From: Andi Kleen <ak@suse.de>
To: Christoph Lameter <christoph@lameter.com>
Cc: Andi Kleen <ak@suse.de>, Dave Hansen <haveblue@us.ibm.com>,
linux-mm@kvack.org
Subject: Re: [patch] CONFIG_ARCH_HAS_ATOMIC_UNSIGNED
Date: Fri, 17 Dec 2004 17:33:08 +0100 [thread overview]
Message-ID: <20041217163308.GE14229@wotan.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.58.0412170827280.17806@server.graphe.net>
On Fri, Dec 17, 2004 at 08:27:58AM -0800, Christoph Lameter wrote:
>
> On Fri, 17 Dec 2004, Andi Kleen wrote:
>
> > struct page {
> > page_flags_t flags; /* Atomic flags, some possibly
> > * updated asynchronously */
> >
> > <------------ what to do with the 4 byte padding here?
> >
>
> Put the order of the page there for compound pages instead of having that
> in index?
That would waste memory on the 64bit architectures that cannot tolerate
32bit atomic flags or on true 32bit architecture.
Also what's the problem of having it in index?
-Andi
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next prev parent reply other threads:[~2004-12-17 16:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-17 0:44 [patch] CONFIG_ARCH_HAS_ATOMIC_UNSIGNED Dave Hansen
2004-12-17 6:11 ` Andi Kleen
2004-12-17 8:42 ` Dave Hansen
2004-12-17 16:27 ` Christoph Lameter
2004-12-17 16:33 ` Andi Kleen [this message]
2004-12-17 19:26 ` Christoph Lameter
2004-12-17 19:37 ` Andi Kleen
2004-12-17 22:11 ` Christoph Lameter
2004-12-18 6:50 ` Andi Kleen
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