From: Paolo Bonzini <pbonzini@redhat.com>
To: Eduardo Habkost <ehabkost@redhat.com>, Waiman Long <longman@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>,
"Michael S. Tsirkin" <mst@redhat.com>,
libvir-list@redhat.com, qemu-devel@nongnu.org,
Igor Mammedov <imammedo@redhat.com>
Subject: Re: [Qemu-devel] [libvirt] [PATCH 0/7] x86: Rework KVM-defaults compat code, enable kvm_pv_unhalt by default
Date: Tue, 7 Nov 2017 12:21:16 +0100 [thread overview]
Message-ID: <eea713f7-2b5e-0233-ebd2-6610d344d2d0@redhat.com> (raw)
In-Reply-To: <20171013235644.GE3246@localhost.localdomain>
On 14/10/2017 01:56, Eduardo Habkost wrote:
> Now, I don't know yet what's the best default for a guest that
> has CONFIG_PARAVIRT_SPINLOCK when it sees a host that supports
> kvm_pv_unhalt. But I'm arguing that it's the guest
> responsibility to choose what to do when it detects such a host,
> instead of expecting the host to hide features from the guest.
> The guest and the guest administrator have more information to
> choose what's best.
>
> In other words, if exposing kvm_pv_unhalt on CPUID really makes
> some guests behave poorly, can we fix the guests instead?
Waiman just did it. :)
https://marc.info/?l=linux-kernel&m=150972337909996
Paolo
next prev parent reply other threads:[~2017-11-07 11:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-06 21:52 [Qemu-devel] [PATCH 0/7] x86: Rework KVM-defaults compat code, enable kvm_pv_unhalt by default Eduardo Habkost
2017-10-06 21:52 ` [Qemu-devel] [PATCH 1/7] qemu-doc: Document minimum kernel version for KVM in x86_64 Eduardo Habkost
2017-10-09 13:40 ` Paolo Bonzini
2017-10-10 15:33 ` Eduardo Habkost
2017-10-06 21:52 ` [Qemu-devel] [PATCH 2/7] target/i386: x86_cpu_expand_feature() helper Eduardo Habkost
2017-10-06 21:52 ` [Qemu-devel] [PATCH 3/7] target/i386: Use global variables to control KVM defaults Eduardo Habkost
2017-10-06 21:52 ` [Qemu-devel] [PATCH 4/7] kvm: Define KVM_FEAT_* even if CONFIG_KVM is not defined Eduardo Habkost
2017-10-06 21:52 ` [Qemu-devel] [PATCH 5/7] target/i386: Handle kvm_auto_* compat in x86_cpu_expand_features() Eduardo Habkost
2017-10-06 21:52 ` [Qemu-devel] [PATCH 6/7] pc: Use compat_props to control KVM defaults compatibility Eduardo Habkost
2017-10-06 21:52 ` [Qemu-devel] [PATCH 7/7] target/i386: Enable kvm_pv_unhalt by default Eduardo Habkost
2017-10-09 14:40 ` Paolo Bonzini
2017-10-09 14:43 ` Alexander Graf
2017-10-09 13:39 ` [Qemu-devel] [PATCH 0/7] x86: Rework KVM-defaults compat code, enable " Paolo Bonzini
2017-10-09 15:15 ` Waiman Long
2017-10-09 15:47 ` Paolo Bonzini
2017-10-10 15:50 ` Eduardo Habkost
2017-10-10 18:07 ` Waiman Long
2017-10-10 19:41 ` Eduardo Habkost
2017-10-11 20:19 ` Waiman Long
2017-10-13 19:01 ` Eduardo Habkost
2017-10-13 20:58 ` Waiman Long
2017-10-13 23:56 ` Eduardo Habkost
2017-11-07 11:21 ` Paolo Bonzini [this message]
2017-11-08 20:07 ` [Qemu-devel] [libvirt] " Eduardo Habkost
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