From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, mel@csn.ul.ie,
clameter@sgi.com, riel@redhat.com, balbir@linux.vnet.ibm.com,
andrea@suse.de, eric.whitney@hp.com, npiggin@suse.de,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH/RFC 0/14] Page Reclaim Scalability
Date: Fri, 14 Sep 2007 23:11:03 +0200 [thread overview]
Message-ID: <1189804264.5826.5.camel@lappy> (raw)
In-Reply-To: <20070914205359.6536.98017.sendpatchset@localhost>
On Fri, 2007-09-14 at 16:53 -0400, Lee Schermerhorn wrote:
> 1) make-anon_vma-lock-rw
> 2) make-i_mmap_lock-rw
>
> The first two patches are not part of the noreclaim infrastructure.
> Rather, these patches improve parallelism in shrink_page_list()--
> specifically in page_referenced() and try_to_unmap()--by making the
> anon_vma lock and the i_mmap_lock reader/writer spinlocks.
Also at Cambridge, Linus said that rw-spinlocks are usually a mistake.
Their spinning nature can cause a lot of cacheline bouncing. If it turns
out these locks still benefit, it might make sense to just turn them
into sleeping locks.
That said, even sleeping rw locks have issues on large boxen, but they
sure give a little more breathing room than mutal exclusive locks.
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next prev parent reply other threads:[~2007-09-14 21:11 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-14 20:53 [PATCH/RFC 0/14] Page Reclaim Scalability Lee Schermerhorn
2007-09-14 20:54 ` [PATCH/RFC 1/14] Reclaim Scalability: Convert anon_vma lock to read/write lock Lee Schermerhorn
2007-09-17 11:02 ` Mel Gorman
2007-09-18 2:41 ` KAMEZAWA Hiroyuki
2007-09-18 11:01 ` Mel Gorman
2007-09-18 14:57 ` Rik van Riel
2007-09-18 15:37 ` Lee Schermerhorn
2007-09-18 20:17 ` Lee Schermerhorn
2007-09-20 10:19 ` Mel Gorman
2007-09-14 20:54 ` [PATCH/RFC 2/14] Reclaim Scalability: convert inode i_mmap_lock to reader/writer lock Lee Schermerhorn
2007-09-17 12:53 ` Mel Gorman
2007-09-20 1:24 ` Andrea Arcangeli
2007-09-20 14:10 ` Lee Schermerhorn
2007-09-20 14:16 ` Andrea Arcangeli
2007-09-14 20:54 ` [PATCH/RFC 3/14] Reclaim Scalability: move isolate_lru_page() to vmscan.c Lee Schermerhorn
2007-09-14 21:34 ` Peter Zijlstra
2007-09-15 1:55 ` Rik van Riel
2007-09-17 14:11 ` Lee Schermerhorn
2007-09-17 9:20 ` Balbir Singh
2007-09-17 19:19 ` Lee Schermerhorn
2007-09-14 20:54 ` [PATCH/RFC 4/14] Reclaim Scalability: Define page_anon() function Lee Schermerhorn
2007-09-15 2:00 ` Rik van Riel
2007-09-17 13:19 ` Mel Gorman
2007-09-18 1:58 ` KAMEZAWA Hiroyuki
2007-09-18 2:27 ` Rik van Riel
2007-09-18 2:40 ` KAMEZAWA Hiroyuki
2007-09-18 15:04 ` Lee Schermerhorn
2007-09-18 19:41 ` Christoph Lameter
2007-09-19 0:30 ` KAMEZAWA Hiroyuki
2007-09-19 16:58 ` Lee Schermerhorn
2007-09-20 0:56 ` KAMEZAWA Hiroyuki
2007-09-14 20:54 ` [PATCH/RFC 5/14] Reclaim Scalability: Use an indexed array for LRU variables Lee Schermerhorn
2007-09-17 13:40 ` Mel Gorman
2007-09-17 14:17 ` Lee Schermerhorn
2007-09-17 14:39 ` Lee Schermerhorn
2007-09-17 18:58 ` Balbir Singh
2007-09-17 19:12 ` Lee Schermerhorn
2007-09-17 19:36 ` Balbir Singh
2007-09-17 19:36 ` Rik van Riel
2007-09-17 20:21 ` Balbir Singh
2007-09-17 21:01 ` Rik van Riel
2007-09-14 20:54 ` [PATCH/RFC 6/14] Reclaim Scalability: "No Reclaim LRU Infrastructure" Lee Schermerhorn
2007-09-14 22:47 ` Christoph Lameter
2007-09-17 15:17 ` Lee Schermerhorn
2007-09-17 18:41 ` Christoph Lameter
2007-09-18 9:54 ` Mel Gorman
2007-09-18 19:45 ` Christoph Lameter
2007-09-19 11:11 ` Mel Gorman
2007-09-19 18:03 ` Christoph Lameter
2007-09-19 6:00 ` Balbir Singh
2007-09-19 14:47 ` Lee Schermerhorn
2007-09-14 20:54 ` [PATCH/RFC 7/14] Reclaim Scalability: Non-reclaimable page statistics Lee Schermerhorn
2007-09-17 1:56 ` Rik van Riel
2007-09-14 20:54 ` [PATCH/RFC 8/14] Reclaim Scalability: Ram Disk Pages are non-reclaimable Lee Schermerhorn
2007-09-17 1:57 ` Rik van Riel
2007-09-17 14:40 ` Lee Schermerhorn
2007-09-17 18:42 ` Christoph Lameter
2007-09-14 20:54 ` [PATCH/RFC 9/14] Reclaim Scalability: SHM_LOCKED pages are nonreclaimable Lee Schermerhorn
2007-09-17 2:18 ` Rik van Riel
2007-09-14 20:55 ` [PATCH/RFC 10/14] Reclaim Scalability: track anon_vma "related vmas" Lee Schermerhorn
2007-09-17 2:52 ` Rik van Riel
2007-09-17 15:52 ` Lee Schermerhorn
2007-09-14 20:55 ` [PATCH/RFC 11/14] Reclaim Scalability: swap backed pages are nonreclaimable when no swap space available Lee Schermerhorn
2007-09-17 2:53 ` Rik van Riel
2007-09-18 17:46 ` Lee Schermerhorn
2007-09-18 20:01 ` Rik van Riel
2007-09-19 14:55 ` Lee Schermerhorn
2007-09-18 2:59 ` KAMEZAWA Hiroyuki
2007-09-18 15:47 ` Lee Schermerhorn
2007-09-14 20:55 ` [PATCH/RFC 12/14] Reclaim Scalability: Non-reclaimable Mlock'ed pages Lee Schermerhorn
2007-09-14 20:55 ` [PATCH/RFC 13/14] Reclaim Scalability: Handle Mlock'ed pages during map/unmap and truncate Lee Schermerhorn
2007-09-14 20:55 ` [PATCH/RFC 14/14] Reclaim Scalability: cull non-reclaimable anon pages in fault path Lee Schermerhorn
2007-09-14 21:11 ` Peter Zijlstra [this message]
2007-09-14 21:42 ` [PATCH/RFC 0/14] Page Reclaim Scalability Linus Torvalds
2007-09-14 22:02 ` Peter Zijlstra
2007-09-15 0:07 ` Linus Torvalds
2007-09-17 6:44 ` Balbir Singh
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