linux-ext4 - Re: Feature request: e2fsck -z

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Date:	Wed, 10 Aug 2011 11:04:42 +0000
From:	Florian Weimer <fweimer@....de>
To:	Lukas Czerner <lczerner@...hat.com>
Cc:	Ric Wheeler <ricwheeler@...il.com>,
	Andreas Dilger <adilger@...mcloud.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-ext4@...r.kernel.org
Subject: Re: Feature request: e2fsck -z

* Lukas Czerner:

> On Wed, 10 Aug 2011, Florian Weimer wrote:
>
>> * Lukas Czerner:
>> 
>> > You're right. It is a part of e2fsck and you can enable it with -E
>> > discard.
>> 
>> If the block device does not support TRIM, does this result in zeros
>> being written instead?

> Of course not, discard works only on devices which does support it. If
> the device does not support discard it will to nothing.

Oh, then it doesn't address hpa's use case (improving compression).

-- 
Florian Weimer                <fweimer@....de>
BFK edv-consulting GmbH       http://www.bfk.de/
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