From: Miklos.Szeredi@eth.ericsson.se (Miklos Szeredi)
To: Jamie Lokier <lfs@tantalophile.demon.co.uk>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
avfs@fazekas.hu
Subject: Re: Introducing FUSE: Filesystem in USErspace
Date: Mon, 19 Nov 2001 09:48:01 +0100 (MET) [thread overview]
Message-ID: <200111190848.JAA23707@duna207.danubius> (raw)
In-Reply-To: <20011117175253.A5003@kushida.jlokier.co.uk> (message from Jamie Lokier on Sat, 17 Nov 2001 17:52:53 +0000)
In-Reply-To: <200111121128.MAA15119@duna207.danubius> <20011117175253.A5003@kushida.jlokier.co.uk>
> Minimal caching? I would hope for maximal caching, for when userspace
> is able to say "yes the page you have is still valid". Preferably
> without a round trip to userspace for every page.
I made some performance tests with FUSE, and the raw throughput is
about 60MBytes/s on a Celeron/360 for both reads and writes. And yes,
that includes two context switches and a copy_to_user/copy_from_user
pair for each page.
I think that at such speed it's not really such a grave problem if
caching is not done in kernel, and it simplifies things a _lot_.
Miklos
prev parent reply other threads:[~2001-11-19 8:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-12 11:28 Introducing FUSE: Filesystem in USErspace Miklos Szeredi
2001-11-17 17:52 ` Jamie Lokier
2001-11-18 16:35 ` Per-Olof Pettersson
2001-11-19 8:48 ` Miklos Szeredi [this message]
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