linux-ext4 - Re: [PATCH 1/3] mke2fs: indicate bigalloc feature explicity when cluster-size is enabled

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Message-ID: <20130114202800.GA8049@thunk.org>
Date:	Mon, 14 Jan 2013 15:28:00 -0500
From:	Theodore Ts'o <tytso@....edu>
To:	Zheng Liu <gnehzuil.liu@...il.com>
Cc:	linux-ext4@...r.kernel.org, Zheng Liu <wenqing.lz@...bao.com>
Subject: Re: [PATCH 1/3] mke2fs: indicate bigalloc feature explicity when
 cluster-size is enabled

On Sun, Jan 13, 2013 at 05:08:13PM +0800, Zheng Liu wrote:
> From: Zheng Liu <wenqing.lz@...bao.com>
> 
> When cluster-size is enabled without bigalloc feature, mke2fs will ignore this
> argument silently.  But user might think bigalloc feature has been enabled
> unless they use 'stats' command to check it in debugfs.  So now we ask user
> to set bigalloc feature explicity when cluster-size is enabled.  This can
> make sure that users understand what they are doing because bigalloc might
> impact the performance for some workloads.
> 
> Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>

Thanks, applied.

						- Ted
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