From: jbarnes@sgi.com (Jesse Barnes)
To: Andrew Morton <akpm@osdl.org>
Cc: colpatch@us.ibm.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, mbligh@aracnet.com
Subject: Re: [RFC] Simplify node/zone portion of page->flags
Date: Sun, 23 Nov 2003 14:49:03 -0800 [thread overview]
Message-ID: <20031123224903.GB21617@sgi.com> (raw)
In-Reply-To: <20031123144052.1f0d5071.akpm@osdl.org>
On Sun, Nov 23, 2003 at 02:40:52PM -0800, Andrew Morton wrote:
> > zone_num. This makes it trivial to recover either the node or zone
> > number with a simple bitshift. There are many places in the kernel
> > where we do things like: page_zone(page)->zone_pgdat->node_id to
> > determine the node a page belongs to. With this patch we save several
> > pointer dereferences, and it boils down to shifting some bits.
>
> This rather conflicts with the patch from Jesse which I have. Can you guys
> work that out and let me know when you're done?
I like Matt's patch, but haven't tested it yet. I'll try it out on
Monday.
Jesse
WARNING: multiple messages have this Message-ID (diff)
From: jbarnes@sgi.com (Jesse Barnes)
To: Andrew Morton <akpm@osdl.org>
Cc: colpatch@us.ibm.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, mbligh@aracnet.com
Subject: Re: [RFC] Simplify node/zone portion of page->flags
Date: Sun, 23 Nov 2003 14:49:03 -0800 [thread overview]
Message-ID: <20031123224903.GB21617@sgi.com> (raw)
In-Reply-To: <20031123144052.1f0d5071.akpm@osdl.org>
On Sun, Nov 23, 2003 at 02:40:52PM -0800, Andrew Morton wrote:
> > zone_num. This makes it trivial to recover either the node or zone
> > number with a simple bitshift. There are many places in the kernel
> > where we do things like: page_zone(page)->zone_pgdat->node_id to
> > determine the node a page belongs to. With this patch we save several
> > pointer dereferences, and it boils down to shifting some bits.
>
> This rather conflicts with the patch from Jesse which I have. Can you guys
> work that out and let me know when you're done?
I like Matt's patch, but haven't tested it yet. I'll try it out on
Monday.
Jesse
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next prev parent reply other threads:[~2003-11-23 22:49 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-22 1:14 [RFC] Simplify node/zone portion of page->flags Matthew Dobson
2003-11-23 22:40 ` Andrew Morton
2003-11-23 22:40 ` Andrew Morton
2003-11-23 22:49 ` Jesse Barnes [this message]
2003-11-23 22:49 ` Jesse Barnes
2003-11-24 23:31 ` Jesse Barnes
2003-11-24 23:31 ` Jesse Barnes
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