From: Robin Holt <holt@sgi.com>
To: Paul Jackson <pj@sgi.com>
Cc: Andi Kleen <ak@suse.de>,
linux-mm@kvack.org, akpm@osdl.org, nickpiggin@yahoo.com.au,
rientjes@google.com, mbligh@google.com, rohitseth@google.com,
menage@google.com, clameter@sgi.com
Subject: Re: [TAKE] memory page_alloc zonelist caching speedup
Date: Mon, 16 Oct 2006 06:25:36 -0500 [thread overview]
Message-ID: <20061016112535.GA13218@lnx-holt.americas.sgi.com> (raw)
In-Reply-To: <20061016032632.486f4235.pj@sgi.com>
On Mon, Oct 16, 2006 at 03:26:32AM -0700, Paul Jackson wrote:
> Andi wrote:
> > Yes but you will add latencies for cache line bounces won't you?
> > The old zone lists were completely read only. That is what worries me
> > most.
Paul, I think Andi is concerned that we will have a heavily shared
cache line which now becomes frequently invalidated. That invalidate
is quite expensive compared to just letting the lines quietly leave the
cpus cache and refetching them.
Thanks,
Robin
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next prev parent reply other threads:[~2006-10-16 11:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-10 8:14 Paul Jackson
2006-10-16 9:34 ` Andi Kleen
2006-10-16 10:26 ` Paul Jackson
2006-10-16 11:25 ` Robin Holt [this message]
2006-10-16 16:58 ` Paul Jackson
2006-10-16 18:31 ` Paul Jackson
2006-11-08 10:21 ` Paul Jackson
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