Re: 2.6.21-rc2-mm1

Andrew Morton
2007-03-03T12:07:10Z

On Sat, 03 Mar 2007 11:08:51 +0100 Michal Piotrowski <michal.k.k.piotrowski@gmail.com> wrote:

> Andrew Morton napisał(a):
> > On Sat, 03 Mar 2007 02:22:59 +0100
> > Michal Piotrowski <michal.k.k.piotrowski@gmail.com> wrote:
> >
> >> Andrew Morton napisa__(a):
> >>> On Sat, 3 Mar 2007 00:42:33 +0100
> >>> "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com> wrote:
> >>>
> >>>> On 02/03/07, Andrew Morton <akpm@linux-foundation.org> wrote:
> >>>>> Temporarily at
> >>>>>
> >>>>> http://userweb.kernel.org/~akpm/2.6.21-rc2-mm1/
> >>>>>
> >>>> I have noticed some strange system behavior. When i try to build a
> >>>> kernel (medium load) - X, keyboard, mouse and sound hangs.
> >>>>
> >>>> I can ping machine and I can use magic SysRq key, but that's all.
> >>>>
> >>>> 2.6.20-mm2 was fine, 2.6.21-rc2 works well (over 800 patches since
> >>>> 2.6.20-mm2 - great...)
> >>>>
> >>>> NIL (Nothing Interesting in Logs)
> >>>>
> >>> Can we see the sysrq-T output please?
> >>>
> >> http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc2-mm1/sys.log
> >>
> >
> > Well that's all very dull - everything's just sitting there asleep.
> >
> > If it was just X then I'd suspect the psmouse changes (are you PS2 or USB?)
> >
> > Or I'd suspect that the entire interrupt system has gone bust, but you're
> > still able to do sysrq.
> >
> > How are you doing sysrq, btw? Serial console? alt-F7 into a vgaconsole?
>
> alt + sysrq + key, but alt + fX doesn't work
>
> > Are you able to log in from another machine via ssh?
>
> Yes.

I mean - after the system has failed, you are still able to log in, get a
shell, run commands?

If so, that's strange, because sshd is still running.

What does `top' say in that case, when you re-run it.

Generally, have a poke around, see if you can work out what the system it
doing.

> >
> > Is the CPU idle when it hangs, or is it busy? If busy, what does sysrq-P
> > say?
> >
> >
>
> Pid: 3716, comm: firefox-bin
> EIP: 0073:[<b23bb9d1>] CPU: 0
> EIP is at 0xb23bb9d1
> ESP: 007b:afdfd1d0 EFLAGS: 00000202 Not tainted (2.6.21-rc2-mm1 #23)
> EAX: 00000001 EBX: b25ee12c ECX: 00000018 EDX: 00000018
> ESI: 0944e91c EDI: 0944e900 EBP: afdfd398 DS: 007b ES: 007b FS: 0000
> CR0: 8005003b CR2: 40954000 CR3: 32bdc000 CR4: 000006d0
> [<c0105256>] show_trace_log_lvl+0x1a/0x2f
> [<c010597b>] show_trace+0x12/0x14
> [<c0102acf>] show_regs+0x181/0x188
> [<c0261010>] sysrq_handle_showregs+0x12/0x14
> [<c0260f47>] __handle_sysrq+0x8c/0x109
> [<c0261122>] handle_sysrq+0x1f/0x21
> [<c025bd6e>] kbd_event+0x2d8/0x4ee
> [<c02bcae2>] input_event+0x420/0x442
> [<c02c01b0>] atkbd_interrupt+0x448/0x514
> [<c02b986e>] serio_interrupt+0x49/0x7f
> [<c02ba6a8>] i8042_interrupt+0x226/0x239
> [<c0155642>] handle_IRQ_event+0x1a/0x46
> [<c015675a>] handle_edge_irq+0x10a/0x14e
> [<c0106c22>] do_IRQ+0xa3/0xbd
> [<c0104c52>] common_interrupt+0x2e/0x34

That indicates that firefox is running in userspace