Date: Mon, 29 Jul 2013 16:41:06 -0700 (PDT)
Message-Id: <20130729.164106.943996066712571180.davem@davemloft.net>
To: Vineet.Gupta1@synopsys.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        akpm@linux-foundation.org, mgorman@suse.de, hughd@google.com,
        riel@redhat.com, rientjes@google.com, peterz@infradead.org,
        linux-arch@vger.kernel.org, catalin.marinas@arm.com,
        jcmvbkbc@gmail.com
Subject: Re: [PATCH] mm: Fix the TLB range flushed when __tlb_remove_page()
 runs out of slots
From: David Miller <davem@davemloft.net>
In-Reply-To: <1369832173-15088-1-git-send-email-vgupta@synopsys.com>
References: <1369832173-15088-1-git-send-email-vgupta@synopsys.com>
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From: Vineet Gupta <Vineet.Gupta1@synopsys.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@synopsys.com>

As this bug can cause pretty serious memory corruption, I'd like to
see this submitted to -stable.

Thanks!
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