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Thunderbird/102.12.0 Subject: Re: [5.15-stable PATCH 0/2] Copy-on-write hwpoison recovery Content-Language: en-US To: Greg KH Cc: stable@vger.kernel.org, tony.luck@intel.com, dan.j.williams@intel.com, naoya.horiguchi@nec.com, linmiaohe@huawei.com, glider@google.com References: <20230615015255.1260473-1-jane.chu@oracle.com> <2023061926-copied-glowworm-8cee@gregkh> <2023062047-confront-spleen-a9a5@gregkh> From: Jane Chu In-Reply-To: <2023062047-confront-spleen-a9a5@gregkh> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SA0PR11CA0135.namprd11.prod.outlook.com (2603:10b6:806:131::20) To SJ0PR10MB4429.namprd10.prod.outlook.com (2603:10b6:a03:2d1::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ0PR10MB4429:EE_|CH2PR10MB4342:EE_ X-MS-Office365-Filtering-Correlation-Id: 4ce23cc3-8a3d-442b-0d2c-08db71c7a953 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-CrossTenant-Network-Message-Id: 4ce23cc3-8a3d-442b-0d2c-08db71c7a953 X-MS-Exchange-CrossTenant-AuthSource: SJ0PR10MB4429.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jun 2023 19:50:55.7877 (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: CJx+RophSOTKxJWls1id6p1f7MOlzd7RkQtsFoVhWQSs+F6vCGxnnPBfstwuTGVMhPdfxnsalEtkkkRXJLkbIw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR10MB4342 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-20_14,2023-06-16_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=810 adultscore=0 spamscore=0 bulkscore=0 malwarescore=0 phishscore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306200179 X-Proofpoint-GUID: bxaZNat-VqkpL9J1C-4zGZgBMiUKrabZ X-Proofpoint-ORIG-GUID: bxaZNat-VqkpL9J1C-4zGZgBMiUKrabZ Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On 6/20/2023 11:42 AM, Greg KH wrote: > On Tue, Jun 20, 2023 at 11:36:13AM -0700, Jane Chu wrote: >> Hi, Greg, >> >> On 6/19/2023 1:28 AM, Greg KH wrote: >>> On Wed, Jun 14, 2023 at 07:52:53PM -0600, Jane Chu wrote: >>>> I was able to reproduce crash on 5.15.y kernel during COW, and >>>> when the grandchild process attempts a write to a private page >>>> inherited from the child process and the private page contains >>>> a memory uncorrectable error. The way to reproduce is described >>>> in Tony's patch, using his ras-tools/einj_mem_uc. >>>> And the patch series fixed the panic issue in 5.15.y. >>> >>> But you are skipping 6.1.y, which is not ok as it would cause >>> regressions when you upgrade. >>> >>> I'll drop this from my review queue now, please provide working >>> backports for this and newer releases, and I'll be glad to take them. >>> >> >> Thanks for the guidance, will do. >> To confirm, you're looking for backport to both 6.1.y and 5.15.y, and >> nothing else, correct? Just curious, why 6.1.y in particular? > > > If you don't think it needs to go to any kernels older than 5.15.y, that would > be fine. > > And as for 6.1.y, look at the front page of www.kernel.org, it shows the > active kernel versions. We can't apply a change to an older kernel tree > only because if you upgrade to a newer one (i.e. from 5.15.y to 6.1.y), > you would have a regression which we don't ever want. > Got it, thanks! -jane > thanks, > > greg k-h