linux-kernel - Re: early fixmap causes kmap breakage

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Message-ID: <20081230061344.GA28281@elte.hu>
Date:	Tue, 30 Dec 2008 07:13:44 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Nick Piggin <npiggin@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, ebiederm@...ssion.com,
	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	ijc@...lion.org.uk
Subject: Re: early fixmap causes kmap breakage


* Nick Piggin <npiggin@...e.de> wrote:

> On Mon, Dec 29, 2008 at 03:17:31PM -0800, Andrew Morton wrote:
> > On Thu, 18 Dec 2008 22:15:43 +0100
> > Nick Piggin <npiggin@...e.de> wrote:
> > 
> > > Hi,
> > > 
> > > I've debugged a problem where i386+pae systems with more than a few CPUs
> > > blow up at boot in the kmap_atomic code.
> > 
> > ping?
> 
> No further progress here, I'm waiting on input for how to fix this 
> "nicely". Meantime, clearing the early fixmap pte I guess works, but you 
> lose a page... is it possible to put it into .initdata or is there some 
> issue with that? (I guess on a PAE kernel, 4K isn't a big deal).

yeah, 4K shouldnt be a big deal. Mind sending a patch for this?

	Ingo
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