linux-ext4 - Re: [PATCH] mke2fs support for BLKDISCARD

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Message-ID: <20091116045428.GA17961@mit.edu>
Date:	Sun, 15 Nov 2009 23:54:28 -0500
From:	Theodore Tso <tytso@....edu>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] mke2fs support for BLKDISCARD

On Wed, Oct 07, 2009 at 04:49:17PM -0500, Eric Sandeen wrote:
> Try calling the BLKDISCARD ioctl at mkfs time to pre-discard all blocks
> on an ssd, or a thinly-provisioned storage device.
>
> No real error checking; if it fails, it fails, and that's ok - it's
> just an optimization.  Also, it cannot work in conjunction with
> the undo io manager, for obvious reasons.
>
> Optionally disabled with a "-K" (mnemonic: Keep) option.
>
> Signed-off-by: Eric Sandeen <sandeen@...hat.com>

Added to e2fsprogs's maint branch, thanks.

						- Ted
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