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Message-ID: <20141215020951.GB17575@thunk.org>
Date: Sun, 14 Dec 2014 21:09:51 -0500
From: Theodore Ts'o <tytso@....edu>
To: "Darrick J. Wong" <darrick.wong@...cle.com>
Cc: linux-ext4@...r.kernel.org
Subject: Re: [PATCH 26/47] resize2fs: use old_fs to detect per-bg metadata
blocks to free
On Fri, Nov 07, 2014 at 01:53:35PM -0800, Darrick J. Wong wrote:
> When shrinking a filesystem, resize2fs wants to free per-bg metadata
> blocks that are no longer needed. This behavior is gated on whether
> there's a superblock in the group as told by new_fs. The check really
> should be against old_fs, since we're effectively freeing blocks out
> of old_fs in the transition to new_fs, but prior to sparse_super2 this
> didn't matter since superblocks didn't move, so it didn't matter.
>
> Under sparse_super2, however, there's a superblock in the last group,
> so now we need to change the test to use old_fs as it should.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
Applied, thanks.
- Ted
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