Home » Mailing list archives » linux-kernel » 2007 » December » 3

Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: Andi Kleen
Subject: Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks
Date: Monday, December 3, 2007 - 7:14 am

> It's more like "lets warn about it and fix the problems when we find

It is already known there are lots of problems. I won't repeat
them because I already wrote too much about them. Feel free
to read back in the thread.

Now if all the known problems are fixed and only some hard to know
hidden ones remain it might make sense to enable (but even then
a little dubious considering how important error handling robustness
is), but not at the current state (at least with the full default
backtraces) 


lockdep is clearly a "only enable if you're developing the kernel" 
feature (just alone because of its overhead and other problems).
So side effects etc. are expected.

Softlockup previously (before this patch) was a "can be always safely 
enabled" feature.  

Now Ingo's latest unreleased version with single
line messages might be actually ok if he turns off the backtraces
by default. Unfortunately I wasn't able to find out so far if he 
has done that or not, he always cuts away these parts of the emails.

-Andi

--
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
[feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks, Ingo Molnar, (Sat Dec 1, 2:20 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., David Rientjes, (Sat Dec 1, 11:31 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Sat Dec 1, 11:33 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Oeser, (Sat Dec 1, 5:54 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Sun Dec 2, 1:58 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., David Rientjes, (Sun Dec 2, 8:52 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Sun Dec 2, 11:57 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Sun Dec 2, 11:59 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Arjan van de Ven, (Sun Dec 2, 12:41 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Sun Dec 2, 1:08 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Sun Dec 2, 1:26 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Sun Dec 2, 1:47 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Sun Dec 2, 2:10 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Sun Dec 2, 2:19 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Sun Dec 2, 2:24 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Sun Dec 2, 2:34 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Arjan van de Ven, (Sun Dec 2, 3:18 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Sun Dec 2, 3:20 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Arjan van de Ven, (Sun Dec 2, 3:43 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Sun Dec 2, 5:00 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Sun Dec 2, 5:07 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Arjan van de Ven, (Sun Dec 2, 5:59 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Mon Dec 3, 2:55 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Radoslaw Szkodzinski, (Mon Dec 3, 3:15 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 3:23 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Mon Dec 3, 3:27 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 3:38 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Mon Dec 3, 4:04 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 4:59 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Mon Dec 3, 5:13 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 5:28 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Mon Dec 3, 5:41 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 6:00 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Mon Dec 3, 6:14 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Pekka Enberg, (Mon Dec 3, 6:50 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 6:57 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Mon Dec 3, 7:14 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 7:19 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Arjan van de Ven, (Mon Dec 3, 8:23 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andi Kleen, (Mon Dec 3, 9:36 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Andrew Morton, (Mon Dec 3, 10:57 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Rafael J. Wysocki, (Mon Dec 3, 11:28 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 12:24 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Rafael J. Wysocki, (Mon Dec 3, 3:47 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Ingo Molnar, (Mon Dec 3, 5:05 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIB ..., Mark Lord, (Wed Dec 5, 3:31 pm)