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vfs_vnode_iterator_next(): if a vnode is reclaiming (VI_XLOCK) skip 

the filter.  Vget() will wait until the vnode disappeared.  No more
"dangling vnode" panics on unmount.
This commit is contained in:
hannken 2014-05-30 08:46:00 +00:00
parent de57916f59
commit fb88097aee
1 changed files with 4 additions and 5 deletions
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9
sys/kern/vfs_mount.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: vfs_mount.c,v 1.29 2014/05/24 16:34:04 christos Exp $ */
/* $NetBSD: vfs_mount.c,v 1.30 2014/05/30 08:46:00 hannken Exp $ */
/*-
* Copyright (c) 1997-2011 The NetBSD Foundation, Inc.
@ -67,7 +67,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vfs_mount.c,v 1.29 2014/05/24 16:34:04 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: vfs_mount.c,v 1.30 2014/05/30 08:46:00 hannken Exp $");
#define _VFS_VNODE_PRIVATE
@ -393,9 +393,8 @@ again:
return NULL;
}
mutex_enter(vp->v_interlock);
while (ISSET(vp->v_iflag, VI_MARKER) ||
ISSET(vp->v_iflag, VI_XLOCK) ||
(f && !(*f)(cl, vp))) {
if (ISSET(vp->v_iflag, VI_MARKER) ||
(f && !ISSET(vp->v_iflag, VI_XLOCK) && !(*f)(cl, vp))) {
mutex_exit(vp->v_interlock);
vp = TAILQ_NEXT(vp, v_mntvnodes);
goto again;