linux-kernel - Re: [PATCH] Fix generic_block_fiemap for files bigger than 4GB

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Date:	Thu, 29 Oct 2009 16:19:45 +0100
From:	Mike Hommey <mh@...ndium.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Josef Bacik <josef@...hat.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Steven Whitehouse <swhiteho@...hat.com>,
	Theodore Ts'o <tytso@....edu>,
	Eric Sandeen <sandeen@...hat.com>,
	Josef Bacik <jbacik@...hat.com>, Mark Fasheh <mfasheh@...e.com>
Subject: Re: [PATCH] Fix generic_block_fiemap for files bigger than 4GB

On Thu, Oct 29, 2009 at 08:17:01AM -0700, Andrew Morton wrote:
> > -	struct buffer_head tmp;
> > -	unsigned int start_blk;
> > -	long long length = 0, map_len = 0;
> > +	struct buffer_head map_bh;
> > +	sector_t start_blk;
> 
> And the bugfix is there.
> 
> Has anyone actually tested this code on large files?  Greater than 4G
> sectors and greater than 4G pages?
> 

I tested my patch with 2TB sparse files that would fail without the patch.

I can give a try to Josef's patch if that's necessary.

Mike
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