From: Miklos Szeredi <miklos@szeredi.hu>
To: jamie@shareable.org
Cc: miklos@szeredi.hu, torvalds@linux-foundation.org,
jens.axboe@oracle.com, akpm@linux-foundation.org,
nickpiggin@yahoo.com.au, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [patch v3] splice: fix race with page invalidation
Date: Thu, 31 Jul 2008 09:30:11 +0200 [thread overview]
Message-ID: <E1KOSbz-0007b6-0L@pomaz-ex.szeredi.hu> (raw)
In-Reply-To: <20080731001131.GA30900@shareable.org> (message from Jamie Lokier on Thu, 31 Jul 2008 01:11:31 +0100)
On Thu, 31 Jul 2008, Jamie Lokier wrote:
> I'm more concerned by sendfile() users like Apache, Samba, FTPd. In
> an earlier thread on this topic, I asked if the splice bug can also
> result in sendfile() sending blocks of zeros, when a file is truncated
> after it has been sent, and the answer was yes probably.
>
> Not that I checked or anything. But if it affects sendfile() it's a
> bigger deal - that has many users.
Nick also pointed out, that it also affects plain read(2), albeit only
with a tiny window.
But partial truncates are _rare_ (we don't even have a UNIX utility
for that ;), so in practice all this may not actually matter very
much.
Miklos
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next prev parent reply other threads:[~2008-07-31 7:30 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-30 9:43 Miklos Szeredi
2008-07-30 17:00 ` Linus Torvalds
2008-07-30 17:29 ` Miklos Szeredi
2008-07-30 17:54 ` Jens Axboe
2008-07-30 18:32 ` Miklos Szeredi
2008-07-30 18:43 ` Miklos Szeredi
2008-07-30 19:45 ` Jens Axboe
2008-07-30 20:05 ` Miklos Szeredi
2008-07-30 20:13 ` Linus Torvalds
2008-07-30 20:45 ` Miklos Szeredi
2008-07-30 20:51 ` Linus Torvalds
2008-07-30 21:16 ` Miklos Szeredi
2008-07-30 21:22 ` Linus Torvalds
2008-07-30 21:46 ` Miklos Szeredi
2008-07-30 21:56 ` Linus Torvalds
2008-07-31 0:11 ` Jamie Lokier
2008-07-31 0:42 ` Jamie Lokier
2008-07-31 0:51 ` Linus Torvalds
2008-07-31 0:54 ` Linus Torvalds
2008-07-31 6:12 ` Jamie Lokier
2008-07-31 10:26 ` Evgeniy Polyakov
2008-07-31 12:33 ` Jamie Lokier
2008-07-31 12:49 ` Nick Piggin
2008-07-31 13:29 ` Evgeniy Polyakov
2008-07-31 16:56 ` Linus Torvalds
2008-07-31 16:34 ` Linus Torvalds
2008-07-31 17:21 ` Jamie Lokier
2008-07-31 18:54 ` Linus Torvalds
2008-07-31 7:30 ` Miklos Szeredi [this message]
2008-07-31 2:16 ` Nick Piggin
2008-07-31 12:59 ` Nick Piggin
2008-07-31 17:00 ` Linus Torvalds
2008-07-31 18:13 ` Miklos Szeredi
2008-08-01 1:22 ` Nick Piggin
2008-08-01 18:28 ` Miklos Szeredi
2008-08-01 18:32 ` Linus Torvalds
2008-08-02 4:26 ` Nick Piggin
2008-08-04 15:29 ` Jamie Lokier
2008-08-05 2:57 ` Nick Piggin
2008-08-11 3:22 ` Michael Kerrisk
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