From: Jamie Lokier <jamie@shareable.org>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: chris.mason@oracle.com, viro@zeniv.linux.org.uk,
akpm@linux-foundation.org, adilger@sun.com, tytso@mit.edu,
mfasheh@suse.com, joel.becker@oracle.com, matthew@wil.cx,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
ocfs2-devel@oss.oracle.com, linux-mm@kvack.org,
ngupta@vflare.org, jeremy@goop.org, JBeulich@novell.com,
kurt.hackel@oracle.com, npiggin@suse.de,
dave.mccracken@oracle.com, riel@redhat.com, avi@redhat.com,
konrad.wilk@oracle.com
Subject: Re: [PATCH V2 0/7] Cleancache (was Transcendent Memory): overview
Date: Wed, 2 Jun 2010 14:00:14 +0100 [thread overview]
Message-ID: <20100602130014.GB7238@shareable.org> (raw)
In-Reply-To: <20100528173510.GA12166@ca-server1.us.oracle.com>
Dan Magenheimer wrote:
> Most important, cleancache is "ephemeral". Pages which are copied into
> cleancache have an indefinite lifetime which is completely unknowable
> by the kernel and so may or may not still be in cleancache at any later time.
> Thus, as its name implies, cleancache is not suitable for dirty pages. The
> pseudo-RAM has complete discretion over what pages to preserve and what
> pages to discard and when.
Fwiw, the feature sounds useful to userspace too, for those things
with memory hungry caches like web browsers. Any plans to make it
available to userspace?
Thanks,
-- Jamie
next prev parent reply other threads:[~2010-06-02 13:00 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20100528173510.GA12166@ca-server1.us.oracle.com>
2010-06-02 6:03 ` [PATCH V2 0/7] Cleancache (was Transcendent Memory): overview Minchan Kim
2010-06-02 15:27 ` Dan Magenheimer
2010-06-02 16:38 ` Minchan Kim
2010-06-02 23:02 ` Dan Magenheimer
2010-06-03 2:46 ` Nitin Gupta
2010-06-03 4:53 ` Andreas Dilger
2010-06-03 6:25 ` Nitin Gupta
2010-06-03 15:43 ` Dan Magenheimer
2010-06-04 9:36 ` Nitin Gupta
2010-06-04 13:45 ` Minchan Kim
2010-06-02 13:00 ` Jamie Lokier [this message]
2010-06-02 15:35 ` Dan Magenheimer
2010-06-02 13:24 ` Christoph Hellwig
2010-06-02 16:07 ` Dan Magenheimer
2010-05-28 17:35 Dan Magenheimer
[not found] <20100528173510.GA12166@ca-server1.us.oracle.comAANLkTilV-4_QaNq5O0WSplDx1Oq7JvkgVrEiR1rgf1up@mail.gmail.com>
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