PR/50375 CVS commit: [netbsd-7-0] src/sys/kern

["Soren Jacobsen" <snj%netbsd.org@localhost>]

The following reply was made to PR kern/50375; it has been noted by GNATS.

From: "Soren Jacobsen" <snj%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/50375 CVS commit: [netbsd-7-0] src/sys/kern
Date: Tue, 26 Jan 2016 23:44:12 +0000

 Module Name:	src
 Committed By:	snj
 Date:		Tue Jan 26 23:44:11 UTC 2016
 
 Modified Files:
 	src/sys/kern [netbsd-7-0]: vfs_vnode.c
 
 Log Message:
 Pull up following revision(s) (requested by hannken in ticket #1070):
 	sys/kern/vfs_vnode.c: revision 1.46 via patch
 Take the vnode lock before the vnode is marked VI_CHANGING and fed
 to vclean().  Prevents a deadlock with two null mounts on the same
 physical mount where one thread tries to vclean() a layer node and
 another thread tries to vget() a layer node pointing to the same
 physical node.
 Fixes PR kern/50375 layerfs (nullfs) locking problem leading to livelock
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.37.2.1 -r1.37.2.1.2.1 src/sys/kern/vfs_vnode.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.