Author: jhb
Date: Fri Jan 22 15:12:01 2010
New Revision: 202811
URL: http://svn.freebsd.org/changeset/base/202811
Log:
MFC 191028:
Use a shared vnode lock for reads in vn_rdwr().
Modified:
stable/7/sys/kern/vfs_vnops.c
Directory Properties:
stable/7/sys/ (props changed)
stable/7/sys/cddl/contrib/opensolaris/ (props changed)
stable/7/sys/contrib/dev/acpica/ (props changed)
stable/7/sys/contrib/pf/ (props changed)
Modified: stable/7/sys/kern/vfs_vnops.c
==============================================================================
--- stable/7/sys/kern/vfs_vnops.c Fri Jan 22 14:44:15 2010
(r202810)
+++ stable/7/sys/kern/vfs_vnops.c Fri Jan 22 15:12:01 2010
(r202811)
@@ -377,15 +377,8 @@ vn_rdwr(rw, vp, base, len, offset, segfl
lock_flags = LK_EXCLUSIVE;
}
vn_lock(vp, lock_flags | LK_RETRY, td);
- } else {
- /*
- * XXX This should be LK_SHARED but the VFS in releng7
- * needs some patches before this can be done.
- * The same applies to the lock_flags above and to a
- * similar place below.
- */
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
- }
+ } else
+ vn_lock(vp, LK_SHARED | LK_RETRY, td);
}
ASSERT_VOP_LOCKED(vp, "IO_NODELOCKED with no vp lock held");
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