From: Zlatko Calusic <zlatko@iskon.hr>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Rik van Riel <riel@conectiva.com.br>,
linux-kernel@vger.kernel.org
Subject: Re: Subtle MM bug
Date: 09 Jan 2001 13:29:00 +0100 [thread overview]
Message-ID: <dnbstgewoj.fsf@magla.iskon.hr> (raw)
In-Reply-To: <Pine.LNX.4.10.10101082322030.1222-100000@penguin.transmeta.com>
In-Reply-To: Linus Torvalds's message of "Mon, 8 Jan 2001 23:27:15 -0800 (PST)"
Linus Torvalds <torvalds@transmeta.com> writes:
> On 8 Jan 2001, Eric W. Biederman wrote:
>
> > Zlatko Calusic <zlatko@iskon.hr> writes:>
> > >
> > > Yes, but a lot more data on the swap also means degraded performance,
> > > because the disk head has to seek around in the much bigger area. Are
> > > you sure this is all OK?
> >
> > I don't think we have more data on the swap, just more data has an
> > allocated home on the swap.
>
> I think Zlatko's point is that because of the extra allocations, we will
> have worse locality (more seeks etc).
Yes that was my concern.
But in the end I'm not sure. I made two simple tests and haven't found
any problems with 2.4.0 mm logic (opposed to 2.2.17). In fact, the new
kernel was faster in the more interesting (make -j32) test.
Also I have found that new kernel allocates 4 times more swap space
under some circumstances. That may or may not be alarming, it remains
to be seen.
--
Zlatko
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next prev parent reply other threads:[~2001-01-09 12:29 UTC|newest]
Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-08 5:29 Subtle MM bug Wayne Whitney
2001-01-08 5:42 ` Andi Kleen
2001-01-08 6:04 ` Linus Torvalds
2001-01-08 17:44 ` Rik van Riel
2001-01-08 18:02 ` Linus Torvalds
2001-01-08 17:16 ` Rik van Riel
2001-01-08 17:58 ` Linus Torvalds
2001-01-08 23:41 ` Zlatko Calusic
2001-01-09 2:58 ` Linus Torvalds
2001-01-09 6:20 ` Eric W. Biederman
2001-01-09 7:27 ` Linus Torvalds
2001-01-09 11:38 ` Eric W. Biederman
2001-01-09 12:29 ` Zlatko Calusic [this message]
2001-01-09 18:47 ` Linus Torvalds
2001-01-09 19:09 ` Daniel Phillips
2001-01-09 19:29 ` Trond Myklebust
2001-01-10 17:32 ` Andi Kleen
2001-01-10 19:31 ` Alan Cox
2001-01-10 19:33 ` Andi Kleen
2001-01-10 19:40 ` Alan Cox
2001-01-10 19:43 ` Andi Kleen
2001-01-10 19:48 ` Alan Cox
2001-01-10 19:48 ` Andi Kleen
2001-01-11 9:51 ` Trond Myklebust
2001-01-10 20:11 ` Linus Torvalds
2001-01-11 12:56 ` Stephen C. Tweedie
2001-01-11 13:10 ` Andi Kleen
2001-01-11 13:12 ` Trond Myklebust
2001-01-11 14:13 ` Stephen C. Tweedie
2001-01-11 19:03 ` Alexander Viro
2001-01-11 19:47 ` Stephen C. Tweedie
2001-01-11 19:57 ` Alexander Viro
2001-01-11 16:50 ` Albert D. Cahalan
2001-01-11 17:35 ` Stephen C. Tweedie
2001-01-11 19:38 ` Albert D. Cahalan
2001-01-11 19:01 ` Alexander Viro
2001-01-09 19:37 ` Linus Torvalds
2001-01-17 8:46 ` Rik van Riel
2001-01-25 22:51 ` Daniel Phillips
2001-01-09 19:53 ` Simon Kirby
2001-01-09 20:08 ` Linus Torvalds
2001-01-09 20:10 ` Zlatko Calusic
2001-01-10 1:45 ` David Woodhouse
2001-01-10 2:26 ` Andrea Arcangeli
2001-01-10 6:57 ` Linus Torvalds
2001-01-10 11:46 ` David Woodhouse
2001-01-10 14:56 ` Andrea Arcangeli
2001-01-10 17:46 ` Eric W. Biederman
2001-01-10 18:33 ` Andrea Arcangeli
2001-01-17 14:26 ` Rik van Riel
2001-01-10 19:03 ` Linus Torvalds
2001-01-10 19:27 ` David S. Miller
2001-01-10 19:36 ` Alan Cox
2001-01-10 23:56 ` David Weinehall
2001-01-11 0:24 ` Alan Cox
2001-01-12 5:56 ` Ralf Baechle
2001-01-12 16:10 ` Eric W. Biederman
2001-01-12 21:11 ` Russell King
2001-01-15 2:56 ` Ralf Baechle
2001-01-15 6:59 ` Eric W. Biederman
2001-01-15 2:53 ` Ralf Baechle
2001-01-15 8:41 ` Caches, page coloring, virtual indexed caches, and more Eric W. Biederman
2001-01-15 11:54 ` Ralf Baechle
2001-01-15 12:53 ` Anton Blanchard
2001-01-15 17:41 ` Ralf Baechle
2001-01-17 4:36 ` Anton Blanchard
2001-01-16 9:34 ` Eric W. Biederman
2001-01-17 4:43 ` Anton Blanchard
2001-01-17 8:35 ` Eric W. Biederman
2001-01-15 17:16 ` Eric W. Biederman
2001-01-15 17:16 ` Eric W. Biederman
2001-01-16 4:58 ` Ralf Baechle
2001-01-16 4:58 ` Ralf Baechle
2001-01-15 18:22 ` Jamie Lokier
2001-01-15 12:51 ` Anton Blanchard
2001-01-17 14:28 ` Subtle MM bug Rik van Riel
2001-01-18 1:23 ` Linus Torvalds
2001-01-18 11:48 ` Rik van Riel
2001-01-10 17:03 ` Linus Torvalds
2001-01-11 14:36 ` Jim Gettys
2001-01-08 21:30 ` Wayne Whitney
-- strict thread matches above, loose matches on Subject: below --
2001-01-10 19:57 Chris Wing
2001-01-08 20:39 Szabolcs Szakacsits
2001-01-08 21:56 ` Wayne Whitney
2001-01-08 23:22 ` Wayne Whitney
2001-01-08 23:30 ` Andrea Arcangeli
2001-01-09 0:37 ` Linus Torvalds
2001-01-08 22:00 ` Wayne Whitney
2001-01-08 22:15 ` Andrea Arcangeli
[not found] <200101080602.WAA02132@pizda.ninka.net>
2001-01-08 6:42 ` Linus Torvalds
2001-01-08 13:11 ` Marcelo Tosatti
2001-01-08 16:42 ` Rik van Riel
2001-01-08 17:43 ` Linus Torvalds
2001-01-08 13:57 ` Stephen C. Tweedie
2001-01-08 17:29 ` Linus Torvalds
2001-01-08 18:10 ` Stephen C. Tweedie
2001-01-08 21:52 ` Marcelo Tosatti
2001-01-09 0:28 ` Linus Torvalds
2001-01-08 23:49 ` Marcelo Tosatti
2001-01-09 3:12 ` Linus Torvalds
2001-01-09 20:33 ` Marcelo Tosatti
2001-01-09 22:44 ` Linus Torvalds
2001-01-09 21:33 ` Marcelo Tosatti
2001-01-09 23:58 ` Linus Torvalds
2001-01-09 22:21 ` Marcelo Tosatti
2001-01-10 0:23 ` Linus Torvalds
2001-01-10 0:12 ` Marcelo Tosatti
2001-01-10 11:29 ` Stephen C. Tweedie
2001-01-11 3:30 ` Marcelo Tosatti
2001-01-11 9:42 ` Stephen C. Tweedie
2001-01-11 15:24 ` Marcelo Tosatti
2001-01-17 4:54 ` Rik van Riel
2001-01-08 16:45 ` Rik van Riel
2001-01-08 17:50 ` Linus Torvalds
2001-01-08 18:21 ` Rik van Riel
2001-01-08 18:38 ` Linus Torvalds
2001-01-07 20:59 Zlatko Calusic
2001-01-07 20:59 ` Zlatko Calusic
2001-01-07 21:37 ` Rik van Riel
2001-01-07 21:37 ` Rik van Riel
2001-01-07 22:33 ` Zlatko Calusic
2001-01-07 22:33 ` Zlatko Calusic
2001-01-09 2:01 ` Zlatko Calusic
2001-01-09 2:01 ` Zlatko Calusic
2001-01-17 4:48 ` Rik van Riel
2001-01-17 4:48 ` Rik van Riel
2001-01-17 18:53 ` Zlatko Calusic
2001-01-17 18:53 ` Zlatko Calusic
2001-01-18 1:32 ` Rik van Riel
2001-01-18 1:32 ` Rik van Riel
2001-04-17 19:37 ` H. Peter Anvin
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