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List:       linux-btrfs
Subject:    Re: [PATCH 1/2] btrfs: punt all bios created in btrfs_submit_compressed_write()
From:       David Sterba <dsterba () suse ! cz>
Date:       2019-12-30 15:08:31
Message-ID: 20191230150831.GT3929 () twin ! jikos ! cz
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On Wed, Dec 11, 2019 at 04:07:06PM -0800, Dennis Zhou wrote:
> Compressed writes happen in the background via kworkers. However, this
> causes bios to be attributed to root bypassing any cgroup limits from
> the actual writer. We tag the first bio with REQ_CGROUP_PUNT, which will
> punt the bio to an appropriate cgroup specific workqueue and attribute
> the IO properly. However, if btrfs_submit_compressed_write() creates a
> new bio, we don't tag it the same way. Add the appropriate tagging for
> subsequent bios.
> 
> Fixes: ec39f7696ccfa ("Btrfs: use REQ_CGROUP_PUNT for worker thread submitted bios")
> Cc: Chris Mason <clm@fb.com>
> Signed-off-by: Dennis Zhou <dennis@kernel.org>

1 and 2 queued for 5.5-rc, thanks.
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