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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. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Alexander Graf <agraf@suse.de> |
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.. | ||
cpu-qom.h | ||
cpu.c | ||
cpu.h | ||
helper.c | ||
helper.h | ||
kvm.c | ||
machine.c | ||
Makefile.objs | ||
op_helper.c | ||
translate.c |