Hello all! It should be fixed https://github.com/vatesfr/xen-orchestra/commit/72592a54d2225d5368a3410e4b3c19039f8e5df1 0 b-Nollet committed to vatesfr/xen-orchestra fix(backups): correctly update allowed_operations - temporary fix (#7924) Fixes https://xcp-ng.org/forum/post/81327 `allowed_operations` are currently not updated correctly when `blocked_operations` are modified, which causes backup jobs to remove `migrate_send` and `pool_migrate` from VM's `allowed_operations`. This commit fixes that, until `allowed_operations` updates correctly again.

Ah good news then

For those who have AMD EPYC 7003 (Zen 3 EPYCs), you may find in Processor settings in firmware Enhanced REP MOVSB/STOSB (ERMS) Fast Short REP MOVSB (FSRM) Which is apparently disabled by default. It could be interesting to enable them and see if it changes anything performance-wise. I am not sure if it's just for showing a flag, or if it changes anything in the CPU behavior though. You can also try REP-MOV/STOS Streaming to see it changes anything too.