### Qubes OS release
4.2
### Summary
The "VMs stuck at 400mb minimum memory" …[issue](https://forum.qubes-os.org/t/fedora-41-template-update-on-20-12-2024-makes-fedora-lag-severely/30915/15) and [related issue](https://github.com/QubesOS/qubes-issues/issues/9663) is appearing for me on ALL VMs and all templates -- fedora-41, whonix-17, debian-12, debian-11, fedora-39, etc.
Rebooting the machine fixes the issue temporarily. The conditions causing the issue to re-appear are unclear: starting lots of templates or running a backup seems to trigger it.
Letting the machine run overnight sometimes results in the affected VMs growing memory to the proper size.
Setting a VM's minimum memory to a larger value (increasing it from 400MB to 800MB) while the VM is running does not change the memory assigned to that VM.
Reinstalling selinux in fedora-39 with `sudo dnf reinstall $(rpm -qa --qf "%{NAME}\n" | grep selinux | tr '\n' ' ')` fixes the issue temporarily (the template VM memory size responds to settings changes in dom0). However, the memory size stops responding once the fedora-39 templateVM is rebooted. After reboot, the fedora-39 template is stuck at 400MB memory again. I have not tried doing this with other VMs.
A similar error appeared while I was using 4.1, but less persistently. When it appeared under 4.1, the issue could be resolved by starting or shutting down a dispVM.
This related error appears in the dom0 journal:
```
Jun 16 09:47:29 dom0 qmemman.systemstate[1752]: dom '36' didnt react to memory request (holds 4276317184, requested balloon down to 4229774786)
```
This error keeps appearing in the dom0 journal, and seems like it may be related:
```
Jun 16 09:48:23 dom0 qmemman.systemstate[1752]: Xen free = 4551286325 too small for satisfy assignments! assigned_but_unused=4539549486, domdict={'0': {'memory_current': 4278194176, 'memory_actual': 4294967296, 'memory_maximum': 4294967296, 'mem_used': 2919075840, 'id': '0', 'last_target': 4294967296, 'use_hotplug': False, 'no_progress': False, 'slow_memset_react': False}, '1': {'memory_current': 402698240, 'memory_actual': 402698240, 'memory_maximum': 419430400, 'mem_used': None, 'id': '1', 'last_target': 402653184, 'use_hotplug': False, 'no_progress': False, 'slow_memset_react': False}, '2': {'memory_current': 150994944, 'memory_actual': 150994944, 'memory_maximum': 150994944, 'mem_used': None, 'id': '2', 'last_target': 150994944, 'use_hotplug': False, 'no_progress': False, 'slow_memset_react': False}, '6': {'memory_current': 33603584, 'memory_actual': 33603584, 'memory_maximum': 33554432, 'mem_used': None, 'id': '6', 'last_target': 33554432, 'use_hotplug': False, 'no_progress': False, 'slow_memset_react': False}, '7': {'memory_current': 2160074752, 'memory_actual': 2160074752, 'memory_maximum': 4194304000, 'mem_used': 553455616, 'id': '7', 'last_target': 2104816490, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '13': {'memory_current': 2400657408, 'memory_actual': 2417371155, 'memory_maximum': 4194304000, 'mem_used': 648224768, 'id': '13', 'last_target': 2417371155, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '14': {'memory_current': 4169392128, 'memory_actual': 4186107404, 'memory_maximum': 4194304000, 'mem_used': 1213317120, 'id': '14', 'last_target': 4186107404, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '15': {'memory_current': 2850582528, 'memory_actual': 2867294451, 'memory_maximum': 4194304000, 'mem_used': 780218368, 'id': '15', 'last_target': 2867294451, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '36': {'memory_current': 293433344, 'memory_actual': 4276317184, 'memory_maximum': 4276317184, 'mem_used': 1217527808, 'id': '36', 'last_target': 4229774786, 'use_hotplug': False, 'no_progress': True, 'slow_memset_react': False}, '41': {'memory_current': 2549542912, 'memory_actual': 2566256314, 'memory_maximum': 4194304000, 'mem_used': 681357312, 'id': '41', 'last_target': 2566256314, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '47': {'memory_current': 5784690688, 'memory_actual': 5801406001, 'memory_maximum': 8388608000, 'mem_used': 1743781888, 'id': '47', 'last_target': 5801406001, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '51': {'memory_current': 402698240, 'memory_actual': 402698240, 'memory_maximum': 419430400, 'mem_used': None, 'id': '51', 'last_target': 402653184, 'use_hotplug': False, 'no_progress': False, 'slow_memset_react': False}, '52': {'memory_current': 150994944, 'memory_actual': 150994944, 'memory_maximum': 150994944, 'mem_used': None, 'id': '52', 'last_target': 150994944, 'use_hotplug': False, 'no_progress': False, 'slow_memset_react': False}, '53': {'memory_current': 1933123584, 'memory_actual': 1949836579, 'memory_maximum': 4194304000, 'mem_used': 478924800, 'id': '53', 'last_target': 1949836579, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '54': {'memory_current': 2829127680, 'memory_actual': 2845841617, 'memory_maximum': 4194304000, 'mem_used': 773173248, 'id': '54', 'last_target': 2845841617, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '55': {'memory_current': 1882533888, 'memory_actual': 1899247803, 'memory_maximum': 8388608000, 'mem_used': 462311424, 'id': '55', 'last_target': 1899247803, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '56': {'memory_current': 1891926016, 'memory_actual': 1908639653, 'memory_maximum': 4194304000, 'mem_used': 465395712, 'id': '56', 'last_target': 1908639653, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '57': {'memory_current': 2883207168, 'memory_actual': 2899922715, 'memory_maximum': 4194304000, 'mem_used': 790933504, 'id': '57', 'last_target': 2899922715, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '58': {'memory_current': 419495936, 'memory_actual': 419495936, 'memory_maximum': 4194304000, 'mem_used': None, 'id': '58', 'last_target': 419430400, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}, '59': {'memory_current': 135168, 'memory_actual': 419430400, 'memory_maximum': 42352000285, 'mem_used': None, 'id': '59', 'last_target': 419430400, 'use_hotplug': True, 'no_progress': False, 'slow_memset_react': False}}
```