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

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Message-Id: <20130729164658.0dfa1ff602bc131fe2ec0b1b@linux-foundation.org>
Date:	Mon, 29 Jul 2013 16:46:58 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Miller <davem@...emloft.net>
Cc:	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, Greg KH <greg@...ah.com>,
	stable@...r.kernel.org
Subject: Re: [PATCH] mm: Fix the TLB range flushed when __tlb_remove_page()
 runs out of slots

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.
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