From: Rik van Riel <riel@redhat.com>
To: balbir@linux.vnet.ibm.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
lee.schermerhorn@hp.com
Subject: Re: [patch 00/20] VM pageout scalability improvements
Date: Sun, 23 Dec 2007 20:11:49 -0500 [thread overview]
Message-ID: <20071223201149.7b88888f@bree.surriel.com> (raw)
In-Reply-To: <476EE858.202@linux.vnet.ibm.com>
On Mon, 24 Dec 2007 04:29:36 +0530
Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
> Rik van Riel wrote:
> > In the real world, users with large JVMs on their servers, which
> > sometimes go a little into swap, can trigger this system. All of
> > the CPUs end up scanning the active list, and all pages have the
> > referenced bit set. Even if the system eventually recovers, it
> > might as well have been dead.
> >
> > Going into swap a little should only take a little bit of time.
>
> Very fascinating, so we need to scale better with larger memory.
> I suspect part of the answer will lie with using large/huge pages.
Linus vetoed going to a larger soft page size, with good reason.
Just look at how much the 64kB page size on PPC64 sucks for most
workloads - it works for PPC64 because people buy PPC64 monster
systems for the kinds of monster workloads that work well with a
large page size, but it definately isn't general purpose.
--
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:[~2007-12-24 1:11 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-18 21:15 [patch 00/20] VM pageout scalability improvements Rik van Riel
2007-12-18 21:15 ` [patch 01/20] convert anon_vma list lock a read/write lock Rik van Riel
2007-12-20 7:07 ` Christoph Lameter
2007-12-18 21:15 ` [patch 02/20] make the inode i_mmap_lock a reader/writer lock Rik van Riel
2007-12-19 0:48 ` Nick Piggin
2007-12-19 4:09 ` KOSAKI Motohiro
2007-12-19 15:52 ` Lee Schermerhorn
2007-12-19 16:31 ` Rik van Riel
2007-12-19 16:53 ` Lee Schermerhorn
2007-12-19 19:28 ` Peter Zijlstra
2007-12-19 23:40 ` Nick Piggin
2007-12-20 7:04 ` Christoph Lameter
2007-12-20 7:59 ` Nick Piggin
2008-01-02 23:35 ` Mike Travis
2008-01-03 6:07 ` Nick Piggin
2008-01-03 8:55 ` Ingo Molnar
2008-01-07 9:01 ` Nick Piggin
2007-12-18 21:15 ` [patch 03/20] move isolate_lru_page() to vmscan.c Rik van Riel
2007-12-20 7:08 ` Christoph Lameter
2007-12-18 21:15 ` [patch 04/20] free swap space on swap-in/activation Rik van Riel
2007-12-18 21:15 ` [patch 05/20] define page_file_cache() function Rik van Riel
2007-12-18 21:15 ` [patch 06/20] debugging checks for page_file_cache() Rik van Riel
2007-12-18 21:15 ` [patch 07/20] Use an indexed array for LRU variables Rik van Riel
2007-12-18 21:15 ` [patch 08/20] split LRU lists into anon & file sets Rik van Riel
2007-12-18 21:15 ` [patch 09/20] split anon & file LRUs for memcontrol code Rik van Riel
2007-12-18 21:15 ` [patch 10/20] SEQ replacement for anonymous pages Rik van Riel
2007-12-19 5:17 ` KOSAKI Motohiro
2007-12-19 13:40 ` Rik van Riel
2007-12-20 2:04 ` KOSAKI Motohiro
2007-12-18 21:15 ` [patch 11/20] add newly swapped in pages to the inactive list Rik van Riel
2007-12-18 21:15 ` [patch 12/20] No Reclaim LRU Infrastructure Rik van Riel
2007-12-18 21:15 ` [patch 13/20] Non-reclaimable page statistics Rik van Riel
2007-12-18 21:15 ` [patch 14/20] Scan noreclaim list for reclaimable pages Rik van Riel
2007-12-18 21:15 ` [patch 15/20] ramfs pages are non-reclaimable Rik van Riel
2007-12-18 21:15 ` [patch 16/20] SHM_LOCKED pages are nonreclaimable Rik van Riel
2007-12-18 21:15 ` [patch 17/20] non-reclaimable mlocked pages Rik van Riel
2007-12-19 0:56 ` Nick Piggin
2007-12-19 13:45 ` Rik van Riel
2007-12-19 14:24 ` Peter Zijlstra
2007-12-19 14:53 ` Rik van Riel
2007-12-19 16:08 ` Lee Schermerhorn
2007-12-19 16:04 ` Lee Schermerhorn
2007-12-20 20:56 ` Rik van Riel
2007-12-21 10:52 ` Nick Piggin
2007-12-21 14:17 ` Rik van Riel
2007-12-23 12:22 ` Nick Piggin
2007-12-24 1:00 ` Rik van Riel
2007-12-19 23:34 ` Nick Piggin
2007-12-20 7:19 ` Christoph Lameter
2007-12-20 15:33 ` Rik van Riel
2007-12-21 17:13 ` Lee Schermerhorn
2007-12-18 21:15 ` [patch 18/20] mlock vma pages under mmap_sem held for read Rik van Riel
2007-12-18 21:15 ` [patch 19/20] handle mlocked pages during map/unmap and truncate Rik van Riel
2007-12-18 21:15 ` [patch 20/20] account mlocked pages Rik van Riel
2007-12-22 20:27 ` [patch 00/20] VM pageout scalability improvements Balbir Singh
2007-12-23 0:21 ` Rik van Riel
2007-12-23 22:59 ` Balbir Singh
2007-12-24 1:11 ` Rik van Riel [this message]
2007-12-28 3:20 ` Matt Mackall
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=20071223201149.7b88888f@bree.surriel.com \
--to=riel@redhat.com \
--cc=balbir@linux.vnet.ibm.com \
--cc=lee.schermerhorn@hp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
/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;
as well as URLs for NNTP newsgroup(s).