linux-kernel - Re: [PATCH] mm: Fix the TLB range flushed when __tlb_remove

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Date:	Mon, 29 Jul 2013 17:16:11 -0700
From:	Greg KH <greg@...ah.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	David Miller <davem@...emloft.net>, Vineet.Gupta1@...opsys.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org, mgorman@...e.de,
	hughd@...gle.com, riel@...hat.com, rientjes@...gle.com,
	peterz@...radead.org, linux-arch@...r.kernel.org,
	catalin.marinas@....com, jcmvbkbc@...il.com, stable@...r.kernel.org
Subject: Re: [PATCH] mm: Fix the TLB range flushed when __tlb_remove_page()
 runs out of slots

On Mon, Jul 29, 2013 at 04:46:58PM -0700, Andrew Morton wrote:
> On Mon, 29 Jul 2013 16:41:06 -0700 (PDT) David Miller <davem@...emloft.net> wrote:
> 
> > From: Vineet Gupta <Vineet.Gupta1@...opsys.com>
> > Date: Wed, 29 May 2013 18:26:13 +0530
> > 
> > > zap_pte_range loops from @addr to @end. In the middle, if it runs out of
> > > batching slots, TLB entries needs to be flushed for @start to @interim,
> > > NOT @interim to @end.
> > > 
> > > Since ARC port doesn't use page free batching I can't test it myself but
> > > this seems like the right thing to do.
> > > Observed this when working on a fix for the issue at thread:
> > > 	http://www.spinics.net/lists/linux-arch/msg21736.html
> > > 
> > > Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
> > 
> > As this bug can cause pretty serious memory corruption, I'd like to
> > see this submitted to -stable.
> 
> Greg, e6c495a96ce02574e765d5140039a64c8d4e8c9e from mainline, please.

Now applied to 3.10-stable, thanks.

greg k-h
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