From: Marc Singer <elf@buici.com>
To: Andrew Morton <akpm@osdl.org>
Cc: William Lee Irwin III <wli@holomorphy.com>,
elf@buici.com, linux-kernel@vger.kernel.org
Subject: Re: vmscan.c heuristic adjustment for smaller systems
Date: Sat, 17 Apr 2004 22:38:57 -0700 [thread overview]
Message-ID: <20040418053857.GC19595@flea> (raw)
In-Reply-To: <20040417205338.71bed81b.akpm@osdl.org>
On Sat, Apr 17, 2004 at 08:53:38PM -0700, Andrew Morton wrote:
> William Lee Irwin III <wli@holomorphy.com> wrote:
> >
> > On Sat, Apr 17, 2004 at 04:51:51PM -0700, Andrew Morton wrote:
> > > I'd assume that setting swappiness to zero simply means that you still have
> > > all of your libc in pagecache when running ls.
> > > What happens if you do the big file copy, then run `sync', then do the ls?
> > > Have you experimented with the NFS mount options? v2? UDP?
> >
> > I wonder if the ptep_test_and_clear_young() TLB flushing is related.
>
> That, or page_referenced() always returns true on this ARM implementation
> or some such silliness. Everything here points at the VM being unable to
> reclaim that clean pagecache.
How can I tell? Is it something like this: because page_referenced()
always returns true (which I haven't investigated) then the page
eviction code cannot distinguish mapped from cache pages and therefore
selects valuable, mapped pages.
next prev parent reply other threads:[~2004-04-18 5:38 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-17 19:38 vmscan.c heuristic adjustment for smaller systems William Lee Irwin III
2004-04-17 21:29 ` Marc Singer
2004-04-17 21:33 ` William Lee Irwin III
2004-04-17 21:52 ` Marc Singer
2004-04-18 1:06 ` William Lee Irwin III
2004-04-18 5:05 ` Marc Singer
2004-04-17 23:21 ` Andrew Morton
2004-04-17 23:30 ` Marc Singer
2004-04-17 23:51 ` Andrew Morton
2004-04-18 0:11 ` Trond Myklebust
2004-04-18 0:23 ` Marc Singer
2004-04-18 3:37 ` Nick Piggin
2004-04-18 4:17 ` William Lee Irwin III
2004-04-18 4:41 ` Nick Piggin
2004-04-18 5:10 ` Marc Singer
2004-04-18 5:19 ` Nick Piggin
2004-04-18 5:35 ` Marc Singer
2004-04-18 5:41 ` Nick Piggin
2004-04-18 23:44 ` Marc Singer
2004-04-18 9:29 ` Russell King
2004-04-18 1:59 ` William Lee Irwin III
2004-04-18 3:53 ` Andrew Morton
2004-04-18 5:38 ` Marc Singer [this message]
2004-04-18 5:52 ` Andrew Morton
2004-04-18 6:15 ` Marc Singer
2004-04-19 0:26 ` Rik van Riel
2004-04-19 0:39 ` Marc Singer
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