From: Andrea Arcangeli <andrea@suse.de>
To: John Alvord <jalvo@mbay.net>
Cc: "Juan J. Quintela" <quintela@fi.udc.es>,
Rik van Riel <riel@conectiva.com.br>,
"Stephen C. Tweedie" <sct@redhat.com>,
Marcelo Tosatti <marcelo@conectiva.com.br>,
Jens Axboe <axboe@suse.de>, Alan Cox <alan@redhat.com>,
Derek Martin <derek@cerberus.ne.mediaone.net>,
Linux Kernel <linux-kernel@vger.rutgers.edu>,
linux-mm@kvack.org, "David S. Miller" <davem@redhat.com>
Subject: Re: [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on 2.4.0-test2
Date: Wed, 12 Jul 2000 02:52:26 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.21.0007120247120.8571-100000@inspiron.random> (raw)
In-Reply-To: <396bb43f.25232236@mail.mbay.net>
On Wed, 12 Jul 2000, John Alvord wrote:
>One question that puzzles me... cache for disk files and cache for
>program data will have very unlike characteristics. Executable program
Agreed. That is exactly what I'm trying say by telling that lru_cache and
lru_mapped_cache have different implicit priorities and we can't threat
them in the same way.
>enough, what algorithm is used to achieve an effective balance of
>usage?
In 2.[234].x we basically first try to shrink the cache for disk and when
we run low in cache for disk (so when we start to fail in shrinking it) we
fallback shrinking the cache for program. That's sane algorithm even if
currently it's not very smart in understanding when it's time to shrink
the cache for programs and it's also not able to shrink it properly in
some case.
Andrea
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next prev parent reply other threads:[~2000-07-12 0:52 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20000629114407.A3914@redhat.com>
[not found] ` <Pine.LNX.4.21.0006291330520.1713-100000@inspiron.random>
2000-06-29 13:00 ` Stephen C. Tweedie
2000-07-06 10:35 ` Andrea Arcangeli
2000-07-06 13:29 ` Stephen C. Tweedie
2000-07-09 17:11 ` Swap clustering with new VM Marcelo Tosatti
2000-07-09 20:53 ` Andrea Arcangeli
2000-07-11 9:36 ` Stephen C. Tweedie
2000-07-09 20:31 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on 2.4.0-test2 Andrea Arcangeli
2000-07-11 11:50 ` Stephen C. Tweedie
2000-07-11 16:17 ` Andrea Arcangeli
2000-07-11 16:36 ` Juan J. Quintela
2000-07-11 17:33 ` Andrea Arcangeli
2000-07-11 17:45 ` Rik van Riel
2000-07-11 17:54 ` Andrea Arcangeli
2000-07-11 18:03 ` Juan J. Quintela
2000-07-11 19:32 ` Andrea Arcangeli
2000-07-12 0:05 ` John Alvord
2000-07-12 0:52 ` Andrea Arcangeli [this message]
2000-07-12 18:02 ` Rik van Riel
2000-07-14 8:51 ` Stephen C. Tweedie
2000-07-11 17:32 ` Rik van Riel
2000-07-11 17:41 ` Andrea Arcangeli
2000-07-11 17:47 ` Rik van Riel
2000-07-11 18:00 ` Andrea Arcangeli
2000-07-11 18:06 ` Rik van Riel
2000-07-17 7:09 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on Yannis Smaragdakis
2000-07-17 9:28 ` Stephen C. Tweedie
2000-07-17 13:01 ` James Manning
2000-07-17 14:32 ` Scott F. Kaplan
2000-07-17 14:53 ` Rik van Riel
2000-07-17 16:44 ` Manfred Spraul
2000-07-17 17:02 ` Rik van Riel
2000-07-17 18:55 ` Yannis Smaragdakis
2000-07-17 19:57 ` John Fremlin
2000-07-17 14:46 ` Alan Cox
2000-07-17 14:55 ` Scott F. Kaplan
2000-07-17 15:31 ` Rik van Riel
2000-07-14 9:01 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on 2.4.0-test2 Stephen C. Tweedie
2000-07-11 18:13 ` Juan J. Quintela
2000-07-11 20:57 ` Roger Larsson
2000-07-11 22:49 ` Juan J. Quintela
2000-07-12 16:01 ` Kev
2000-07-06 13:54 ` [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on2.4.0-test2 Roman Zippel
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