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Date:	Wed, 22 Dec 2010 13:55:01 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] resize2fs: do not clear resize inode for 0 resvd blocks

On Tue, Dec 21, 2010 at 03:32:05PM -0600, Eric Sandeen wrote:
> I ran into odd behavior where mkfs.ext4 of a 16T filesystem would
> create a resize inode with 0 reserved blocks, and mark the resize_inode
> feature.
> 
> A subsequent slight downward resize of the filesystem would remove
> the resize inode, making any further offline resizing impossible.
> 
> This is especially odd in light of the fact that a large downward
> resize (say, to 8T) will actually add blocks to the resize inode -
> so a small resize removes it, a large resize expands it ...
> 
> commit 8ade268cf2fde8629b51bfd1c044a83db88234cd had added this:
> 
>   If the filesystem is grown to the point where the resize_inode is no
>   longer needed, clean it up properly so e2fsck doesn't have to.
> 
> but, it seems e2fsck does not care about this situation, either.
> 
> So, simply leave the resize_inode intact in this case, and everything
> seems to be happy.
> 
> Note, this is for the 1.41.xx branch.
> 
> Signed-off-by: Eric Sandeen <sandeen@...hat.com>

Thanks, applied.

						- Ted


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