[issue1126] panic: assertion: volume->io.lock.refs == 0 in hammer_unload_volume

[Matthew Dillon]

:Thomas Nikolajsen <thomas.nikolajsen at mail.dk> added the comment:
:
:Have also seen this panic when using local file system for /usr/obj
:
:Crash dump on leaf in crash/hammer/ask/*.12.
:(using GENERIC kernel)

    Did you test that patch I emailed?  I have included it again.

					-Matt

Index: hammer_io.c
===================================================================
RCS file: /cvs/src/sys/vfs/hammer/hammer_io.c,v
retrieving revision 1.54
diff -u -p -r1.54 hammer_io.c
--- hammer_io.c	29 Aug 2008 20:19:08 -0000	1.54
+++ hammer_io.c	8 Sep 2008 22:05:47 -0000
@@ -279,7 +279,7 @@ hammer_io_inval(hammer_volume_t volume, 
 		bundirty(bp);
 		iou->io.reclaim = 1;
 		iou->io.waitdep = 1;
-		KKASSERT(iou->io.lock.refs == 0);
+		KKASSERT(iou->io.lock.refs == 1);
 		hammer_rel_buffer(&iou->buffer, 0);
 		/*hammer_io_deallocate(bp);*/
 	} else {