From: Alistair John Strachan <s0348365@sms.ed.ac.uk>
To: Andi Kleen <ak@suse.de>
Subject: Re: [PATCH] x86_64 stack trace cleanup
Date: Fri, 24 Feb 2006 19:25:17 +0000
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Cc: Andres Salomon <dilinger@debian.org>, linux-kernel@vger.kernel.org
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On Friday 24 February 2006 12:22, Andi Kleen wrote:
> On Friday 24 February 2006 12:29, Andres Salomon wrote:
> > That would be nice.  Unfortunately, I'm trying to figure out why my dual
> > opteron box likes to push the load up to 15 and then hang while doing
> > i/o to the 3ware 9500S-8 card.  Looks like the load/d-state processes
> > are caused by a whole lot (well, MAX_PDFLUSH_THREADS) of pdflush
> > processes spinning on base->lock in lock_timer_base(); not sure if
> > that's intentional or not, but it seems rather odd.  Whether the hanging
> > is related to the high load remains to be seen.
>
> Sounds like some timer handler is broken. You have to find out which
> one it is.
>
> > I don't see why this is a problem.  Other architectures have done this
> > for ages, without problems.  I suspect most people get their backtraces
> > from either serial console or logs, as copying them down from the screen
> > or taking a picture of the panic is a rather large pain.  It seems like
> > you're penalizing everyone for a few select use cases.
>
> People submitting jpegs of photographed oopses or even badly scribbled
> down oopses is quite common. Serial consoles are only used by a small
> elite.

I agree, I've had to report using a JPEG file on multiple occasions, because 
my mainboard has no serial ports. However, if you're using a 1280x1024 
vesafb, which is supported by most systems, you can get a lot of lines on 
screen at once..

-- 
Cheers,
Alistair.

'No sense being pessimistic, it probably wouldn't work anyway.'
Third year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.
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