Author: jhb
Date: Fri Mar 20 15:52:11 2009
New Revision: 190159
URL: http://svn.freebsd.org/changeset/base/190159
Log:
MFC: Add a new vfs.nfs.prime_access_cache sysctl to determine whether or
not nfs_getattr() will use an ACCESS RPC to prime the access cache instead
of a simple GETATTR RPC. The sysctl defaults to enabled to maintain the
previous behavior.
Modified:
stable/7/sys/ (props changed)
stable/7/sys/contrib/pf/ (props changed)
stable/7/sys/dev/ath/ath_hal/ (props changed)
stable/7/sys/dev/cxgb/ (props changed)
stable/7/sys/nfsclient/nfs_vnops.c
Modified: stable/7/sys/nfsclient/nfs_vnops.c
==============================================================================
--- stable/7/sys/nfsclient/nfs_vnops.c Fri Mar 20 14:32:51 2009
(r190158)
+++ stable/7/sys/nfsclient/nfs_vnops.c Fri Mar 20 15:52:11 2009
(r190159)
@@ -208,6 +208,11 @@ static int nfsaccess_cache_timeout = NFS
SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
&nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
+static int nfs_prime_access_cache = 1;
+SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
+ &nfs_prime_access_cache, 0,
+ "Prime NFS ACCESS cache when fetching attributes");
+
static int nfsv3_commit_on_close = 0;
SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
&nfsv3_commit_on_close, 0, "write+commit on close, else only write");
@@ -643,7 +648,7 @@ nfs_getattr(struct vop_getattr_args *ap)
*/
if (nfs_getattrcache(vp, &vattr) == 0)
goto nfsmout;
- if (v3 && nfsaccess_cache_timeout > 0) {
+ if (v3 && nfs_prime_access_cache && nfsaccess_cache_timeout > 0) {
nfsstats.accesscache_misses++;
nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_td, ap->a_cred);
if (nfs_getattrcache(vp, &vattr) == 0)
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