From: Peter Maydell <peter.maydell@linaro.org>
To: Peter Xu <peterx@redhat.com>
Cc: "Akihiko Odaki" <odaki@rsg.ci.i.u-tokyo.ac.jp>,
qemu-devel@nongnu.org,
"Alex Williamson" <alex.williamson@redhat.com>,
"Cédric Le Goater" <clg@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Daniel P. Berrangé" <berrange@redhat.com>,
"Eduardo Habkost" <eduardo@habkost.net>,
"David Hildenbrand" <david@redhat.com>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Helge Deller" <deller@gmx.de>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"John Snow" <jsnow@redhat.com>,
qemu-block@nongnu.org, "Keith Busch" <kbusch@kernel.org>,
"Klaus Jensen" <its@irrelevant.dk>,
"Jesper Devantier" <foss@defmacro.it>,
"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
"Nicholas Piggin" <npiggin@gmail.com>,
qemu-ppc@nongnu.org, "John Levon" <john.levon@nutanix.com>,
"Thanos Makatos" <thanos.makatos@nutanix.com>,
"Yanan Wang" <wangyanan55@huawei.com>,
"BALATON Zoltan" <balaton@eik.bme.hu>,
"Jiaxun Yang" <jiaxun.yang@flygoat.com>,
"Daniel Henrique Barboza" <danielhb413@gmail.com>,
"David Gibson" <david@gibson.dropbear.id.au>,
"Harsh Prateek Bora" <harshpb@linux.ibm.com>,
"Alexey Kardashevskiy" <aik@ozlabs.ru>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Fabiano Rosas" <farosas@suse.de>,
"Thomas Huth" <thuth@redhat.com>,
"Laurent Vivier" <lvivier@redhat.com>,
"Dmitry Osipenko" <dmitry.osipenko@collabora.com>,
"Manos Pitsidianakis" <manos.pitsidianakis@linaro.org>
Subject: Re: [PATCH v2 3/3] memory: Stop piggybacking on memory region owners
Date: Fri, 26 Sep 2025 17:56:59 +0100 [thread overview]
Message-ID: <CAFEAcA-Y_5ea8D82CLBuBoHAVwKqBLjpO8Q6giAGW=fXScheUw@mail.gmail.com> (raw)
In-Reply-To: <CAFEAcA8x0mgrxepuKcPwLWfQF8H=giWH03+2sF9yzZ_5nk_dmw@mail.gmail.com>
On Fri, 26 Sept 2025 at 16:59, Peter Maydell <peter.maydell@linaro.org> wrote:
> I'm trying to repro the setup I had last year, but I can't
> figure out a setup where I can get hot-unplug to work:
> the "device-del" command documented in system/cpu-hotplug.html
> always fails with:
>
> "desc": "acpi: device unplug request for not supported device type:
> IvyBridge-IBRS-x86_64-cpu"
>
> Do you know how to get this working?
Turns out I needed to also add enough command line arguments
to get a guest to boot (which is a bit tricky when you don't
want to use the gui frontend because fontconfig et al are
full of leaks that clutter up the asan output). The error
message from device-del is extremely unhelpful here.
The command line I ended up with was
./build/x86-tgts-asan/qemu-system-x86_64 -vga std -display curses
-no-user-config -m 2048 -nodefaults -machine q35,accel=kvm,usb=off
-smp 1,maxcpus=2 -cpu IvyBridge-IBRS -qmp
unix:/tmp/qmp-sock,server=on,wait=off -cdrom
~/test-images/ubuntu-server-2404/ubuntu-24.04-live-server-amd64.iso
thanks
-- PMM
next prev parent reply other threads:[~2025-09-26 16:59 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-06 2:39 [PATCH v2 0/3] memory: Stop piggybacking on memory region owners Akihiko Odaki
2025-09-06 2:39 ` [PATCH v2 1/3] qom: Do not finalize twice Akihiko Odaki
2025-09-23 9:27 ` Paolo Bonzini
2025-09-06 2:39 ` [PATCH v2 2/3] virtio-gpu-virgl: Add virtio-gpu-virgl-hostmem-region type Akihiko Odaki
2025-09-06 2:39 ` [PATCH v2 3/3] memory: Stop piggybacking on memory region owners Akihiko Odaki
2025-09-10 21:45 ` Peter Xu
2025-09-11 3:40 ` Akihiko Odaki
2025-09-11 22:26 ` Peter Xu
2025-09-18 12:04 ` Akihiko Odaki
2025-09-24 21:14 ` Peter Xu
2025-09-25 9:03 ` Peter Maydell
2025-09-25 20:05 ` Peter Xu
2025-09-26 9:09 ` Peter Maydell
2025-09-26 15:16 ` Peter Xu
2025-09-26 15:59 ` Peter Maydell
2025-09-26 16:56 ` Peter Maydell [this message]
2025-09-26 17:10 ` Peter Xu
2025-09-29 12:45 ` Peter Maydell
2025-09-29 14:37 ` Peter Xu
2025-09-29 14:43 ` Peter Maydell
2025-09-23 8:41 ` Paolo Bonzini
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