linux-ext4 - Re: [PATCH] mke2fs: restore verbose message for BLKDISCARD

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Message-ID: <87vc91zp45.fsf@octavius.laptop.org>
Date:	Fri, 08 Mar 2013 14:08:10 -0500
From:	Chris Ball <cjb@...top.org>
To:	Theodore Ts'o <tytso@....edu>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	Lukáš Czerner <lczerner@...hat.com>,
	linux-ext4@...r.kernel.org, Stephen Warren <swarren@...dia.com>
Subject: Re: [PATCH] mke2fs: restore verbose message for BLKDISCARD

Hi,

On Fri, Mar 08 2013, Theodore Ts'o wrote:
> I hate to suggest this, but there's so many crappy devices out there
> that I'm wondering if we need to figure out some way of maintaining a
> black list of devices that don't handle discard properly.

Yes, we already do that in the MMC layer.  See e.g.:

http://git.kernel.org/cgit/linux/kernel/git/cjb/mmc.git/commit/?id=3550ccdb9d8d350e526b809bf3dd92b550a74fe1
("mmc: card: Skip secure erase on MoviNAND; causes unrecoverable corruption.")

Thanks,

- Chris.
-- 
Chris Ball   <cjb@...top.org>   <http://printf.net/>
One Laptop Per Child
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