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Date: Wed, 18 Dec 2024 08:13:23 +0100
From: Christoph Hellwig <hch@lst.de>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>, Carlos Maiolino <cem@kernel.org>,
	Hans Holmberg <hans.holmberg@wdc.com>, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 26/43] xfs: implement zoned garbage collection
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References: <20241211085636.1380516-1-hch@lst.de> <20241211085636.1380516-27-hch@lst.de> <20241213221851.GP6678@frogsfrogsfrogs> <20241215055723.GF10051@lst.de> <20241217012753.GE6174@frogsfrogsfrogs> <20241217040655.GA14856@lst.de> <20241217174233.GM6174@frogsfrogsfrogs>
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On Tue, Dec 17, 2024 at 09:42:33AM -0800, Darrick J. Wong wrote:
> Also: while I was poking around with Felipe's ficlone/swapon test it
> occurred to me -- does freezing the fs actually get the zonegc kthread
> to finish up whatever work is in-flight at that moment?

Looking at the code it probably does not.  Let me see if I can come up
with a test to expose that, i.e. heavy GC activity, freeze, mark the
underlying device RO and see if something explodes (based on my reading
it should right now).