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Date: Thu, 30 Oct 2003 20:28:10 -0500
From: Alexander Kabaev <kabaev@mail.ru>
To: Kris Kennaway <kris@obsecurity.org>
Message-Id: <20031030202810.083730c3.kabaev@mail.ru>
In-Reply-To: <20031030181843.GA29627@rot13.obsecurity.org>
References: <20031030181843.GA29627@rot13.obsecurity.org>
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Subject: Re: exclusive sleep mutex mntvnode r = 0 (0xffffffff80758220)
 /a/asami/portbuild/amd64/src-client/sys/ufs/ffs/ffs_vfsops.c:1172
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On Thu, 30 Oct 2003 10:18:43 -0800
Kris Kennaway <kris@obsecurity.org> wrote:

> One of the amd64 machines died with the following.  The kernel is a
> few weeks old, so this might already be fixed.
> 
> Kris
> 
> malloc() of "64" with the following non-sleepable locks held:
> exclusive sleep mutex mntvnode r = 0 (0xffffffff80758220) locked @
> /a/asami/portbuild/amd64/src-client/sys/ufs/ffs/ffs_vfsops.c:1172
> recursed on non-recursive lock (sleep mutex) mntvnode @
> /a/asami/portbuild/amd64/src-client/sys/kern/vfs_subr.c:1054 first
> acquired @
> /a/asami/portbuild/amd64/src-client/sys/ufs/ffs/ffs_vfsops.c:1172
> panic: recurse Debugger("panic")
> Stopped at      Debugger+0x4b:  xchgl   %ebx,0x31599f
> db> where
> Debugger() at Debugger+0x4b
> panic() at panic+0x169
> witness_lock() at witness_lock+0x383
> _mtx_lock_flags() at _mtx_lock_flags+0x9c
> insmntque() at insmntque+0x2a
> vclean() at vclean+0x35b
> vgonel() at vgonel+0x51
> vrecycle() at vrecycle+0x5b
> ufs_inactive() at ufs_inactive+0x22c
> ufs_vnoperate() at ufs_vnoperate+0x14
> vrele() at vrele+0x11a
> ffs_sync() at ffs_sync+0x24f
> sync() at sync+0xdb
> syscall() at syscall+0x320
> Xfast_syscall() at Xfast_syscall+0xa7
> --- syscall (36, FreeBSD ELF64, sync), rip = 0x402084, rsp =
> 0x7ffffffff648, rbp = 0x3 --- db>

Known and being looked at.


-- 
Alexander Kabaev