv3 this should generally be a NOP
> as the attributes are flushed before fetching the post-op attributes from
> the LOOKUP RPC which most (all?) NFSv3 servers provide, so the post-op
> attributes should populate the cache.
>
> Now all NFS open() calls will always clear the cached attributes during the
> nfs_lookup() prior to nfs_open() in the !NMODIFIED case to provide CTOC.
> As a result, we can remove the conditional flushing of the attribute
> cache from nfs_open().
One benefit is that we can now remove td_syscalls which added extra overhead
to each system call.
--
John Baldwin
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