From: Miklos Szeredi <miklos@szeredi.hu>
To: jamie@shareable.org
Cc: miklos@szeredi.hu, steve@chygwyn.com, npiggin@suse.de,
akpm@linux-foundation.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [patch] fs: improved handling of page and buffer IO errors
Date: Wed, 22 Oct 2008 16:08:56 +0200 [thread overview]
Message-ID: <E1KseOO-0001HK-Rq@pomaz-ex.szeredi.hu> (raw)
In-Reply-To: <20081022125140.GB826@shareable.org> (message from Jamie Lokier on Wed, 22 Oct 2008 13:51:40 +0100)
On Wed, 22 Oct 2008, Jamie Lokier wrote:
> So GFS goes to great lengths to ensure that read/write are coherent,
> so are mmaps (writable or not), but _splice_ is not coherent in the
> sense that it can send invalid but non-random data? :-)
Spice is not coherent in any sense on any filesystem :)
Your idea about COWing the page would be nice, and I think it may even
be implementable. Currently the biggest problem with splice is the
lack of users, we'd have to solve that first somehow.
> Also, is there still a problem where the data is "valid" but part of
> the page may have been zero'd by truncate, which is then transmitted
> by splice?
Yes.
Miklos
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next prev parent reply other threads:[~2008-10-22 14:08 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-21 11:21 Nick Piggin
2008-10-21 12:52 ` Miklos Szeredi
2008-10-21 12:59 ` steve
2008-10-21 13:14 ` Miklos Szeredi
2008-10-21 13:38 ` steve
2008-10-21 14:32 ` Miklos Szeredi
2008-10-21 15:09 ` steve
2008-10-21 16:13 ` Miklos Szeredi
2008-10-22 12:51 ` Jamie Lokier
2008-10-22 14:08 ` Miklos Szeredi [this message]
2008-10-21 14:35 ` Evgeniy Polyakov
2008-10-21 14:59 ` steve
2008-10-21 16:20 ` Miklos Szeredi
2008-10-21 16:25 ` steve
2008-10-21 16:28 ` Miklos Szeredi
2008-10-21 16:29 ` Matthew Wilcox
2008-10-22 12:48 ` Jamie Lokier
2008-10-22 13:45 ` Matthew Wilcox
2008-10-22 14:02 ` Miklos Szeredi
2008-10-22 14:35 ` Matthew Wilcox
2008-10-22 14:45 ` Miklos Szeredi
2008-10-23 13:48 ` Matthew Wilcox
2008-10-22 22:23 ` Mark Fasheh
2008-10-23 9:59 ` steve
2008-10-23 10:21 ` Nick Piggin
2008-10-23 10:52 ` steve
2008-10-23 11:07 ` Nick Piggin
2008-10-22 13:16 ` Nick Piggin
2008-10-22 20:09 ` Miklos Szeredi
2008-10-21 16:16 ` Andi Kleen
2008-10-21 16:30 ` steve
2008-10-22 10:31 ` Nick Piggin
2008-10-22 18:46 ` Brad Boyer
2008-10-22 20:19 ` Andi Kleen
2008-10-23 7:08 ` Nick Piggin
2008-10-22 23:07 ` Dave Chinner
2008-10-23 7:07 ` Nick Piggin
2008-10-23 9:44 ` steve
2008-10-23 11:15 ` Nick Piggin
2008-10-23 22:48 ` Dave Chinner
2008-10-24 1:05 ` Nick Piggin
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