From: Christoph Lameter <clameter@sgi.com>
To: Nick Piggin <npiggin@suse.de>
Cc: "Luck, Tony" <tony.luck@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
Andy Whitcroft <apw@shadowen.org>, Mel Gorman <mel@csn.ul.ie>
Subject: Re: [PATCH 0/7] Sparsemem Virtual Memmap V5
Date: Sat, 14 Jul 2007 08:07:43 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0707140803300.30485@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070714084931.GE1198@wotan.suse.de>
On Sat, 14 Jul 2007, Nick Piggin wrote:
> Isn't it still possible that you could have TLB pressure that would
> result in lower performance? I wonder why the large page support for
> ia64 was shelved?
16M Large memmap support was shelved because 16M is too large a size for
a vmemmap block. It results in the vmemmap overlapping multiple nodes.
The TLB pressure for the 16k support is the same since its the same
algorithm. We are measuring discontig/vmemmap 16k against sparse/vmemmap
16k here.
We would likely see a different if we would compare sparsemem vs.
sparse/vmemmap. Then there may be a difference in TLB pressure. But 16k
discontig/vmemmap is the current default on IA64.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2007-07-14 15:07 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-13 13:34 Andy Whitcroft
2007-07-13 13:35 ` [PATCH 1/7] sparsemem: clean up spelling error in comments Andy Whitcroft
2007-07-13 13:35 ` [PATCH 2/7] sparsemem: record when a section has a valid mem_map Andy Whitcroft
2007-07-13 14:24 ` [PATCH] Bah, hoisted by my own petard. Below is an updated version Andy Whitcroft
2007-07-13 13:36 ` [PATCH 3/7] Generic Virtual Memmap support for SPARSEMEM Andy Whitcroft
2007-07-13 14:51 ` KAMEZAWA Hiroyuki
2007-07-13 22:42 ` Christoph Lameter
2007-07-13 23:12 ` KAMEZAWA Hiroyuki
2007-07-13 23:17 ` Christoph Lameter
2007-07-13 23:25 ` KAMEZAWA Hiroyuki
2007-07-14 15:20 ` Christoph Hellwig
2007-07-14 16:06 ` Christoph Lameter
2007-07-14 16:33 ` Christoph Hellwig
2007-07-23 19:36 ` Christoph Lameter
2007-07-30 14:39 ` Andy Whitcroft
2007-07-30 18:35 ` Christoph Lameter
2007-07-13 13:36 ` [PATCH 4/7] x86_64: SPARSEMEM_VMEMMAP 2M page size support Andy Whitcroft
2007-07-19 23:25 ` Andrew Morton
2007-07-13 13:37 ` [PATCH 5/7] IA64: SPARSEMEM_VMEMMAP 16K " Andy Whitcroft
2007-07-13 13:37 ` [PATCH 6/7] SPARC64: SPARSEMEM_VMEMMAP support Andy Whitcroft
2007-07-13 17:00 ` Christoph Lameter
2007-07-13 13:38 ` [PATCH 7/7] ppc64: " Andy Whitcroft
2007-07-13 17:04 ` [PATCH 0/7] Sparsemem Virtual Memmap V5 Christoph Lameter
2007-07-13 17:40 ` Andrew Morton
2007-07-13 18:23 ` Christoph Lameter
2007-07-14 8:57 ` Russell King
2007-07-14 15:10 ` Christoph Lameter
2007-07-14 17:16 ` Russell King
2007-07-13 20:08 ` Roman Zippel
2007-07-13 22:02 ` Luck, Tony
2007-07-13 22:21 ` Christoph Lameter
2007-07-13 22:37 ` Luck, Tony
2007-07-13 22:54 ` Christoph Lameter
2007-07-13 23:27 ` KAMEZAWA Hiroyuki
2007-07-13 23:28 ` Christoph Lameter
2007-07-14 8:49 ` Nick Piggin
2007-07-14 15:07 ` Christoph Lameter [this message]
2007-07-13 22:43 ` David Miller, Andrew Morton
2007-07-26 8:05 ` Paul Mundt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Pine.LNX.4.64.0707140803300.30485@schroedinger.engr.sgi.com \
--to=clameter@sgi.com \
--cc=akpm@linux-foundation.org \
--cc=apw@shadowen.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mel@csn.ul.ie \
--cc=npiggin@suse.de \
--cc=tony.luck@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox