From: Andrew Morton <akpm@osdl.org>
To: Paul Jackson <pj@sgi.com>
Cc: linux-mm@kvack.org, Nick Piggin <nickpiggin@yahoo.com.au>,
David Rientjes <rientjes@google.com>, Andi Kleen <ak@suse.de>,
mbligh@google.com, rohitseth@google.com, menage@google.com,
Christoph Lameter <clameter@sgi.com>
Subject: Re: [RFC] memory page_alloc zonelist caching speedup
Date: Mon, 9 Oct 2006 11:12:03 -0700 [thread overview]
Message-ID: <20061009111203.5dba9cbe.akpm@osdl.org> (raw)
In-Reply-To: <20061009105457.14408.859.sendpatchset@jackhammer.engr.sgi.com>
On Mon, 09 Oct 2006 03:54:57 -0700
Paul Jackson <pj@sgi.com> wrote:
> Optimize the critical zonelist scanning for free pages in the kernel
> memory allocator by caching the zones that were found to be full
> recently, and skipping them.
This doesn't exactly simplify the kernel, but the benchmark numbers
are nice.
I worry about the one-second-expiry thing. Wall time is a pretty
meaningless thing in the context of the page allocator and it doesn't seem
appropriate to use it. A more appropriate measure of "time" in this
context would be number-of-pages-allocated.
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next prev parent reply other threads:[~2006-10-09 18:12 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-09 10:54 [RFC] memory page alloc minor cleanups Paul Jackson, Paul Jackson
2006-10-09 10:54 ` [RFC] memory page_alloc zonelist caching speedup Paul Jackson
2006-10-09 18:12 ` Andrew Morton [this message]
2006-10-09 22:02 ` Paul Jackson
2006-10-10 4:51 ` Paul Jackson
2006-10-10 6:34 ` David Rientjes
2006-10-10 7:03 ` Paul Jackson
2006-10-10 17:07 ` Christoph Lameter
2006-10-10 19:35 ` Paul Jackson
2006-10-10 6:45 ` Paul Jackson
2006-10-09 11:08 ` [RFC] memory page alloc minor cleanups Christoph Lameter
2006-10-09 11:50 ` Paul Jackson
2006-10-09 17:12 ` Christoph Lameter
2006-10-09 13:11 ` Nick Piggin
2006-10-09 20:24 ` Paul Jackson
2006-10-10 1:45 ` Paul Jackson
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