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more consistent Content-Language: en-US To: chenguanyou , longman@redhat.com, gregkh@linuxfoundation.org Cc: dave@stgolabs.net, hdanton@sina.com, linux-kernel@vger.kernel.org, mazhenhua@xiaomi.com, mingo@redhat.com, peterz@infradead.org, quic_aiquny@quicinc.com, will@kernel.org, John Donnelly , "Peter Zijlstra (Intel)" , sashal@kernel.org References: <20211116012912.723980-1-longman@redhat.com> <20220214154741.12399-1-chenguanyou@xiaomi.com> From: john.p.donnelly@oracle.com In-Reply-To: <20220214154741.12399-1-chenguanyou@xiaomi.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SN7PR04CA0219.namprd04.prod.outlook.com (2603:10b6:806:127::14) To CO1PR10MB4722.namprd10.prod.outlook.com (2603:10b6:303:9e::12) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 64217f09-fd1d-4443-d14e-08da1be8cd06 X-MS-TrafficTypeDiagnostic: BN6PR1001MB2145:EE_ X-Microsoft-Antispam-PRVS: 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X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: NEE9lgxizM4FTomJzdlVRVOoQIA32Iiyi8i+MlIrlYQVfDSNc7a8TjvOdLyGQ6bNrZ442sHRvXaG/VGP5Hlrq8UDoogRHcfNOnRpgi4uULM= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR1001MB2145 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.425,18.0.858 definitions=2022-04-11_07:2022-04-11,2022-04-11 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 spamscore=0 adultscore=0 phishscore=0 mlxscore=0 suspectscore=0 malwarescore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2204110102 X-Proofpoint-GUID: C62m2TLrgeiY9mVI2USkb1JPYWMyh3k8 X-Proofpoint-ORIG-GUID: C62m2TLrgeiY9mVI2USkb1JPYWMyh3k8 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/14/22 9:47 AM, chenguanyou wrote: > Hi Waiman, Greg, > This patch has been merged in branch linux-5.16.y. > Can we take it to the linux-5.10.y LTS version? > > thanks, Hi, As a FYI: We have observed that following lockup with this commit added to 5.15.LTS: d257cc8cb8d5 - locking/rwsem: Make handoff bit handling more consistent (4 months ago) The "fio" test suit fails with LVM devices composed of four NVME devices with these observed lockup, panic. ext4: PID: 3682 TASK: ffff8f489ae34bc0 CPU: 2 COMMAND: "dio/dm-0" #0 [fffffe0000083e50] crash_nmi_callback at ffffffff828772b3 #1 [fffffe0000083e58] nmi_handle at ffffffff82840778 #2 [fffffe0000083ea0] default_do_nmi at ffffffff8337a1e2 #3 [fffffe0000083ec8] exc_nmi at ffffffff8337a48d #4 [fffffe0000083ef0] end_repeat_nmi at ffffffff8340153b [exception RIP: _raw_spin_lock_irq+23] RIP: ffffffff8338b2e7 RSP: ffff9c4409b47c78 RFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff8f489ae34bc0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8f47f7b90104 RBP: ffff9c4409b47d20 R8: 0000000000000000 R9: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8f47f7b90104 R13: ffff9c4409b47cb0 R14: ffff8f47f7b900f0 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 --- #5 [ffff9c4409b47c78] _raw_spin_lock_irq at ffffffff8338b2e7 #6 [ffff9c4409b47c78] rwsem_down_write_slowpath at ffffffff82925be9 #7 [ffff9c4409b47d28] ext4_map_blocks at ffffffffc11c26dc [ext4] #8 [ffff9c4409b47d98] ext4_convert_unwritten_extents at ffffffffc11ad9e0 [ext4] #9 [ffff9c4409b47df0] ext4_dio_write_end_io at ffffffffc11b22aa [ext4] xfs: PID: 3719 TASK: ffff9f81d2d74bc0 CPU: 37 COMMAND: "dio/dm-0" #0 [fffffe0000894e50] crash_nmi_callback at ffffffffad6772b3 #1 [fffffe0000894e58] nmi_handle at ffffffffad640778 #2 [fffffe0000894ea0] default_do_nmi at ffffffffae17a1e2 #3 [fffffe0000894ec8] exc_nmi at ffffffffae17a48d #4 [fffffe0000894ef0] end_repeat_nmi at ffffffffae20153b [exception RIP: _raw_spin_lock_irq+23] RIP: ffffffffae18b2e7 RSP: ffffbb7ec9637c48 RFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff9f81d2d74bc0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9f81c04a918c RBP: ffffbb7ec9637ce8 R8: 0000000000000000 R9: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff9f81c04a918c R13: ffffbb7ec9637c80 R14: ffff9f81c04a9178 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 --- #5 [ffffbb7ec9637c48] _raw_spin_lock_irq at ffffffffae18b2e7 #6 [ffffbb7ec9637c48] rwsem_down_write_slowpath at ffffffffad725be9 #7 [ffffbb7ec9637cf0] xfs_trans_alloc_inode at ffffffffc074f2bd [xfs] #8 [ffffbb7ec9637d50] xfs_iomap_write_unwritten at ffffffffc073ad15 [xfs] #9 [ffffbb7ec9637dd0] xfs_dio_write_end_io at ffffffffc072db62 [xfs] I have reached out to Waiman and he suggested this for our next test pass: 1ee326196c6658 locking/rwsem: Always try to wake waiters in out_nolock path -- Thank you.