From: Rik van Riel <riel@redhat.com>
To: Nick Piggin <npiggin@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, lee.schermerhorn@hp.com,
kosaki.motohiro@jp.fujitsu.com, linux-mm@kvack.org,
eric.whitney@hp.com
Subject: Re: [PATCH -mm 17/25] Mlocked Pages are non-reclaimable
Date: Tue, 10 Jun 2008 08:50:11 -0400 [thread overview]
Message-ID: <20080610085011.15bd481e@bree.surriel.com> (raw)
In-Reply-To: <20080610033130.GK19404@wotan.suse.de>
On Tue, 10 Jun 2008 05:31:30 +0200
Nick Piggin <npiggin@suse.de> wrote:
> It should definitely be enabled for 32-bit machines, and enabled by default.
> The argument is that 32 bit machines won't have much memory so it won't
> be a problem, but a) it also has to work well on other machines without
> much memory, and b) it is a nightmare to have significant behaviour changes
> like this. For kernel development as well as kernel running.
>
> If we eventually run out of page flags on 32 bit, then sure this might be
> one we could look at geting rid of. Once the code has proven itself.
Alternatively, we tell the 32 bit people not to compile their kernel
with support for 64 NUMA nodes :)
The number of page flags on 32 bits is (32 - ZONE_SHIFT - NODE_SHIFT)
after Christoph's cleanup and no longer a fixed number.
Does anyone compile a 32 bit kernel with a large (ZONE_SHIFT + NODE_SHIFT)?
--
All rights reversed.
next prev parent reply other threads:[~2008-06-10 12:50 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-06 20:28 [PATCH -mm 00/25] VM pageout scalability improvements (V10) Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 01/25] move isolate_lru_page() to vmscan.c Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 02/25] Use an indexed array for LRU variables Rik van Riel, Rik van Riel
2008-06-07 1:04 ` Andrew Morton
2008-06-07 5:43 ` KOSAKI Motohiro
2008-06-07 14:47 ` Rik van Riel
2008-06-08 11:22 ` KOSAKI Motohiro
2008-06-07 18:42 ` Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 03/25] use an array for the LRU pagevecs Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 04/25] free swap space on swap-in/activation Rik van Riel, Rik van Riel
2008-06-07 1:04 ` Andrew Morton
2008-06-07 19:56 ` Rik van Riel
2008-06-09 2:14 ` MinChan Kim
2008-06-09 2:42 ` Rik van Riel
2008-06-09 13:38 ` KOSAKI Motohiro
2008-06-10 2:30 ` MinChan Kim
2008-06-06 20:28 ` [PATCH -mm 05/25] define page_file_cache() function Rik van Riel, Rik van Riel
2008-06-07 1:04 ` Andrew Morton
2008-06-07 23:38 ` Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 06/25] split LRU lists into anon & file sets Rik van Riel, Rik van Riel
2008-06-07 1:04 ` Andrew Morton
2008-06-07 1:22 ` Rik van Riel
2008-06-07 1:52 ` Andrew Morton
2008-06-06 20:28 ` [PATCH -mm 07/25] second chance replacement for anonymous pages Rik van Riel, Rik van Riel
2008-06-07 1:04 ` Andrew Morton
2008-06-07 6:03 ` KOSAKI Motohiro
2008-06-07 6:43 ` Andrew Morton
2008-06-08 15:04 ` Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 08/25] add some sanity checks to get_scan_ratio Rik van Riel, Rik van Riel
2008-06-07 1:04 ` Andrew Morton
2008-06-08 15:11 ` Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 09/25] fix pagecache reclaim referenced bit check Rik van Riel, Rik van Riel
2008-06-07 1:04 ` Andrew Morton
2008-06-07 1:08 ` Rik van Riel
2008-06-08 10:02 ` Peter Zijlstra
2008-06-06 20:28 ` [PATCH -mm 10/25] add newly swapped in pages to the inactive list Rik van Riel, Rik van Riel
2008-06-07 1:04 ` Andrew Morton
2008-06-06 20:28 ` [PATCH -mm 11/25] more aggressively use lumpy reclaim Rik van Riel, Rik van Riel
2008-06-07 1:05 ` Andrew Morton
2008-06-06 20:28 ` [PATCH -mm 12/25] pageflag helpers for configed-out flags Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 13/25] Noreclaim LRU Infrastructure Rik van Riel, Rik van Riel
2008-06-07 1:05 ` Andrew Morton
2008-06-08 20:34 ` Rik van Riel
2008-06-08 20:57 ` Andrew Morton
2008-06-08 21:32 ` Rik van Riel
2008-06-08 21:43 ` Ray Lee
2008-06-08 23:22 ` Andrew Morton
2008-06-08 23:34 ` Rik van Riel
2008-06-08 23:54 ` Andrew Morton
2008-06-09 0:56 ` Rik van Riel
2008-06-09 6:10 ` Andrew Morton
2008-06-09 13:44 ` Rik van Riel
2008-06-09 2:58 ` Rik van Riel
2008-06-09 5:44 ` Andrew Morton
2008-06-10 19:17 ` Christoph Lameter
2008-06-10 19:37 ` Rik van Riel
2008-06-10 21:33 ` Andrew Morton
2008-06-10 21:48 ` Andi Kleen
2008-06-10 22:05 ` Dave Hansen
2008-06-11 5:09 ` Paul Mundt
2008-06-11 6:16 ` Andrew Morton
2008-06-11 6:29 ` Paul Mundt
2008-06-11 12:06 ` Andi Kleen
2008-06-11 14:09 ` Removing node flags from page->flags was Re: [PATCH -mm 13/25] Noreclaim LRU Infrastructure II Andi Kleen
2008-06-11 19:03 ` [PATCH -mm 13/25] Noreclaim LRU Infrastructure Andy Whitcroft
2008-06-11 20:52 ` Andi Kleen
2008-06-11 23:25 ` Christoph Lameter
2008-06-08 22:03 ` Rik van Riel
2008-06-08 21:07 ` KOSAKI Motohiro
2008-06-10 20:09 ` Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 14/25] Noreclaim LRU Page Statistics Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 15/25] Ramfs and Ram Disk pages are non-reclaimable Rik van Riel, Rik van Riel
2008-06-07 1:05 ` Andrew Morton
2008-06-08 4:32 ` Greg KH
2008-06-06 20:28 ` [PATCH -mm 16/25] SHM_LOCKED " Rik van Riel, Rik van Riel
2008-06-07 1:05 ` Andrew Morton
2008-06-07 5:21 ` KOSAKI Motohiro
2008-06-10 21:03 ` Rik van Riel
2008-06-10 21:22 ` Lee Schermerhorn
2008-06-10 21:49 ` Andrew Morton
2008-06-06 20:28 ` [PATCH -mm 17/25] Mlocked Pages " Rik van Riel, Rik van Riel
2008-06-07 1:07 ` Andrew Morton
2008-06-07 5:38 ` KOSAKI Motohiro
2008-06-10 3:31 ` Nick Piggin
2008-06-10 12:50 ` Rik van Riel [this message]
2008-06-10 21:14 ` Rik van Riel
2008-06-10 21:43 ` Lee Schermerhorn
2008-06-10 21:57 ` Andrew Morton
2008-06-11 16:01 ` Lee Schermerhorn
2008-06-10 23:48 ` Rik van Riel
2008-06-11 15:29 ` Lee Schermerhorn
2008-06-11 1:00 ` Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 18/25] Downgrade mmap sem while populating mlocked regions Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 19/25] Handle mlocked pages during map, remap, unmap Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 20/25] Mlocked Pages statistics Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 21/25] Cull non-reclaimable pages in fault path Rik van Riel, Rik van Riel
2008-06-06 20:29 ` [PATCH -mm 22/25] Noreclaim and Mlocked pages vm events Rik van Riel, Rik van Riel
2008-06-06 20:29 ` [PATCH -mm 23/25] Noreclaim LRU scan sysctl Rik van Riel, Rik van Riel
2008-06-06 20:29 ` [PATCH -mm 24/25] Mlocked Pages: count attempts to free mlocked page Rik van Riel, Rik van Riel
2008-06-06 20:29 ` [PATCH -mm 25/25] Noreclaim LRU and Mlocked Pages Documentation Rik van Riel, Rik van Riel
2008-06-06 21:02 ` [PATCH -mm 00/25] VM pageout scalability improvements (V10) Andrew Morton
2008-06-06 21:08 ` Rik van Riel
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