lkml.org 
[lkml]   [2007]   [Oct]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [2.6.23] tasks stuck in running state?
From
From: Chuck Ebbert <cebbert@redhat.com>
Date: Fri, 19 Oct 2007 18:18:08 -0400

> On 10/19/2007 06:03 PM, Jeff Garzik wrote:
> >> [jgarzik@pretzel misc-2.6]$ strace -p8484
> >> Process 8484 attached - interrupt to quit
> > [sits there, chewing up CPU grepping a 47-line header file]
> >
>
> And sysrq-p is pretty useless unless you can force the keyboard
> interrupt and the spinning process onto the same CPU.

Yes, I find this a painful limitation too.

Sparc64 used to dump the registers on all active cpus for show_regs()
via a cross-call, and this was incredibly useful. But I disabled that
as soon as I started playing with Niagara because at 32 cpus and
larger the output is just too voluminous to be useful.

What might be appropriate is just to get a one-line program counter
dump on every cpu via some new sysrq keystroke.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-10-20 02:03    [W:0.042 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site