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Fix locking in qmemman on Python 3.13 #629

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Merged
marmarek merged 2 commits into from
Oct 29, 2024
+12 −11
Merged

Fix locking in qmemman on Python 3.13 #629

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39329c8
Update Xen's memory overhead formula
marmarek Oct 20, 2024
2de9eb7
qmemman: always execute do_balance() under a lock
marmarek Oct 24, 2024
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13 changes: 6 additions & 7 deletions qubes/tools/qmemmand.py
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Original file line number Diff line number Diff line change
Expand Up @@ -128,20 +128,19 @@ def domain_list_changed(self, refresh_only=False):
self.watch_token_dict[i])
self.watch_token_dict.pop(i)
system_state.del_domain(i)

if not refresh_only:
try:
system_state.do_balance()
except: # pylint: disable=bare-except
self.log.exception('do_balance() failed')
except: # pylint: disable=bare-except
self.log.exception('Updating domain list failed')
finally:
if got_lock:
global_lock.release()
self.log.debug('global_lock released')

if not refresh_only:
try:
system_state.do_balance()
except: # pylint: disable=bare-except
self.log.exception('do_balance() failed')


def meminfo_changed(self, domain_id):
self.log.debug('meminfo_changed(domain_id={!r})'.format(domain_id))
untrusted_meminfo_key = self.handle.read(
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10 changes: 6 additions & 4 deletions qubes/vm/qubesvm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1761,10 +1761,12 @@ def request_memory(self, mem_required=None):
try:
mem_required_with_overhead = mem_required + MEM_OVERHEAD_BASE \
+ self.vcpus * MEM_OVERHEAD_PER_VCPU
if self.use_memory_hotplug:
# extra overhead to account future hotplug memory
# 1 page per 1MB of RAM, see libxl__get_required_paging_memory()
mem_required_with_overhead += self.maxmem * 4096
maxmem = self.maxmem if self.maxmem else self.memory
if self.virt_mode != "pv":
# extra overhead to account (possibly future hotplug) memory
# 2 pages per 1MB of RAM, see
# libxl__get_required_paging_memory()
mem_required_with_overhead += maxmem * 8192
got_memory = qmemman_client.request_memory(
mem_required_with_overhead)

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