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charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM8PR04MB8037.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 67278073-a409-4c11-d0d5-08da694238f1 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Jul 2022 04:50:37.0006 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: TlCFkFUbRDG0s2wDtneEZVTmMTByZ2u2KUKrCIe88WQ/Ii328nTJZW4YixcTuXWjsXPlxcXNJiPkQ+icoS1cs58Da81K75pbsZSZoZm5Xr0= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR04MB0442 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Jun 15, 2022 / 17:16, Keith Busch wrote: > On Wed, Jun 15, 2022 at 02:47:27PM -0500, Bjorn Helgaas wrote: > > On Tue, Jun 14, 2022 at 04:00:45AM +0000, Shinichiro Kawasaki wrote: > > >=20 > > > Yeah, this WARN is confusing for us then it would be valuable to > > > test by blktests not to repeat it. One point I wonder is: which test > > > group the test case will it fall in? The nvme group could be the > > > group to add, probably. > > >=20 > > > Another point I wonder is other kernel test suite than blktests. > > > Don't we have more appropriate test suite to check PCI device > > > rescan/remove race ? Such a test sounds more like a PCI bus > > > sub-system test than block/storage test. > >=20 > > I'm not aware of such a test, but it would be nice to have one. > >=20 > > Can you share your qemu config so I can reproduce this locally? > >=20 > > Thanks for finding and reporting this! >=20 > Hi Bjorn, >=20 > This ought to be reproducible with any pci device that can be removed. Si= nce we > initially observed with nvme, you can try with such a device. A quick way= to > get one appearing in qemu is to add parameters: >=20 > -drive id=3Dn,if=3Dnone,file=3Dnull-co://,format=3Draw \ > -device nvme,serial=3Dfoobar,drive=3Dn Hello Bjorn, Did you have chance to reproduce the WARN? Recently, it was reported again = [1] and getting attention. [1] https://lore.kernel.org/linux-block/4ed3028b-2d2f-8755-fec2-0b9cb5ad42d= 2@fujitsu.com/ --=20 Shin'ichiro Kawasaki=