From owner-freebsd-bugs  Tue Jul 10 10:56:42 2001
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From: Larry Rosenman <ler@airmail.net>
Date: Tue, 10 Jul 2001 17:56:10 GMT
Message-ID: <20010710.17561000@ler-freebie.iadfw.net>
Subject: re: kern/26224: VFS Panic/SMP/CFLOW(HEAVY network)/Heavy NFS
To: Tor.Egge@fast.no
Cc: neteng@tide.iadfw.net, freebsd-bugs@FreeBSD.ORG
In-Reply-To: <200107101714.TAA11209@midten.fast.no>
References: <200107101320.f6ADK1152861@freefall.freebsd.org> <200107101714.TAA11209@midten.fast.no>
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Thomas Moestl looked at the dump, and found an offending piece of code.

He said he was looking into a fix.

LER

>>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<<

On 7/10/01, 12:14:14 PM, Tor.Egge@fast.no wrote regarding re: kern/26224=
:=20
VFS Panic/SMP/CFLOW(HEAVY network)/Heavy NFS:


> The panic message and the stack backtrace indicates that a process has=

> gone to sleep while holding a vnode interlock.  When pagedaemon tries
> to obtain the vnode interlock (in vput() called from vm_pageout()) the=

> machine will either hang (if the vnode interlock was held by the other=

> CPU) or panic (if the vnode interlock was held by the same CPU).

> Use
>       ps axlww -N kernel.debug.76 -M vmcore.76

> to list the processes on the system when it died.

> Use gdb to list the kernel stack of each process.  The offending
> process probably has an uncommon WCHAN string.

> - Tor Egge

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