linux-kernel - Re: 2.6.19 file content corruption on ext3

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Date:	Mon, 18 Dec 2006 12:49:46 +0200
From:	Andrei Popa <andrei.popa@...eo.ro>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andrew Morton <akpm@...l.org>, Linus Torvalds <torvalds@...l.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Hugh Dickins <hugh@...itas.com>,
	Florian Weimer <fw@...eb.enyo.de>,
	Marc Haber <mh+linux-kernel@...schlus.de>,
	Martin Michlmayr <tbm@...ius.com>
Subject: Re: 2.6.19 file content corruption on ext3

> OK, I'll try this on a ext3 box. BTW, what data mode are you using ext3
> in?
> 

ordered

> 
> Also, for testings sake, could you give this a go:
> It's a total hack but I guess worth testing.
> 
> ---
>  mm/rmap.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux-2.6-git/mm/rmap.c
> ===================================================================
> --- linux-2.6-git.orig/mm/rmap.c	2006-12-18 11:06:29.000000000 +0100
> +++ linux-2.6-git/mm/rmap.c	2006-12-18 11:07:16.000000000 +0100
> @@ -448,7 +448,7 @@ static int page_mkclean_one(struct page 
>  		goto unlock;
>  
>  	entry = ptep_get_and_clear(mm, address, pte);
> -	entry = pte_mkclean(entry);
> +	/* entry = pte_mkclean(entry); */
>  	entry = pte_wrprotect(entry);
>  	ptep_establish(vma, address, pte, entry);
>  	lazy_mmu_prot_update(entry);
> 

with latest git and this patch there is no corruption !



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