From nobody@FreeBSD.org  Tue Mar 25 19:10:08 2008
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Message-Id: <200803251909.m2PJ9t42073767@www.freebsd.org>
Date: Tue, 25 Mar 2008 19:09:55 GMT
From: Francois Ranchin <fyr@fyrou.net>
To: freebsd-gnats-submit@FreeBSD.org
Subject: [zfs][lor] exclusive sleep mutex struct mount mtx
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>Number:         122087
>Category:       kern
>Synopsis:       [zfs][lor] exclusive sleep mutex struct mount mtx
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    pjd
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Mar 25 19:20:01 UTC 2008
>Closed-Date:    Wed May 21 21:54:43 UTC 2008
>Last-Modified:  Wed May 21 21:54:43 UTC 2008
>Originator:     Francois Ranchin
>Release:        7.0-STABLE
>Organization:
>Environment:
FreeBSD noway.fyrou.net 7.0-STABLE FreeBSD 7.0-STABLE #0: Mon Mar 24 22:02:50 CET 2008     root@noway.fyrou.net:/usr/obj/usr/src/sys/NOWAY  i386

>Description:
Mar 24 23:14:31 noway kernel: lock order reversal:
Mar 24 23:14:31 noway kernel: 1st 0xc6124804 struct mount mtx (struct mount mtx) @ /usr/src/sys/modules/zfs/../../compat/opensolaris/kern/opensolaris_vfs.c:206
Mar 24 23:14:31 noway kernel: 2nd 0xc59cc010 sleep mtxpool (sleep mtxpool) @ /usr/src/sys/kern/kern_resource.c:1273
Mar 24 23:14:31 noway kernel: uma_zalloc_arg: zone "256" with the following non-sleepable locks held:
Mar 24 23:14:31 noway kernel: exclusive sleep mutex struct mount mtx r = 0 (0xc6124804) locked @ /usr/src/sys/modules/zfs/../../compat/opensolaris/kern/opensolaris_vfs.c:206
Mar 24 23:14:31 noway kernel: uma_zalloc_arg: zone "256" with the following non-sleepable locks held:
Mar 24 23:14:31 noway kernel: exclusive sleep mutex struct mount mtx r = 0 (0xc6124568) locked @ /usr/src/sys/modules/zfs/../../compat/opensolaris/kern/opensolaris_vfs.c:206

This messages comes after the 14th march 2008. I have played from this date to 24th with a debug kernel for testing the age driver from Pyun. And nerver seen. csup the 24th, compiled and installed with debuging active and seen these messages. 
>How-To-Repeat:
play with zfs,  I have an hourly snapshot running. One of them become undestroyable without panicing .
>Fix:


>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->pjd 
Responsible-Changed-By: remko 
Responsible-Changed-When: Tue Mar 25 19:41:05 UTC 2008 
Responsible-Changed-Why:  
Over to maintainer 

http://www.freebsd.org/cgi/query-pr.cgi?pr=122087 
State-Changed-From-To: open->closed 
State-Changed-By: pjd 
State-Changed-When: ro 21 maj 21:53:30 2008 UTC 
State-Changed-Why:  
I believe this is fixed. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=122087 
>Unformatted:
