linux-kernel - Re: [PATCH 1/2] fs: add SEEK_HOLE and SEEK

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Message-ID: <20110422200945.GA15387@elie>
Date:	Fri, 22 Apr 2011 15:10:01 -0500
From:	Jonathan Nieder <jrnieder@...il.com>
To:	Josef Bacik <josef@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, hch@...radead.org
Subject: Re: [PATCH 1/2] fs: add SEEK_HOLE and SEEK_DATA flags

Hi,

Josef Bacik wrote:

> This just gets us ready to support the SEEK_HOLE and SEEK_DATA flags.  Turns out
> using fiemap in things like cp cause more problems than it solves, so lets try
> and give userspace an interface that doesn't suck.  So we have

That's easy to believe, but could you elaborate?  What problem does
using fiemap cause?  I assume the answer is somewhere in somewhere in
the thread

 http://thread.gmane.org/gmane.comp.file-systems.xfs.general/37895/focus=24404

but it would be nice to have a summary in the commit log for
posterity.

Thanks for working on this.
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