lkml.org 
[lkml]   [2007]   [Apr]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [REPORT] cfs-v4 vs sd-0.44
Date
On Tuesday 24 April 2007, Ingo Molnar wrote:
>* David Lang <david.lang@digitalinsight.com> wrote:
>> > (Btw., to protect against such mishaps in the future i have changed
>> > the SysRq-N [SysRq-Nice] implementation in my tree to not only
>> > change real-time tasks to SCHED_OTHER, but to also renice negative
>> > nice levels back to 0 - this will show up in -v6. That way you'd
>> > only have had to hit SysRq-N to get the system out of the wedge.)
>>
>> if you are trying to unwedge a system it may be a good idea to renice
>> all tasks to 0, it could be that a task at +19 is holding a lock that
>> something else is waiting for.
>
>Yeah, that's possible too, but +19 tasks are getting a small but
>guaranteed share of the CPU so eventually it ought to release it. It's
>still a possibility, but i think i'll wait for a specific incident to
>happen first, and then react to that incident :-)
>
> Ingo

In the instance I created, even the SysRq+b was ignored, and ISTR thats
supposed to initiate a reboot is it not? So it was well and truly wedged.

--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
I use technology in order to hate it more properly.
-- Nam June Paik
-
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: 2007-04-24 16:41    [W:0.161 / U:8.032 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site