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From:   Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
To:     "hch@infradead.org" <hch@infradead.org>
CC:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
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Subject: Re: [bug report from blktests nvme/032] WARNING: possible circular
 locking dependency detected
Thread-Topic: [bug report from blktests nvme/032] WARNING: possible circular
 locking dependency detected
Thread-Index: AQHYkAjmw6XcqQ1UdE+2h2wJPET+mA==
Date:   Tue, 5 Jul 2022 00:48:10 +0000
Message-ID: <20220705004809.6guf43xwjpq33smo@shindev>
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On Jun 27, 2022 / 23:18, Christoph Hellwig wrote:
> On Tue, Jun 28, 2022 at 08:12:51AM +0200, Greg Kroah-Hartman wrote:
> > Ah, so it's a fake PCI device, or is it a real one?
>=20
> Whatever the blktests configuration points to.  But even if it is
> "fake" that fake would come from the hypervisor.

FYI, the WARN was observed with real PCI NVMe device also. I observed the W=
ARN
with v5.19-rc1 and still observe with v5.19-rc5. I'm not sure which version
introduced the WARN.

I once reported this failure, and shared with linux-pci list.

https://lore.kernel.org/linux-block/20220614010907.bvbrgbz7nnvpnw5w@shindev=
/

--=20
Shin'ichiro Kawasaki=