qemu 2.11 need a power of 2 cache size.
"
Parameter 'xbzrle_cache_size' expects is invalid,
it should be bigger than target page size and a power of two
"
roundup to near power of 2 value
---
PVE/QemuMigrate.pm | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm
index 937a855..fcad17c 100644
--- a/PVE/QemuMigrate.pm
+++ b/PVE/QemuMigrate.pm
@@ -691,6 +691,8 @@ sub phase2 {
# set cachesize to 10% of the total memory
my $memory = $conf->{memory} || $defaults->{memory};
my $cachesize = int($memory * 1048576 / 10);
+ $cachesize = round_powerof2($cachesize);
+
$self->log('info', "set cachesize: $cachesize");
eval {
PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "migrate-set-cache-size",
value => int($cachesize));
@@ -1031,4 +1033,9 @@ sub final_cleanup {
# nothing to do
}
+sub round_powerof2 {
+ return 1 if $_[0] < 2;
+ return 2 << int(log($_[0]-1)/log(2));
+}
+
1;
--
2.11.0
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