Re: [Qemu-devel] [PATCH] target-i386: enable kvm_pv_unhalt by default

2017-09-13 Thread Eduardo Habkost
On Wed, Sep 13, 2017 at 04:39:58PM +0200, Alexander Graf wrote: > Commit f010bc643a (target-i386: add feature kvm_pv_unhalt) introduced the > kvm_pv_unhalt feature but didn't enable it by default. > > Without kvm_pv_unhalt we see a measurable degradation in scheduling > performance, so enabling it

[Qemu-devel] [PATCH] target-i386: enable kvm_pv_unhalt by default

2017-09-13 Thread Alexander Graf
Commit f010bc643a (target-i386: add feature kvm_pv_unhalt) introduced the kvm_pv_unhalt feature but didn't enable it by default. Without kvm_pv_unhalt we see a measurable degradation in scheduling performance, so enabling it by default does make sense IMHO. This patch just flips it to default to o