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Date:   Mon, 2 May 2022 09:44:25 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Qu Wenruo <quwenruo.btrfs@gmx.com>
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Subject: Re: [PATCH 05/10] btrfs: defer I/O completion based on the
 btrfs_raid_bio
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On Sun, May 01, 2022 at 12:53:00PM +0800, Qu Wenruo wrote:
> > It looks like this patch is causing test failure in btrfs/027, at least
> > for subapge (64K page size, 4K sectorsize) cases.
> 
> Also confirmed the same hang on the same commit on x86_64 (4K page size
> 4K sectorsize).
> 
> Also 100% reproducible.

I'll take a look.  It turns out I never actually run that test as it
doesn't run without at least 5 devices in the scratch pool, and my btrfs
config uses 4.