fix #6907: memory: allow multi-digit host nodes with hugepages

When hugepages are enabled, each custom NUMA node must be bound to a
single host node. This was checked with a regex that only accepts a
single digit, so any host node from 10 upwards was rejected with a
misleading "more than 1 hostnode value" error, making hugepages
unusable on hosts with more than ten NUMA nodes.

Accept any single node number instead. Ranges and lists are still
rejected as before.

Signed-off-by: Michal Fox <me@dualfroz.com>
Reviewed-by: Max R. Carrara <m.carrara@proxmox.com>
Tested-by: Max R. Carrara <m.carrara@proxmox.com>
Link: https://lore.proxmox.com/20260926084115.7-1-me@dualfroz.com
[TL: add a multi-digit host node case to the memory tests]
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

src/PVE/QemuServer/Memory.pm

@@ -649,7 +649,7 @@ sub hugepages_topology {
         my $hostnodes = print_numa_hostnodes($hostnodelists);
 
         die "more than 1 hostnode value in numa node is not supported when hugepages are enabled"
-            if $hostnodes !~ m/^(\d)$/;
+            if $hostnodes !~ m/^\d+$/;
         my $hugepages_size = hugepages_size($conf, $numa_memory);
         $hugepages_topology->{$hugepages_size}->{$hostnodes} +=
             hugepages_nr($numa_memory, $hugepages_size);

src/test/run_memory_tests.pl

@@ -17,6 +17,7 @@ $memory_module->mock('hugepages_chunk_size_supported', sub { return 1; });
 my $tests = [
     ['0', '0', 1],
     ['9', '9', 1],
+    ['10', '10', 1],
     ['0;1', '0,1', 0],
     ['0;10', '0,10', 0],
     ['0;1;10', '0,1,10', 0],