linux-ext4 - Re: [PATCH] ext4: Add support for SFITRIM, an ioctl for secure FITRIM.

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Message-ID: <CAKP4w2RoHxhTRmSbSYH8FAgvEMXifZBcOR87Pww9skTRAo8fmw@mail.gmail.com>
Date:	Wed, 18 Jun 2014 14:51:42 -0700
From:	JP Abgrall <jpa@...gle.com>
To:	Lukáš Czerner <lczerner@...hat.com>
Cc:	"Theodore Ts'o" <tytso@....edu>,
	Dave Chinner <david@...morbit.com>,
	Eric Sandeen <sandeen@...hat.com>, linux-ext4@...r.kernel.org,
	Geremy Condra <gcondra@...gle.com>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH] ext4: Add support for SFITRIM, an ioctl for secure FITRIM.

On Wed, Jun 18, 2014 at 2:33 AM, Lukáš Czerner <lczerner@...hat.com> wrote:
> Except when it does not. Looking at the mmc driver I can see that we
> have already some devices where secure trim is broken.


And that is why we don't just blindly use random eMMC devices.

> Let's call is deep discard, or whatever but avoid the security word
> at least when file system comes into play.

Best effort discard :)
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