From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Christoph Lameter <clameter@sgi.com>
Cc: William Lee Irwin III <wli@holomorphy.com>, linux-mm@kvack.org
Subject: Re: ZERO_PAGE refcounting causes cache line bouncing
Date: Tue, 20 Mar 2007 13:53:31 +1100 [thread overview]
Message-ID: <45FF4CAB.2000306@yahoo.com.au> (raw)
In-Reply-To: <Pine.LNX.4.64.0703191005530.23929@schroedinger.engr.sgi.com>
Christoph Lameter wrote:
> On Mon, 19 Mar 2007, Nick Piggin wrote:
>
>
>>I haven't booted this, but it is a quick forward port + some fixes and
>>simplifications.
>
>
> Eeek patch vanished.
>
> The comparison with ZERO_PAGE may fail if we have multiple zero pages.
> Would it be possible to check for PageReserved?
That still wasn't quite right either.
I don't want to check for PageReserved, because I want to get rid of
that flag one day. The Robin/Bill approach for multiple zero pages
will work, though.
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next prev parent reply other threads:[~2007-03-20 2:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-16 22:17 ZERO_PAGE refcounting causes cache line bouncing Christoph Lameter
2007-03-17 4:35 ` William Lee Irwin III
2007-03-19 5:56 ` Nick Piggin
2007-03-19 6:24 ` Nick Piggin
2007-03-19 6:41 ` Nick Piggin
2007-03-19 10:04 ` Nick Piggin
2007-03-19 17:06 ` Christoph Lameter
2007-03-20 2:53 ` Nick Piggin [this message]
2007-03-19 12:03 ` Robin Holt
2007-03-20 2:35 ` Nick Piggin
2007-03-19 12:46 ` William Lee Irwin III
2007-03-20 2:34 ` Nick Piggin
2007-03-19 17:04 ` Christoph Lameter
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