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From: Peter Zijlstra <peterz@infradead.org>
To: Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>
Cc: Steven Rostedt <rostedt@goodmis.org>,
	LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>
Subject: Re: 2.6.26.6-rt11: BUGs (sleeping function called from invalid context)
Date: Fri, 07 Nov 2008 22:47:51 +0100	[thread overview]
Message-ID: <1226094472.31966.93.camel@lappy.programming.kicks-ass.net> (raw)
In-Reply-To: <1226093710.20569.23.camel@localhost.localdomain>

On Fri, 2008-11-07 at 13:35 -0800, Fernando Lopez-Lezcano wrote:
> On Fri, 2008-11-07 at 20:16 +0100, Peter Zijlstra wrote:
> > On Fri, 2008-11-07 at 14:01 -0500, Steven Rostedt wrote:
> > > Peter, I think we've seen this before. It is the highmem code sleeping.
> > 
> > I've been working on an alternative kmap_atomic implementation for -rt,
> > the below has been build and booted but not stressed, anybody care to
> > give it a spin ?
> 
> I'll give it a try. Anything in particular I should try to do? Or not
> do? Or watch for?

Lots of I/O should stress the i386 highmem stuff. If all is well it
works, if not, crashes and splats.

> -- Fernando
> 
> 
> > ---
> >  arch/x86/mm/highmem_32.c  |  130 ++++++++++++++++++++++++++++++++++++++++++---
> >  include/asm-x86/highmem.h |   11 ----
> >  include/linux/sched.h     |    5 ++
> >  kernel/sched.c            |   10 ++++
> >  4 files changed, 137 insertions(+), 19 deletions(-)
> >  [MUNCH]
> 
> 


  reply	other threads:[~2008-11-07 21:48 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-07 18:50 Fernando Lopez-Lezcano
2008-11-07 19:01 ` Steven Rostedt
2008-11-07 19:16   ` Peter Zijlstra
2008-11-07 21:35     ` Fernando Lopez-Lezcano
2008-11-07 21:47       ` Peter Zijlstra [this message]
2008-11-07 23:52         ` Fernando Lopez-Lezcano
2008-11-08  8:47           ` Peter Zijlstra
2008-11-08 18:28             ` Fernando Lopez-Lezcano
2009-01-16 20:16   ` Fernando Lopez-Lezcano
2009-01-16 20:41     ` Steven Rostedt
2009-01-16 20:49     ` Steven Rostedt
2009-01-16 23:06       ` Fernando Lopez-Lezcano
2009-01-17  0:37         ` Steven Rostedt
2009-01-19 20:36           ` Fernando Lopez-Lezcano

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