X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=PVE%2FQemuMigrate.pm;h=27cf7e36eb3706d3cc73cadad0f0ea436a7fa4dc;hb=2254ffcf8792a9b29957594945c181d2f38c17e7;hp=04a0776852fe755fba5d1ae8aec8780f1b7c20a7;hpb=d108cb1eb29b5629c95f776668de4f27007b0518;p=qemu-server.git

diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm
index 04a07768..27cf7e36 100644
--- a/PVE/QemuMigrate.pm
+++ b/PVE/QemuMigrate.pm
@@ -692,6 +692,8 @@ 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));
@@ -1032,4 +1034,9 @@ sub final_cleanup {
     # nothing to do
 }
 
+sub round_powerof2 {
+    return 1 if $_[0] < 2;
+    return 2 << int(log($_[0]-1)/log(2));
+}
+
 1;