linux-ext4 - Re: [PATCH]: e2fsprogs m_* self tests no longer pass

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Message-ID: <alpine.LFD.2.00.1103160910520.21429@dhcp-27-109.brq.redhat.com>
Date:	Wed, 16 Mar 2011 09:14:53 +0100 (CET)
From:	Lukas Czerner <lczerner@...hat.com>
To:	Andreas Dilger <adilger@...mcloud.com>
cc:	Lukas Czerner <lczerner@...hat.com>, "Ted Ts'o" <tytso@....edu>,
	ext4 development <linux-ext4@...r.kernel.org>,
	Bruce Cassidy <bruce@...mcloud.com>
Subject: Re: [PATCH]: e2fsprogs m_* self tests no longer pass

On Tue, 15 Mar 2011, Andreas Dilger wrote:

> Only display the "Discarding device blocks:" status bar if discard is actually implemented in the IO manager and in the kernel.  Otherwise, there is no correct test result that will work in all environments.  I'd prefer not to print an error message for the majority of devices that do not support discard, since this is confusing.
> 
> Signed-off-by: Andreas Dilger <adilger@...ger.ca>
> 
> 

Hi Andreas,

thanks for the patch, it looks good, I have almost the same one in my tree
:). I was wondering if we have any way to tell if the device support discard
or not from the user-space, I did not found any reliable way (other than
actually call BLKDISCARD and see).

Thanks!
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