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    SubjectRe: 2.6.21-rc2-mm1
    From
    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.

    >
    > Are you able to log into it via ssh before it hangs and run things like
    > `top' and `watch -n1 cat /proc/interrupts', see what they do when it hangs?

    Everything stops.

    top - 10:45:55 up 19 min, 2 users, load average: 2.73, 2.51, 1.61
    Tasks: 169 total, 4 running, 165 sleeping, 0 stopped, 0 zombie
    Cpu(s): 61.2%us, 21.9%sy, 0.0%ni, 16.0%id, 0.3%wa, 0.0%hi, 0.5%si, 0.0%st
    Mem: 1985648k total, 1270908k used, 714740k free, 74424k buffers
    Swap: 4192956k total, 0k used, 4192956k free, 849936k cached

    PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
    3656 michal 15 0 293m 91m 27m S 44 4.7 5:53.77 firefox-bin
    14683 michal 25 0 22756 18m 3876 R 22 1.0 0:00.66 cc1
    3191 root 16 0 170m 20m 6640 R 21 1.0 2:26.46 Xorg
    [..]

    >
    > 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
    =======================

    Regards,
    Michal

    --
    Michal K. K. Piotrowski
    LTG - Linux Testers Group (PL)
    (http://www.stardust.webpages.pl/ltg/)
    LTG - Linux Testers Group (EN)
    (http://www.stardust.webpages.pl/linux_testers_group_en/)
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