linux-kernel - Re: [tip:x86/irq] x86: Always use irq stacks

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Date:	Tue, 7 Sep 2010 06:55:53 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Alexander van Heukelum <heukelum@...tmail.fm>
Cc:	mingo@...hat.com, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org, hch@....de,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/irq] x86: Always use irq stacks


* Alexander van Heukelum <heukelum@...tmail.fm> wrote:

> On Fri, 03 Sep 2010 17:00 +0200, "Ingo Molnar" <mingo@...e.hu> wrote:
> > 
> > * tip-bot for Christoph Hellwig <hch@....de> wrote:
> > 
> > > Commit-ID:  7974891db234467eaf1fec613ec0129cb4ac2332
> > > Gitweb:     http://git.kernel.org/tip/7974891db234467eaf1fec613ec0129cb4ac2332
> > > Author:     Christoph Hellwig <hch@....de>
> > > AuthorDate: Mon, 28 Jun 2010 14:15:54 +0200
> > > Committer:  Thomas Gleixner <tglx@...utronix.de>
> > > CommitDate: Tue, 29 Jun 2010 12:12:59 +0200
> > > 
> > > x86: Always use irq stacks
> >
> > [...]
> > 
> > Checking out 7974891db2 and building+booting a kernel with this config 
> > causes shows the crash.
> > 
> > Checking out 7974891db2~1 and building+booting a kernel with this config 
> > gives a working system.
> > 
> > Note that tip:x86/irq has these commits currently:
> > 
> >  1813a68: x86: Move alloc_desk_mask variables inside ifdef
> >  2589737: x86-32: Align IRQ stacks properly
> >  dcfa726: x86: Remove CONFIG_4KSTACKS
> >  7974891: x86: Always use irq stacks
> 
> Hello Ingo, Christoph, ...
> 
> There is still a problem with the alignment of the irq stacks. Maybe it's only
> theoretical, but I think the attached patch is necessary. (Attached because
> I'm sending it via a web interface.)
> 
> Please test and apply :).

This apparently solved the crash, thanks a lot Alexander!

	Ingo
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