Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18;
Message-ID: <006692da-5923-824d-d7bc-423e5cd980ef@oracle.com>
Date:   Tue, 26 Apr 2022 13:55:25 -0500
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.8.0
Subject: Re: [PATCH 5.15 000/124] 5.15.36-rc1 review
Content-Language: en-US
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        torvalds@linux-foundation.org, akpm@linux-foundation.org,
        linux@roeck-us.net, shuah@kernel.org, patches@kernelci.org,
        lkft-triage@lists.linaro.org, pavel@denx.de, jonathanh@nvidia.com,
        f.fainelli@gmail.com, sudipm.mukherjee@gmail.com,
        slade@sladewatkins.com, Waiman Long <longman@redhat.com>
References: <20220426081747.286685339@linuxfoundation.org>
 <09eb98b8-6200-20c2-faa2-ced7f0e4fc95@oracle.com>
 <Ymgxd6WGhUBuntkS@kroah.com>
 <e1eb47ea-7327-7565-3a8f-3d9cf4ee904c@oracle.com>
 <Ymg8MSKq93nSS1rq@kroah.com>
From:   John Donnelly <john.p.donnelly@oracle.com>
In-Reply-To: <Ymg8MSKq93nSS1rq@kroah.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?NEM4UUdOOUlMRkFSQ1FNaVZMdUNBYjhxc2wyNFlKcDRrQTNLejBuWTMyTmhC?=
 =?utf-8?B?L1YrM2RoaTVHWXFqZXZVNnFNWmhBYjUrNmtkVTBFRUFTWjRKMFhXbW03dm9a?=
 =?utf-8?B?eWR2cy9PNmtlOE9QdUFORXpBSlkzZ3g4THNBSnJKZkVuTVdoZ2FyUnkzV2VQ?=
 =?utf-8?B?Y1RzMlgwTTUxNk9BTWFnMElIaGVhNDVXY2YzdVBHalBOOUoxeVBUWkptT2dj?=
 =?utf-8?B?L2dFUDBJYWR4Rndqbm9sM3NudkZiNC9oRmVQSWQwSCtUaEtpL2ZYOEVjVWE4?=
 =?utf-8?B?ZkRJUHFBVCtnYVhpYVVldUhwVDdud0lGVzROdWRYUCsxMjVQTVBvZVRrcnN4?=
 =?utf-8?B?TzVGak1yNFVOdjhhYWU0SkUvQ29xZVpKbERaZFo2NTRYZFM4UFZ6MldSYlUw?=
 =?utf-8?B?ZDJ6eHprRHZtU2NOamRKMXFMQ0FMVDFsWkFzelFkN2szQStjeC9DSVh1MFJu?=
 =?utf-8?B?Y3RFcFNkR2tTOHpRVW94Z0QrTEZjRThpZGN6djFCUnJkekFteHhGRlJud1p5?=
 =?utf-8?B?a2M4WTRxZmFoSGVwRGg1cDRpTXJiNkZORG1lTFhFVXJKd1VNYnZSdUxiTEZi?=
 =?utf-8?B?RDR1OTR0cjZTMENpcEk3aGVOdFo0RkJmclp6c2lQU0hFVFAvdGhyM3JYY2hK?=
 =?utf-8?B?REh2ZE9RYWNjRHNKN2tNUE1RUmdpL004N1FrSVpKckF6WEdHQ2d6N1o0MmlH?=
 =?utf-8?B?bjVBNVM4Rm5NNjZpQkNLdDM3TFM2TFZhZUsydmx6R0NmZXdXOGhiMnZPeC9x?=
 =?utf-8?B?SEMwbEtUc1VvelhQR1lQeEVRSmg4ZEszWVBxQmEwR2tZNXhpU2xZWUFUQ2pC?=
 =?utf-8?B?dWFBYnRLRUQxT2lVQ2FDRGpMZWxPWVZhS25RZlRRdWdxOGk4THJ0U1ZZaFlP?=
 =?utf-8?B?MVpsYmNQKzBlOXczRjJxb25iWktMTDVLaXdMVWpiVG9XeWE1VXc1SUZ0TmxM?=
 =?utf-8?B?Um5HSXJvWUlZWk5tVkI4ZWNrSUdmbnoyL1JuTllsL2QvNTVKVGhTT3dOcnRx?=
 =?utf-8?B?Q2ZJUjEyekNHL2FnSVYwTVhlQWR6VzVEN2xGN2w5RkVlU1FlbzhnUEFIT3VQ?=
 =?utf-8?B?YVdGTXdMQkpQUHdjTkszRks1NllWU21hWlBTaTIrY0Q5VUxCSWkxWkZYWnRs?=
 =?utf-8?B?ZklpK1NCMytmb1NjVHJWQzNXQi9NRUdyZGc1SlZOUlA4YTd1cEJEdGppUlIz?=
 =?utf-8?B?d3R0Zk1vblI0dzRyVnhoWXpvQ1c3dUtqSzZpZGsxR1RZa015V0REaUxad0dQ?=
 =?utf-8?B?dmkwWmgzK1lveHViYk1leW43MWJTaEdubEc0VERKc2tGbkk2SzFGTkQ1K21m?=
 =?utf-8?B?dEZOTzdESzhxOGdVM2VXbEo0a0RSdFF1bU0zTk43SWpVYm5mMEtkUzVGU2JP?=
 =?utf-8?B?cFNMSGtHdTFMZ0M0TGg0Z2MrWVdCbllvZ1BHQSszbHFGNUZVSGluaEFxUGVa?=
 =?utf-8?B?bGFNNlY0YWRsOHVURkRJYjZaWGVMTWgzc1E3OGMwWFhoR3NlbFlmZFAvWkFM?=
 =?utf-8?B?NU9sNUhuYUZNNkRJbFlTVTJ5UlZlMnZidjVhaVRlU0hWaENYZWJ4MjNpNWN4?=
 =?utf-8?B?NUtWN0hicFZBZUFQSzl5NlhWU0E2cS9XRmIwU3lKb3ZTTDV1cXhxSHFNYmds?=
 =?utf-8?B?ODFHQ0N2c0FEelNFWEpkSWtVL09KOVJkbjNYS3NiU3ByTlR2YVlUT3JINTJM?=
 =?utf-8?B?QXVZaVEweXZNNHR5VEY2V2hYWDBxb1pwQVl3dzBmUTNtUUpvd3pRdTdoeUVY?=
 =?utf-8?B?ZTR2ZGplbnkrYzN6dmt2Z2JVSUdyNUtveDVxZ0F1YmtjSENuZXMrRndhdXFm?=
 =?utf-8?B?NEdYQkVwc2JxZVB0SXlpbFJWOFhVVm55bnRHT2NUSUVvOFZYTWc4Q2dLNHpN?=
 =?utf-8?B?aEdiQlhWc3huOUcza3ZoT0dWRGFZcFdjMUNiRHpTUFkwTTcwdDd1Y0dXd2d6?=
 =?utf-8?B?REJaWHZLRTUwZmh4Rjh3eXVKMENOd1VMaEJFTFNMQWRuRFBMYVpTa3ZwL1hG?=
 =?utf-8?B?T3Jsbm1VbGEzRnR1cit0a29VUlhxa0RNZTcwbHMxa2tzbklPN2x4RFQ1am4v?=
 =?utf-8?B?S3c2ZDdRNCtQMGNmeFVERU1KVWxvN3NzNjRrWFNpSjRFN1NOVnhPT1ZkZGtr?=
 =?utf-8?B?TzFUeWF0a0RkL1JKZEJraUl6ZW50SUNlRnI4WEhiRE9JUEI1OGNtaXJhaFI5?=
 =?utf-8?B?RzNCQmt5M2RRdEZ1Qkd3QlNpZ2dTSnpOUnB6U0hoNzZrdndLcDd0U3NTZk5w?=
 =?utf-8?B?MlFYMkE3MG5CQ0M5TWltRkFHbkNHRVdmbDlJL1NiV0k2ZFhTTVNKaU44b2ZC?=
 =?utf-8?B?N3NFSzBPKzFzTTVjZGJnaHJURHBEUGVVZUxQY2dDMndNU0YvYnNoTDZveCt3?=
 =?utf-8?Q?Hlg/ifXz95XtpVw8=3D?=
X-OriginatorOrg: oracle.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 0cc50ee9-6442-4fdb-dcef-08da27b658fa
X-MS-Exchange-CrossTenant-AuthSource: CO1PR10MB4722.namprd10.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Apr 2022 18:55:35.9212
 (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: INHnfeVwVX8MvjpC7Md6zGj88B9sp/lVUOl1EKuQgy74T9olpifY5eCT8loc+UtxHdqXPQT8y9Xyti6DSqNRuA+TSTf7uJ0qSrgt9tDdePg=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR10MB1909
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.486,18.0.858
 definitions=2022-04-26_05:2022-04-26,2022-04-26 signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 spamscore=0 adultscore=0
 mlxscore=0 bulkscore=0 suspectscore=0 malwarescore=0 mlxlogscore=999
 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000
 definitions=main-2204260120
X-Proofpoint-GUID: ryTm0f9QuZQ_dBMcZ5qvNxhCbiEH7qBR
X-Proofpoint-ORIG-GUID: ryTm0f9QuZQ_dBMcZ5qvNxhCbiEH7qBR
X-Spam-Status: No, score=-3.8 required=5.0 tests=BAYES_00,DKIM_SIGNED,
	DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,NICE_REPLY_A,RDNS_NONE,SPF_HELO_NONE
	autolearn=unavailable autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
	lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 4/26/22 13:38, Greg Kroah-Hartman wrote:
> On Tue, Apr 26, 2022 at 12:24:24PM -0500, John Donnelly wrote:
>> On 4/26/22 12:52 PM, Greg Kroah-Hartman wrote:
>>> On Tue, Apr 26, 2022 at 12:37:21PM -0500, john.p.donnelly@oracle.com wrote:
>>>> 76723ed1fb89 2021-12-01 | locking/rwsem: Make handoff bit handling more
>>>> consistent
>>>>
>>>> In Linux 5.15.y.
>>>
>>> That commit is in 5.15.6, released December 1, 2021.  And this just now
>>> shows up?  How is this related to 5.15.36-rc1?
>>
>> Hi,
>>
>> This  was briefly discussed in :
>>
>> Re: [PATCH v5] locking/rwsem: Make handoff bit handling more consistent
> 
> Have a lore.kernel.org link?  Why not continue it there?


https://lore.kernel.org/all/eae41639-cbca-4ea6-417f-f9b34a7138ea@oracle.com/

I tried and the thread is quiet.

> 
>> Additional testing shows the rwsem hang still exists.  It takes a 24hr fio
>> soak test to show up.
>>
>> It likely still exists in Linux 5.18.y too. We will be testing that in the
>> future as time permits.
> 
> Can you test 5.17.y also as there is no 5.18.y yet :)


We did.    It failed there too . ;-) We happened to have 5.18.rc2 in the 
work queue
> 
> thanks,
> 
> greg k-h