From: Dmitry Monakhov <dmonakhov@openvz.org>
To: "Bo Brantén" <bosse@acc.umu.se>
Cc: linux-ext4@vger.kernel.org
Subject: Re: persistent preallocation
Date: Tue, 03 Aug 2010 15:18:28 +0400 [thread overview]
Message-ID: <87aap4aqrf.fsf@dmon-lap.sw.ru> (raw)
In-Reply-To: <Pine.A41.4.64.1008031256060.1073402@stalin.acc.umu.se> ("Bo Brantén"'s message of "Tue, 3 Aug 2010 12:58:21 +0200 (CEST)")
Bo Brantén <bosse@acc.umu.se> writes:
> Hello,
>
> I have a question on the implementation of persistent preallocation,
> the reason to not return the disk block is because it can contain old
> data but I wonder if an implementation has to return zeros instead or
Please look at fallocate(2) syscall.
> if it could return any garbage as long as it is not _that_ garbage?
Off course it is not a garbage, it is old user's data which may be
very very useful (old passwords, cookies, and etc)for person who has
time to analyze it :)
>
> Bo Branten
>
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next prev parent reply other threads:[~2010-08-03 11:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-03 10:58 persistent preallocation Bo Brantén
2010-08-03 11:18 ` Dmitry Monakhov [this message]
2010-08-03 16:25 ` Eric Sandeen
2010-08-03 18:06 ` Ted Ts'o
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