Date: Sun, 11 Apr 2004 12:42:30 -0600 From: Scott Long <scottl@freebsd.org> To: Dmitry Morozovsky <marck@rinet.ru> Cc: cpghost@cordula.ws Subject: Re: "sleeping without a mutex" panic with FixitCD from today's SNAP Message-ID: <40799196.7080200@freebsd.org> In-Reply-To: <20040411223354.B93412@woozle.rinet.ru> References: <20040410134802.J60704@woozle.rinet.ru> <20040410144803.BBB2340826@fw.farid-hajji.net> <40780DB5.1080006@freebsd.org> <20040410233958.S72270@woozle.rinet.ru> <40798A50.6000105@freebsd.org> <20040411223354.B93412@woozle.rinet.ru>
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Dmitry Morozovsky wrote:
> On Sun, 11 Apr 2004, Scott Long wrote:
>
> [snip]
>
> SL> > SL> > <panic: sleeping without a mutex
> SL> > SL> > at line 144 in file /usr/src/sys/kern/kern_synch.c>
> SL> > SL> >
> SL> > SL> > The panic is 100% reproducible.
> SL> > SL>
> SL> > SL> Providing a backtrace from the debugger here is very important. Any
> SL> > SL> chance that you could do that?
> SL> >
> SL> > My chances are pretty low, as I have no -current systems runnning. I cat write
> SL> > ddb's traceback though if it's helpful (supposedly, I also can make serial
> SL> > console for that).
> SL>
> SL> DDB traceback is fine. Without some sort of traceback, it's impossible
> SL> to know what is triggering the message in msleep that you are seeing.
>
> Well, here it is (via serial console):
>
> RockRidge Extension
> panic: sleeping without a mutex
> at line 144 in file /usr/src/sys/kern/kern_synch.c
> cpuid = 0;
> Debugger("panic")
> Stopped at Debugger+0x46: xchgl %ebx,in_Debugger.0
> db> tr
> Debugger(c07bf6c1) at Debugger+0x46
> __panic(c07bfedf,90,c07bfeb7,653,c08aee6c) at __panic+0x13d
> msleep(c0875ae0,0,1a0,c07d3d27,0) at msleep+0xc2
> random_read(c087b3dc,d7618c88,20000,c07fc6e0,74) at random_read+0x41
> spec_read(d7618bec,d7618c38,c063b84d,d7618bec,d7618c88) at spec_read+0x12c
> spec_vnoperate(d7618bec) at spec_vnoperate+0x13
> vn_read(c47d9330,d7618c88,c1d19600,0,c464b690) at vn_read+0x185
> dofileread(c464b690,c47d9330,4,bfbfe4dc,74) at dofileread+0xb0
> read(c464b690,d7618d14,3,1,296) at read+0x3b
> syscall(2f,2f,2f,855b000,3e) at syscall+0x217
> Xint0x80_syscall() at Xint0x80_syscall+0x1d
> --- syscall (3, FreeBSD ELF32, read), eip = 0x82776ab, esp = 0xbfbfe49c, ebp =
> 0xbfbfe568 ---
> db>
>
> Combination to reproduce:
> - boot from fixit CD
> - select fixit, live CD
> - Enter to confirm mount
>
> Any other info we need? (again, it's -current snapshot from 20040410 made on
> 4.9p4)
Excellent, it's exactly the information that is needed. Thanks!
Scott
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