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Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline fun
From: |
Avi Kivity |
Subject: |
Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function |
Date: |
Thu, 13 Aug 2009 12:28:52 +0300 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2 |
On 08/13/2009 09:15 AM, Michael S. Tsirkin wrote:
I wonder though if mmu notifiers can be used to make it transparent...
Maybe they can, but that decision belongs to KVM.
Avi, what do you think?
I don't see how mmu notifiers help. You can use mmu notifiers to sync
an external mmu to the linux pagetables, but that's not the case here.
I see the following options:
- mprotect() guest memory, trap faults, mprotect() back
Will work, but exceedingly slowly and wastefully
- add a generic user visible dirty bit tracking based on linux ptes
A lot of work, not sure if useful beyond kvm
- implement vhost dirty bit tracking
Not too difficult; not sure if it's worth the effort though
- reuse the kvm dirty bitmap
Not too difficult but introduces tight coupling between vhost and kvm
which might slow down development
- drop to userspace for live migration
Reuse qemu code, lose some performance
--
error compiling committee.c: too many arguments to function
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, (continued)
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Anthony Liguori, 2009/08/10
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Michael S. Tsirkin, 2009/08/10
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Anthony Liguori, 2009/08/10
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Michael S. Tsirkin, 2009/08/11
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Anthony Liguori, 2009/08/11
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Michael S. Tsirkin, 2009/08/11
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Anthony Liguori, 2009/08/11
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Michael S. Tsirkin, 2009/08/11
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Anthony Liguori, 2009/08/12
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Michael S. Tsirkin, 2009/08/13
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function,
Avi Kivity <=
- Re: [Qemu-devel] Re: [PATCH] qemu/virtio: move features to an inline function, Michael S. Tsirkin, 2009/08/13