linux-kernel - Re: [PATCH] x86: ioremap ram check fix

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Date:	Wed, 30 Apr 2008 14:17:41 -0400
From:	Andres Salomon <dilinger@...ued.net>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: ioremap ram check fix

On Wed, 30 Apr 2008 20:10:15 +0200
Ingo Molnar <mingo@...e.hu> wrote:

> 
> * Andres Salomon <dilinger@...ued.net> wrote:
> 
> > Hi Ingo,
> > 
> > bdd3cee2e4b7279457139058615ced6c2b41e7de (x86: ioremap(), extend check 
> > to all RAM pages) breaks OLPC's ioremap call.  The ioremap that OLPC 
> > uses is:
> 
> that breakage has been reported independently as well and the revert has 
> been pushed to Linus yesterday - it's not upstream yet. See this commit 
> in x86.git:
> 

Sure, either way.  FWIW, Vegard reported that the PAGE_MASK change made
the 150s delay disappear.



>  commit 1b8104a0ec138de829bb351f6597d534c7c134dc
>  Author: Ingo Molnar <mingo@...e.hu>
>  Date:   Tue Apr 29 12:04:51 2008 +0200
> 
>     revert: "x86: ioremap(), extend check to all RAM pages"
> 
>     Vegard Nossum reported a large (150 seconds) boot delay during bootup,
>     and bisected it to "x86: ioremap(), extend check to all RAM pages"
>     (commit bdd3cee2e4b). Revert this commit for now.
> 
>     Bisected-by: Vegard Nossum <vegard.nossum@...il.com>
>     Signed-off-by: Ingo Molnar <mingo@...e.hu>
> 
> 	Ingo
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