Am 22.03.2013 um 15:48 hat Orit Wasserman geschrieben: > This will remove an unneeded copy of guest memory pages. > For the page header and device state we still copy the data to the > static buffer the other option is to allocate the memory on demand > which is more expensive. > > Signed-off-by: Orit Wasserman <owass...@redhat.com>
This seems to have killed savevm performance. I noticed that qemu-iotests case 007 took forever on my test box (882 seconds instead of something like 10 seconds). It can be reproduced by this script: export MALLOC_PERTURB_=11 qemu-img create -f qcow2 -o compat=1.1 test.qcow2 1M time qemu-system-x86_64 -nographic -hda $TEST_IMG -serial none -monitor stdio <<EOF savevm test quit EOF This used to take about 0.6s for me, after this patch it's around 10s. Kevin
