From: Ingo Molnar <mingo@elte.hu>
To: Andrea Arcangeli <andrea@suse.de>
Cc: Rik van Riel <riel@conectiva.com.br>,
Linus Torvalds <torvalds@transmeta.com>,
MM mailing list <linux-mm@kvack.org>,
"Stephen C. Tweedie" <sct@redhat.com>
Subject: Re: [highmem bug report against -test5 and -test6] Re: [PATCH] Re: simple FS application that hangs 2.4-test5, mem mgmt problem or FS buffer cache mgmt problem? (fwd)
Date: Tue, 3 Oct 2000 14:05:46 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.21.0010031404300.3569-100000@elte.hu> (raw)
In-Reply-To: <20001003012546.C27493@athlon.random>
On Tue, 3 Oct 2000, Andrea Arcangeli wrote:
> > it can and does lose them - but only all of them. Aging OTOH is a per-bh
> > thing, this kind of granularity is simply not present in the current
> > page->buffers handling. This is all i wanted to mention. Not unsolvable,
>
> I'm pretty sure it doesn't worth the per-bh thing. And even if it
> would make any difference with a 1k fs for good performance 4k blksize
> is necessary anyway for other reasons.
well if those bhs are aged by the normal buffer-cache aging mechanizm,
then there is no choice but to age them at bh granularity, not page
granularity. (this is only interesting in the case of 1k filesystems.)
Aging page->buffers at bh granularity creates interesting situations.
Ingo
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prev parent reply other threads:[~2000-10-03 12:05 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-02 19:35 Rik van Riel
2000-10-02 19:56 ` Andrea Arcangeli
2000-10-02 19:59 ` Rik van Riel
2000-10-02 20:17 ` Andrea Arcangeli
2000-10-02 20:24 ` Rik van Riel
2000-10-02 21:16 ` Linus Torvalds
2000-10-02 20:06 ` Linus Torvalds
2000-10-02 20:16 ` Rik van Riel
2000-10-02 20:25 ` Ingo Molnar
2000-10-02 20:45 ` Rik van Riel
2000-10-02 21:21 ` Linus Torvalds
2000-10-02 21:27 ` Rik van Riel
2000-10-02 21:19 ` Linus Torvalds
2000-10-02 21:23 ` Rik van Riel
2000-10-02 21:31 ` Linus Torvalds
2000-10-02 21:42 ` Rik van Riel
2000-10-02 21:58 ` Linus Torvalds
2000-10-02 22:08 ` Rik van Riel
2000-10-02 22:18 ` Andrea Arcangeli
2000-10-02 22:23 ` Rik van Riel
2000-10-02 23:06 ` Linus Torvalds
2000-10-02 23:12 ` Rik van Riel
2000-10-02 23:16 ` Linus Torvalds
2000-10-02 23:20 ` Andrea Arcangeli
2000-10-02 22:53 ` Linus Torvalds
2000-10-02 23:06 ` Rik van Riel
2000-10-02 23:14 ` Linus Torvalds
2000-10-02 21:57 ` Ingo Molnar
2000-10-02 21:52 ` Rik van Riel
2000-10-02 22:53 ` Ingo Molnar
2000-10-02 23:01 ` Rik van Riel
2000-10-02 23:10 ` Andrea Arcangeli
2000-10-02 23:29 ` Ingo Molnar
2000-10-02 23:25 ` Andrea Arcangeli
2000-10-02 23:32 ` Linus Torvalds
2000-10-03 12:05 ` Ingo Molnar [this message]
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