[ltp] Re: BUG: soft lockup - CPU#0 stuck for 61s!

[D. Sen]

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I can reproduce this problem deterministically. It happens every time I
try to back up to an external HDD. This is irrespective of whether the
external drive is using an USB/Firewire/eSATA interface.

I have been using the 2.6.27.10 kernel, 64 bit Mandriva, W500 Thinkpad
with an Intel Core2Duo T9600 @ 2.8 GHz system.

If no one knows the culprit, I will have to start rmmoding modules one
at a time to see if I can pin-point the module by a process of
elimination. Its going to be annoying as each unsuccessful attempt is
going to require a hard reboot...with the potential for file system
corruption.

Cheers,
DS

Pio Bättig wrote:
| Hi,
|
| I have a T61 with a T7100 (1.8 GHz) Core 2 Duo and 4 GB of memory,
| Centrino Duo chipset (Intel Graphics, Network,....)
| Since (at least) 2.6.27.5-117.fc10.x86_64 I also observe frequent lockups.
| I can work for anything between 15 minutes to several hours, and then
| suddenly, the system starts behaving jerkily (mouse pointer, loading
| applications.....).
| The CPU-applet gets stuck at 1.8 GHz. However when checking with "top",
| the CPU utilization stays at around 1-5 percent if I don't do anything
| on the system, it doesn't seem to go to 50/100 percent which could
| explain the freezing.
|
| If these lockups happen, a graceful shutdown is not possible anymore,
| the system gets stuck somewhere in the process.
| (BTW: is there a possibility to have the shutdown messages added to
| /var/log/messages or some other logfile?,  I don't see them recorded
| anywhere, only boot-messages.)
|
| This behavior starts to get quite annoying, as it happens on a daily
| basis and not occasionally. At first, I suspected the desktop-effects,
| as they gave me trouble under fedora 9, but switching them off didn't
| get rid of the lockups.
|
| Best regards,
|
| Pio
|
|
|
| Tino Keitel wrote:
| | On Sat, Feb 07, 2009 at 20:26:29 +1100, D. Sen wrote:
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| |> Anyone noticed this on their syslog? It appears whenever I am trying to
| |> backup my hard drive to an external drive (USB or ESATA). It
freezes the
| |> computer requiring a hard reboot.
| |>
| |> Very annoying. Googling results in various hits - but nothing definite.
| |
| | I saw such hangs with recent versions of the Intel driver (2.6.1) with
| | kernel mode setting enabled in the kernel.
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