Re: please revert bogus patch to vmscan.c

Benjamin LaHaise
2001-10-29T23:15:11Z

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