From: Andrew Morton <akpm@osdl.org>
To: "David S. Miller" <davem@davemloft.net>
Cc: linux-arch@vger.kernel.org, apw@shadowen.org,
haveblue@us.ibm.com, matthew.e.tolentino@intel.com,
bob.picco@hp.com
Subject: Re: sparsemem patches in -mm
Date: Tue, 21 Jun 2005 23:00:24 -0700 [thread overview]
Message-ID: <20050621230024.4cd8d2fd.akpm@osdl.org> (raw)
In-Reply-To: <20050621.224645.78710941.davem@davemloft.net>
"David S. Miller" <davem@davemloft.net> wrote:
>
> From: Andrew Morton <akpm@osdl.org>
> Date: Tue, 21 Jun 2005 02:13:52 -0700
>
> > http://www.zip.com.au/~akpm/linux/patches/stuff/sparsemem/
>
> The only thing that sticks out to me in this patch is that
> sparc64 uses a field starting at bit 24 in page->flags to
> determine the cpu which needs a D-cache flush for a page.
<looks>
That's a bit hacky. Doesn't it conflict with the way in which we stuff the
page's zone index into the top of page->flags? I guess with a small number
of zones and a smallish number of CPUs you got lucky.
It'd be safer to use bit 32.
> I don't think the page->flags rework makes things any different
> than before, but it's something to keep in mind.
Think so.
next prev parent reply other threads:[~2005-06-22 6:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-21 9:13 sparsemem patches in -mm Andrew Morton
2005-06-21 9:50 ` Andi Kleen
2005-06-21 10:09 ` Andrew Morton
2005-06-21 15:49 ` Andy Whitcroft
2005-06-21 15:58 ` Andi Kleen
2005-06-21 11:00 ` Bob Picco
2005-06-21 15:57 ` Dave Hansen
2005-06-21 16:45 ` Bob Picco
2005-06-21 14:17 ` Matthew Wilcox
2005-06-21 15:51 ` Andy Whitcroft
2005-06-21 20:01 ` Andrew Morton
2005-06-21 23:39 ` Dave Hansen
2005-06-22 5:46 ` David S. Miller
2005-06-22 6:00 ` Andrew Morton [this message]
2005-07-27 22:42 ` David S. Miller
2005-06-23 22:48 ` Roman Zippel
2005-06-23 22:56 ` Dave Hansen
2005-06-23 23:53 ` Roman Zippel
-- strict thread matches above, loose matches on Subject: below --
2005-06-21 15:52 Luck, Tony
2005-06-21 15:58 ` Andy Whitcroft
2005-06-21 16:09 Luck, Tony
2005-06-21 16:17 ` Dave Hansen
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