From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 22 Jun 2022 16:30:07 +0200
Subject: [Cluster-devel] Mounting lock_nolock file systems?
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 <20220621125857.GA6999@lst.de>
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On Tue, Jun 21, 2022 at 02:58:57PM +0200, Christoph Hellwig wrote:
> Sorry, actually it was the pagecache for-next branch from willy.  Looks
> like mainline itself is fine.
> 
> I'll try to get the superblock information from the pagecache branch
> once I find a little time, chasing a bunch of other bugs in the meantime.

I bisected it down to:

commit 1abe0e8c19c514827408ba7e7e84969b6f2e784f
Author: Matthew Wilcox (Oracle) <willy@infradead.org>
Date:   Wed May 18 14:41:39 2022 -0400

    gfs: Check PageUptodate instead of PageError
        
    This is the correct flag to test to know if the read completed
    successfully.
		    
    Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

but I don't have any explanation how it caused that breakage yet.