Date: Fri, 8 Feb 2002 15:21:45 -0800 From: "Eugene M. Kim" <gene@nttmcl.com> To: Julian Elischer <julian@elischer.org> Cc: David Wolfskill <david@catwhisker.org>, current@FreeBSD.ORG Subject: Re: Hang on flushing buffers w/today's -CURRENT, SMP system Message-ID: <20020208152145.B24821@alicia.nttmcl.com> In-Reply-To: <Pine.BSF.4.21.0202081438540.91961-100000@InterJet.elischer.org>; from julian@elischer.org on Fri, Feb 08, 2002 at 02:41:30PM -0800 References: <20020208143729.A23534@alicia.nttmcl.com> <Pine.BSF.4.21.0202081438540.91961-100000@InterJet.elischer.org>
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Attached is the requested DDB log (I guessed pid 7 `syncer' is the
process doing the sync; if this is wrong let me know).
Eugene
PS. I used the serial console, so don't feel sorry to ask. =)
On Fri, Feb 08, 2002 at 02:41:30PM -0800, Julian Elischer wrote:
>
>
>
>
> On Fri, 8 Feb 2002, Eugene M. Kim wrote:
>
> > On Fri, Feb 08, 2002 at 01:43:54PM -0800, Julian Elischer wrote:
> > >
> > > On Fri, 8 Feb 2002, David Wolfskill wrote:
> > > >
> > > > Waiting (max 60 seconds) for system process `vnlru' to stop...stopped
> > > > Waiting (max 60 seconds) for system process `bufdaemon' to stop...stopped
> > > > Waiting (max 60 seconds) for system process `syncer' to stop...stopped
> > > >
> > > > syncing disks... 7 7
> > >
> > > can you hit <CTL><ALT><ESC> and get into the debugger?
> >
> > My box shows the same symptom, and yes I can enter DDB. How may I help?
> >
> > Eugene
> >
>
> "show locks" whould be good.
> also 'ps'
> and the stack trace of the process doing the sync...
>
>
> tr <PID>
>
> if you can get a serial console that would be best of course.
>
> you may wait a while to see if dave can get into ddb on his serial
> console.
> that may save you a lot of writing :-)
>
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syncing disks... 4 4 Debugger("manual escape to debugger")
Stopped at Debugger+0x41: xorl %eax,%eax
db> show locks
exclusive (sleep mutex) Giant (0xc02e6100) locked @ /usr/src/sys/kern/kern_intr.c:532
db> ps
pid proc addr uid ppid pgrp flag stat wmesg wchan cmd
192 cc989300 cdbc5000 0 0 0 0000204 3 nfsidl c1d0538c nfsiod 3
191 cc989600 cdbc1000 0 0 0 0000204 3 nfsidl c1d05388 nfsiod 2
190 cc989900 cdbbd000 0 0 0 0000204 3 nfsidl c1d05384 nfsiod 1
189 cc989c00 cdbb9000 0 0 0 0000204 3 nfsidl c1d05380 nfsiod 0
9 cc98c000 cd1af000 0 0 0 0000204 3 pccbbev c1b39400 pccbb1
8 cc98c300 cd1ab000 0 0 0 0000204 3 pccbbev c1b39800 pccbb0
7 cc98c600 cd1a7000 0 0 0 0000204 3 ktsusp cc98c800 syncer
6 cc98c900 cd1a3000 0 0 0 0000204 3 ktsusp cc98cb00 vnlru
5 cc98cc00 cd19f000 0 0 0 0000204 3 ktsusp cc98ce00 bufdaemon
4 cc98cf00 cd19b000 0 0 0 0000204 3 pgzero c0327fc8 pagezero
3 cc98d200 cd197000 0 0 0 0000204 3 psleep c0327fdc vmdaemon
2 cc98d500 cd193000 0 0 0 0000204 3 psleep c02e06d8 pagedaemon
31 cc98d800 cc992000 0 0 0 0000204 6 irq8: rtc
30 cc98db00 cc98e000 0 0 0 0000204 6 irq0: clk
29 cc320f00 cc985000 0 0 0 0000204 6 irq4: sio0
28 cc321200 cc981000 0 0 0 0000204 6 swi0: tty:sio
27 cc321500 cc97d000 0 0 0 0000204 6 irq7: ppc0
26 cc321800 cc979000 0 0 0 0000204 6 irq12: psm0
25 cc321b00 cc975000 0 0 0 0000204 2 irq1: atkbd0
24 cc321e00 cc971000 0 0 0 0000204 3 usbevt c1b60210 usb0
--More--
23 cc322100 cc96d000 0 0 0 0000204 6 irq15: ata1
22 cc322400 cc969000 0 0 0 0000204 6 irq14: ata0
21 cc322700 cc964000 0 0 0 0000204 6 irq11: pccbb0++
20 cc322a00 cc95a000 0 0 0 0000204 6 irq5: pcm0
19 cc322d00 cc952000 0 0 0 0000204 6 irq13:
18 cc323000 cc94e000 0 0 0 0000204 6 swi5: acpitaskq
17 cc323300 cc94a000 0 0 0 0000204 6 swi5: task queue
16 cc323600 cc946000 0 0 0 0000204 6 swi3: cambio
15 cc323900 cc942000 0 0 0 0000204 6 swi2: camnet
14 cc323c00 cc93e000 0 0 0 0000204 3 sleep c0417120 random
13 cc323f00 cc93a000 0 0 0 0000204 6 swi4: vm
12 cc324200 cc936000 0 0 0 000020c 2 swi6: tty:sio clock
11 cc324500 cc932000 0 0 0 0000204 6 swi1: net
10 cc324800 cc32d000 0 0 0 000020c 2 idle
1 cc324b00 cc329000 0 0 1 0004200 2 init
0 c02c4200 c0480000 0 0 0 0000200 3 sched c02c4200 swapper
db> tr 7
mi_switch(cc98c800,cc98c600,c1b688dc,1,0) at mi_switch+0x153
msleep(cc98c800,cc98c814,68,c0288668,0,cc98c800) at msleep+0x322
kthread_suspend_check(cc98c600,cc98c704,c01b5cf4,cc98c600,cd1aacf8) at kthread_suspend_check+0x50
sched_sync(0,cd1aad48,0,c01b5cf4,0) at sched_sync+0x4c
fork_exit(c01b5cf4,0,cd1aad48) at fork_exit+0x9e
fork_trampoline() at fork_trampoline+0x8
db>
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