linux-ext4 - Re: [PATCH 2/3 V4] debugfs.c: do sparse copy when src is a sparse file

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Message-ID: <20131014024952.GD9609@thunk.org>
Date:	Sun, 13 Oct 2013 22:49:52 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Robert Yang <liezhi.yang@...driver.com>
Cc:	linux-ext4@...r.kernel.org, dvhart@...ux.intel.com,
	darrick.wong@...cle.com
Subject: Re: [PATCH 2/3 V4] debugfs.c: do sparse copy when src is a sparse
 file

On Mon, Aug 26, 2013 at 02:22:03PM +0800, Robert Yang wrote:
> Let debugfs do sparse copy when src is a sparse file, just like
> "cp --sparse=auto"
> 
> * For the:
>   #define IO_BUFSIZE 64*1024
>   this is a suggested value from gnu coreutils:
>   http://git.savannah.gnu.org/gitweb/?p=coreutils.git;a=blob;f=src/ioblksize.h;h=1ae93255e7d0ccf0855208c7ae5888209997bf16;hb=HEAD
> 
> * Use malloc() to allocate memory for the buffer since put 64K (or
>   more) on the stack seems not a good idea.
> 
> Signed-off-by: Robert Yang <liezhi.yang@...driver.com>
> Acked-by: Darren Hart <dvhart@...ux.intel.com>

Applied, thanks.

					- Ted
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