Describing here a problem encountered. noteworthy is previously there were hugepages configured with the VM running and these were subsequently removed. Proxmox did not catch this imho.
Booting a VM where the CPU configuration had pdpe1gb flag enabled this appeared to have resulted in initially a sequence of
pvx kernel: [27088.148955] watchdog: BUG: soft lockup - CPU#15 stuck for 22s! [pvesr:689846]
followed by
pvx kernel: [27088.148955] watchdog: BUG: soft lockup - CPU#15 stuck for 22s! [pvesr:689846]
pvx kernel: [27100.116955] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [vzdump:689884]
Booting a VM where the CPU configuration had pdpe1gb flag enabled this appeared to have resulted in initially a sequence of
pvx kernel: [27088.148955] watchdog: BUG: soft lockup - CPU#15 stuck for 22s! [pvesr:689846]
followed by
pvx kernel: [27088.148955] watchdog: BUG: soft lockup - CPU#15 stuck for 22s! [pvesr:689846]
pvx kernel: [27100.116955] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [vzdump:689884]