From: Andrew Morton <akpm@osdl.org>
To: Nikita Danilov <nikita@clusterfs.com>
Cc: linux-mm@kvack.org
Subject: Re: [PATCH]: VM 7/8 cluster pageout
Date: Mon, 25 Apr 2005 21:15:14 -0700 [thread overview]
Message-ID: <20050425211514.29e7c86b.akpm@osdl.org> (raw)
In-Reply-To: <16994.40699.267629.21475@gargle.gargle.HOWL>
Nikita Danilov <nikita@clusterfs.com> wrote:
>
> Implement pageout clustering at the VM level.
I dunno...
Once __mpage_writepages() has started I/O against the pivot page, I don't
see that we have any guarantees that some other CPU cannot come in,
truncated or reclaim all the inode's pages and then reclaimed the inode
altogether. While __mpage_writepages() is still dinking with it all.
I had something like this happening in 2.5.10(ish), but ended up deciding
it was all too complex and writeout from the LRU is rare and the pages are
probably close-by on the LRU and the elevator sorting would catch most
cases so I tossed it all out.
Plus some of your other patches make LRU-based writeout even less common.
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next prev parent reply other threads:[~2005-04-26 4:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-17 17:38 Nikita Danilov
2005-04-26 4:15 ` Andrew Morton [this message]
2005-04-26 9:16 ` Nikita Danilov
2005-04-26 9:36 ` Andrew Morton
2005-04-26 16:19 ` Nikita Danilov
2005-04-26 19:39 ` Andrew Morton
2005-05-02 4:12 ` William Lee Irwin III
2005-05-02 5:51 ` Rik van Riel
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