linux-ext4 - Re: Ext2/3 block remapping tool

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Message-ID: <20070501152806.GC26093@thunk.org>
Date:	Tue, 1 May 2007 11:28:06 -0400
From:	Theodore Tso <tytso@....edu>
To:	Jan Kara <jack@...e.cz>, linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: Ext2/3 block remapping tool

On Tue, May 01, 2007 at 12:01:42AM -0600, Andreas Dilger wrote:
> Except one other issue with online shrinking is that we need to move
> inodes on occasion and this poses a bunch of other problems over just
> remapping the data blocks.

Well, I did say "necessary", and not "sufficient".  But yes, moving
inodes, especially if the inode is currently open gets interesting.  I
don't think there are that many user space applications that would
notice or care if the st_ino of an open file changed out from under
them, but there are obviously userspace applications, such as tar,
that would most definitely care.

					- Ted
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