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X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: eQMXeudDJJSCbREdPO/CioXPo3aPh2QiFEUJLp2aKJUSmu+8BzlyGDmkeAeSQaMzViYwcuhdXToIDH8SVB6qczps/4DyjYJhoBO/oJhlOGM= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN4PR10MB5576 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-19_14,2024-09-19_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 bulkscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 phishscore=0 malwarescore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2408220000 definitions=main-2409190111 X-Proofpoint-GUID: v5MGujXWxfVxnohx3sttuxlBprkglymJ X-Proofpoint-ORIG-GUID: v5MGujXWxfVxnohx3sttuxlBprkglymJ Hello David, I hope my last week email answered your interrogations about:     - retrieving the valid data from the lost hugepage     - the need of smaller pages to replace a failed large page     - the interaction of memory error and VM migration     - the non-symmetrical access to a poisoned memory area after a recovery       Qemu would be able to continue to access the still valid data       location of the formerly poisoned hugepage, but any other entity       mapping the large page would not be allowed to use the location. I understand that this last item _is_ some kind of "inconsistency". So if I want to make sure that a "shared" memory region (used for vhost-user processes, vfio or ivshmem) is not recovered, how can I identify what region(s) of a guest memory could be used for such a shared location ? Is there a way for qemu to identify the memory locations that have been shared ? Could you please let me know if there is an entry point I should consider ? Thanks in advance for your feedback. William.