linux-ext4 - Re: zero out blocks of freed user data for operation a virtual machine environment

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Message-ID: <20090525123430.GA5534@cip.informatik.uni-erlangen.de>
Date:	Mon, 25 May 2009 14:34:30 +0200
From:	Thomas Glanzmann <thomas@...nzmann.de>
To:	Theodore Tso <tytso@....edu>,
	Arjan van de Ven <arjan@...radead.org>, tytso@...nk.org,
	LKML <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org
Subject: Re: zero out blocks of freed user data for operation a virtual
	machine environment

Hello Ted,

> Yes, it does, sb_issue_discard().  So if you wanted to hook into this
> routine with a function which issued calls to zero out blocks, it
> would be easy to create a private patch.

that sounds good because it wouldn't only target the most used
filesystem but every other filesystem that uses the interface as well.
Do you think that a tunable or configurable patch has a chance to hit
upstream as well?

        Thomas
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