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charset="us-ascii" Content-ID: <8134D79E4149B84C80CE0CC662473C4C@namprd10.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SJ0PR10MB4688.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: fb9b4191-2b74-4321-7f58-08d93afdf958 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Jun 2021 13:01:13.3193 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ByaNpwHc2T9y9D+Q/pFTMQqU2IASuQ+Ed4UBlDBvo1YGIyJ80lF/8rJ6ylIKT2F0YJmeAG8+ygM561FYBWJP2A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR10MB3192 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=10029 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 bulkscore=0 mlxlogscore=999 phishscore=0 spamscore=0 malwarescore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106290087 X-Proofpoint-GUID: FxvHikVdIfs2lfQOvDzEBNcM2_xwO6KI X-Proofpoint-ORIG-GUID: FxvHikVdIfs2lfQOvDzEBNcM2_xwO6KI Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Justin- > On Jun 29, 2021, at 6:39 AM, Justin Piszcz wrot= e: >=20 > Hello, >=20 > ISSUE: Can no longer mount NFS server(5.13) share. > WORKAROUND: Reverting back to the 5.13-rc7 kernel for the NFS server, all > clients can then mount the share. >=20 > Kernel 5.13 vs. 5.13-rc7 for x86_64 >=20 > With Kernel 5.13-rc7: >=20 > ## mount is successful (from multiple clients, phone, tv, other Linux > client) > # mount 192.168.1.2:/r1 /r1 > # >=20 > With Kernel 5.13 (hangs from multiple clients, phone, tv, other Linux > client) >=20 > ## mount hangs: > # mount 192.168.1.2:/r1 /r1 >=20 > (strace output where it is hanging) > ... > clone(child_stack=3DNULL, > flags=3DCLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, > child_tidptr=3D0x7f2285e303d0) =3D 1741 > wait4(1741, 0x7ffeaab6ce08, 0, NULL) =3D ? ERESTARTSYS (To be restarte= d if > SA_RESTART is set) > --- SIGWINCH {si_signo=3DSIGWINCH, si_code=3DSI_KERNEL} --- > wait4(1741, >=20 > No user changes in the kernel .config other than the comment for the vers= ion > text: >=20 > --- config-20210628.1624867695 2021-06-28 04:08:15.152781940 -0400 > +++ config-20210628.1624867962 2021-06-28 04:12:42.591981706 -0400 > @@ -1,6 +1,6 @@ > # > # Automatically generated file; DO NOT EDIT. > -# Linux/x86 5.13.0-rc7 Kernel Configuration > +# Linux/x86 5.13.0 Kernel Configuration > # > CONFIG_CC_VERSION_TEXT=3D"gcc (Debian 10.2.1-6) 10.2.1 20210110" > CONFIG_CC_IS_GCC=3Dy It's likely this regression is due to a last minute change to alloc_pages_bulk_array() done just before v5.13. See: https://lore.kernel.org/linux-nfs/20210629081432.GE3840@techsingularity.net= /T/#t for details. -- Chuck Lever