From: Shaohua Li <shli@kernel.org>
To: Seth Jennings <sjenning@linux.vnet.ibm.com>
Cc: linux-mm@kvack.org, bob.liu@oracle.com, dan.magenheimer@oracle.com
Subject: Re: [RFC 0/4] cleancache: SSD backed cleancache backend
Date: Sun, 29 Sep 2013 17:19:23 +0800 [thread overview]
Message-ID: <20130929091923.GA376@kernel.org> (raw)
In-Reply-To: <20130926161401.GA3288@medulla.variantweb.net>
On Thu, Sep 26, 2013 at 11:14:01AM -0500, Seth Jennings wrote:
> On Thu, Sep 26, 2013 at 10:14:28PM +0800, Shaohua Li wrote:
> > Hi,
> >
> > This is a cleancache backend which caches page to disk, usually a SSD. The
> > usage model is similar like Windows readyboost. Eg, user plugs a USB drive,
> > and we use the USB drive to cache clean pages to reduce IO to hard disks.
>
> Very interesting! A few thoughts:
>
> It seems that this is doing at the page level what bcache/dm-cache do at
> the block layer. What is the advantage of doing it this way?
That's true. It's only helpful for case of temporary caching. If a SSD is
dedicated for caching, bcache/dm-cache is always generic.
Thanks,
Shaohua
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next prev parent reply other threads:[~2013-09-29 9:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-26 14:14 [RFC 0/4] cleancache: SSD backed cleancache backend Shaohua Li
2013-09-26 14:14 ` [RFC 1/4] cleancache: make put_page async possible Shaohua Li
2013-09-26 14:14 ` [RFC 2/4] cleancache: make get_page " Shaohua Li
2013-09-26 14:14 ` [RFC 3/4] cleancache: invalidate cache at dirty page Shaohua Li
2013-09-26 14:14 ` [RFC 4/4] cleancache: SSD backed cleancache backend Shaohua Li
2013-09-26 16:14 ` [RFC 0/4] " Seth Jennings
2013-09-29 9:19 ` Shaohua Li [this message]
2013-10-09 11:52 ` Theodore Ts'o
2013-10-10 10:24 ` Alex Elsayed
2013-10-10 10:38 ` Bob Liu
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