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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2012-06-15 05:10:30 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2012-07-10 18:27:33 +0200 |
| commit | fdec9918578ec38738ecf250fa2c2656a44796b5 (patch) | |
| tree | df492b5ddd37c0c69d2e63ca9bfa0196a7dbd7ac /hw/lm32_timer.c | |
| parent | 92336855975805d88c7979f53bc05c2d47abab04 (diff) | |
| download | focaccia-qemu-fdec9918578ec38738ecf250fa2c2656a44796b5.tar.gz focaccia-qemu-fdec9918578ec38738ecf250fa2c2656a44796b5.zip | |
s390: autodetect map private
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>
Diffstat (limited to 'hw/lm32_timer.c')
0 files changed, 0 insertions, 0 deletions