From: Dave Hansen <haveblue@us.ibm.com>
To: Zoltan.Menyhart@bull.net
Cc: linux-ia64@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Migrate pages from a ccNUMA node to another - patch
Date: Tue, 30 Mar 2004 15:18:05 +0000 [thread overview]
Message-ID: <1080659885.3646.2106.camel@nighthawk> (raw)
In-Reply-To: <40695C68.4A5F551E@nospam.org>
On Tue, 2004-03-30 at 03:39, Zoltan Menyhart wrote:
> Dave Hansen wrote:
> >
> > Have you considered any common ground your patch might share with the
> > people doing memory hotplug?
>
> Comparing my stuff to their work, I just do some small performance enhancements:
>
> - I do not modify a single line on the existing VM paths - if my stuff has no
> improvement for you, then yo will not be obliged to pay any overhead
...
> - I handle only the simplest case: private anonymous pages (...a singe PTE...)
By not modifying a single line in the existing VM path, your patch
simply duplicates functionality from that existing code, which I'm not
sure is any better.
I think there's a lot of commonality with what the swap code, NUMA page
migration, and memory removal have to do. However, none of them share
any code today. I think all of the implementations could benefit from
making them a bit more generic.
-- Dave
WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <haveblue@us.ibm.com>
To: Zoltan.Menyhart@bull.net
Cc: linux-ia64@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Migrate pages from a ccNUMA node to another - patch
Date: Tue, 30 Mar 2004 07:18:05 -0800 [thread overview]
Message-ID: <1080659885.3646.2106.camel@nighthawk> (raw)
In-Reply-To: <40695C68.4A5F551E@nospam.org>
On Tue, 2004-03-30 at 03:39, Zoltan Menyhart wrote:
> Dave Hansen wrote:
> >
> > Have you considered any common ground your patch might share with the
> > people doing memory hotplug?
>
> Comparing my stuff to their work, I just do some small performance enhancements:
>
> - I do not modify a single line on the existing VM paths - if my stuff has no
> improvement for you, then yo will not be obliged to pay any overhead
...
> - I handle only the simplest case: private anonymous pages (...a singe PTE...)
By not modifying a single line in the existing VM path, your patch
simply duplicates functionality from that existing code, which I'm not
sure is any better.
I think there's a lot of commonality with what the swap code, NUMA page
migration, and memory removal have to do. However, none of them share
any code today. I think all of the implementations could benefit from
making them a bit more generic.
-- Dave
next prev parent reply other threads:[~2004-03-30 15:18 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-26 9:02 Migrate pages from a ccNUMA node to another Zoltan Menyhart
2004-03-26 9:02 ` Zoltan Menyhart
2004-03-26 10:39 ` Robin Holt
2004-03-26 10:39 ` Robin Holt
2004-03-26 7:10 ` Andi Kleen
2004-03-26 7:10 ` Andi Kleen
2004-03-26 9:18 ` Migrate pages from a ccNUMA node to another - patch Zoltan Menyhart
2004-03-26 9:18 ` Zoltan Menyhart
2004-03-26 17:20 ` Dave Hansen
2004-03-26 17:20 ` Dave Hansen
2004-03-30 8:27 ` IWAMOTO Toshihiro
2004-03-30 8:27 ` IWAMOTO Toshihiro
2004-03-30 9:05 ` Hirokazu Takahashi
2004-03-30 9:05 ` Hirokazu Takahashi
2004-03-30 11:20 ` Zoltan Menyhart
2004-03-30 11:20 ` Zoltan Menyhart
2004-03-30 12:08 ` Hirokazu Takahashi
2004-03-30 12:08 ` Hirokazu Takahashi
2004-03-30 14:32 ` Zoltan Menyhart
2004-03-30 14:32 ` Zoltan Menyhart
2004-04-03 2:58 ` Hirokazu Takahashi
2004-04-03 2:58 ` Hirokazu Takahashi
2004-04-05 15:07 ` Zoltan Menyhart
2004-04-05 15:07 ` Zoltan Menyhart
2004-04-05 15:40 ` Dave Hansen
2004-04-05 15:40 ` Dave Hansen
2004-04-06 14:42 ` Migrate pages from a ccNUMA node to another Zoltan Menyhart
2004-04-06 14:42 ` Zoltan Menyhart
2004-04-08 13:32 ` Migrate pages from a ccNUMA node to another - patch Hirokazu Takahashi
2004-04-08 13:32 ` Hirokazu Takahashi
2004-03-30 11:39 ` Zoltan Menyhart
2004-03-30 11:39 ` Zoltan Menyhart
2004-03-30 15:18 ` Dave Hansen [this message]
2004-03-30 15:18 ` Dave Hansen
2004-03-30 15:58 ` Dave Hansen
2004-03-30 15:58 ` Dave Hansen
2004-03-30 16:37 ` Dave Hansen
2004-03-30 16:37 ` Dave Hansen
2004-04-01 8:44 ` Migrate pages from a ccNUMA node to another Zoltan Menyhart
2004-04-01 8:44 ` Zoltan Menyhart
2004-03-26 12:38 ` Zoltan Menyhart
2004-03-26 12:38 ` Zoltan Menyhart
2004-03-29 23:16 ` Erich Focht
2004-03-29 23:16 ` Erich Focht
2004-03-30 9:57 ` Zoltan Menyhart
2004-03-30 9:57 ` Zoltan Menyhart
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