On 15.06.2012, at 17:10, Christian Borntraeger wrote: > By default qemu will use MAP_PRIVATE for guest pages. This will write > protect pages and thus break on s390 systems that dont support this feature. > Therefore qemu has a hack to always use MAP_SHARED for s390. But MAP_SHARED > has other problems (no dirty pages tracking, a lot more swap overhead etc.) > Newer systems allow the distinction via KVM_CAP_S390_COW. With this feature > qemu can use the standard qemu alloc if available, otherwise it will use > the old s390 hack.
Thanks, applied to s390-next. Alex
