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Date: Mon, 29 Oct 2001 18:15:28 -0500
From: Benjamin LaHaise <bcrl@redhat.com>
To: "David S. Miller" <davem@redhat.com>
Cc: torvalds@transmeta.com, linux-kernel@vger.kernel.org
Subject: Re: please revert bogus patch to vmscan.c
Message-ID: <20011029181527.G25434@redhat.com>
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In-Reply-To: <20011029.151422.102554141.davem@redhat.com>; from davem@redhat.com on Mon, Oct 29, 2001 at 03:14:22PM -0800
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On Mon, Oct 29, 2001 at 03:14:22PM -0800, David S. Miller wrote:
>    From: Benjamin LaHaise <bcrl@redhat.com>
>    Date: Mon, 29 Oct 2001 18:08:37 -0500
> 
>    is completely bogus.  Without the tlb flush, the system may never update 
>    the accessed bit on a page that is heavily being used.
> 
> It's intentional Ben, think about the high cost of the SMP invalidate
> when kswapd is just scanning page tables.

I think it's far more expensive to pull a page back in from disk.

		-ben
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