From: Paolo Bonzini <pbonzini@redhat.com>
To: Sergio Lopez <slp@redhat.com>, David Hildenbrand <david@redhat.com>
Cc: Pankaj Gupta <pagupta@redhat.com>,
ehabkost@redhat.com, kvm@vger.kernel.org, mst@redhat.com,
lersek@redhat.com, mtosatti@redhat.com, qemu-devel@nongnu.org,
kraxel@redhat.com, imammedo@redhat.com, philmd@redhat.com,
rth@twiddle.net
Subject: Re: [PATCH v4 0/8] Introduce the microvm machine type
Date: Wed, 25 Sep 2019 10:26:32 +0200 [thread overview]
Message-ID: <b361be48-d490-ac6a-4b54-d977c20539c0@redhat.com> (raw)
In-Reply-To: <87h850ssnb.fsf@redhat.com>
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On 25/09/19 10:10, Sergio Lopez wrote:
> That would be great. I'm also looking forward for virtio-mem (and an
> hypothetical virtio-cpu) to eventually gain hotplug capabilities in
> microvm.
I disagree with this. virtio is not a silver bullet (and in fact
perhaps it's just me but I've never understood the advantages of
virtio-mem over anything else).
If you want to add hotplug to microvm, you can reuse the existing code
for CPU and memory hotplug controllers, and write drivers for them in
Linux's drivers/platform. The drivers would basically do what the ACPI
AML tells the interpreter to do.
There is no reason to add the complexity of virtio to something as
low-level and deadlock-prone as CPU hotplug.
Paolo
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next prev parent reply other threads:[~2019-09-25 8:28 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-24 12:44 [PATCH v4 0/8] Introduce the microvm machine type Sergio Lopez
2019-09-24 12:44 ` [PATCH v4 1/8] hw/i386: Factorize PVH related functions Sergio Lopez
2019-09-24 13:18 ` Philippe Mathieu-Daudé
2019-09-25 6:03 ` Sergio Lopez
2019-09-25 8:36 ` Stefano Garzarella
2019-09-25 9:00 ` Sergio Lopez
2019-09-25 9:29 ` Stefano Garzarella
2019-09-24 12:44 ` [PATCH v4 2/8] hw/i386: Factorize e820 " Sergio Lopez
2019-09-24 13:20 ` Philippe Mathieu-Daudé
2019-09-24 14:12 ` Sergio Lopez
2019-09-24 12:44 ` [PATCH v4 3/8] hw/virtio: Factorize virtio-mmio headers Sergio Lopez
2019-09-24 12:44 ` [PATCH v4 4/8] hw/i386: split PCMachineState deriving X86MachineState from it Sergio Lopez
2019-09-24 13:40 ` Philippe Mathieu-Daudé
2019-09-25 15:39 ` Philippe Mathieu-Daudé
2019-09-24 12:44 ` [PATCH v4 5/8] fw_cfg: add "modify" functions for all types Sergio Lopez
2019-09-24 12:44 ` [PATCH v4 6/8] roms: add microvm-bios (qboot) as binary and git submodule Sergio Lopez
2019-09-24 13:31 ` Philippe Mathieu-Daudé
2019-09-25 6:09 ` Sergio Lopez
2019-09-24 12:44 ` [PATCH v4 7/8] docs/microvm.txt: document the new microvm machine type Sergio Lopez
2019-09-24 13:10 ` Paolo Bonzini
2019-09-25 5:49 ` Sergio Lopez
2019-09-25 7:57 ` Paolo Bonzini
2019-09-25 8:40 ` Sergio Lopez
2019-09-25 9:22 ` Paolo Bonzini
2019-09-25 11:04 ` Sergio Lopez
2019-09-25 11:20 ` Paolo Bonzini
2019-09-25 15:04 ` Sergio Lopez
2019-09-25 16:46 ` Paolo Bonzini
2019-09-26 6:23 ` Sergio Lopez
2019-09-26 8:58 ` Paolo Bonzini
2019-09-26 10:16 ` Sergio Lopez
2019-09-26 10:21 ` Paolo Bonzini
2019-09-26 12:12 ` Sergio Lopez
2019-09-25 5:06 ` Gerd Hoffmann
2019-09-25 7:33 ` Sergio Lopez
2019-09-25 8:51 ` Gerd Hoffmann
2019-09-24 12:44 ` [PATCH v4 8/8] hw/i386: Introduce the " Sergio Lopez
2019-09-24 13:12 ` Paolo Bonzini
2019-09-24 13:24 ` Michael S. Tsirkin
2019-09-24 13:34 ` Paolo Bonzini
2019-09-25 5:53 ` Sergio Lopez
2019-09-24 13:28 ` Michael S. Tsirkin
2019-09-25 5:59 ` Sergio Lopez
2019-10-01 8:56 ` Sergio Lopez
2019-09-25 15:40 ` Philippe Mathieu-Daudé
2019-09-26 6:34 ` Sergio Lopez
2019-09-26 8:59 ` Paolo Bonzini
2019-09-24 13:57 ` [PATCH v4 0/8] " Peter Maydell
2019-09-25 5:51 ` Sergio Lopez
2019-09-25 11:33 ` Philippe Mathieu-Daudé
2019-09-25 12:39 ` Peter Maydell
2019-09-25 7:41 ` David Hildenbrand
2019-09-25 7:58 ` Pankaj Gupta
2019-09-25 8:10 ` Sergio Lopez
2019-09-25 8:16 ` David Hildenbrand
2019-09-25 8:37 ` Pankaj Gupta
2019-09-25 8:26 ` Paolo Bonzini [this message]
2019-09-25 8:42 ` Sergio Lopez
2019-09-25 8:44 ` David Hildenbrand
2019-09-25 10:19 ` when to use virtio (was Re: [PATCH v4 0/8] Introduce the microvm machine type) Paolo Bonzini
2019-09-25 10:50 ` David Hildenbrand
2019-09-25 11:24 ` Paolo Bonzini
2019-09-25 11:32 ` David Hildenbrand
2019-09-25 9:12 ` [PATCH v4 0/8] Introduce the microvm machine type Gerd Hoffmann
2019-09-25 9:29 ` Paolo Bonzini
2019-09-25 9:47 ` David Hildenbrand
2019-09-26 7:48 ` Christian Borntraeger
2019-09-26 8:22 ` Sergio Lopez
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