From: Alexandre Derumier <aderumier@odiso.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH qemu-server 0/2] close #2949: add virtio-mem support
Date: Mon, 7 Mar 2022 12:35:59 +0100 [thread overview]
Message-ID: <20220307113601.512862-1-aderumier@odiso.com> (raw)
This patch add virtio-mem support, through a new maxmemory option.
a 4GB static memory is needed for DMA+boot memory, as this memory
is almost always un-unpluggeable.
1 virtio-mem pci device is setup for each numa node on pci.4 bridge
virtio-mem use a fixed blocksize with 32k max blocksize,
so blocksize is computed from the maxmemory/32000 with a minimum of
2MB to map THP.
(lower blocksize = more chance to unplug memory).
Tested with debian11 guest with kernel 5.10.
more info about virtio-mem:
https://virtio-mem.gitlab.io/
Alexandre Derumier (2):
add virtio-mem support
tests: add virtio-mem tests
PVE/QemuServer.pm | 9 +-
PVE/QemuServer/Memory.pm | 130 +++++++++++++++-----
PVE/QemuServer/PCI.pm | 8 ++
test/cfg2cmd/simple-virtio-mem-big.conf | 12 ++
test/cfg2cmd/simple-virtio-mem-big.conf.cmd | 59 +++++++++
test/cfg2cmd/simple-virtio-mem.conf | 13 ++
test/cfg2cmd/simple-virtio-mem.conf.cmd | 31 +++++
7 files changed, 233 insertions(+), 29 deletions(-)
create mode 100644 test/cfg2cmd/simple-virtio-mem-big.conf
create mode 100644 test/cfg2cmd/simple-virtio-mem-big.conf.cmd
create mode 100644 test/cfg2cmd/simple-virtio-mem.conf
create mode 100644 test/cfg2cmd/simple-virtio-mem.conf.cmd
--
2.30.2
next reply other threads:[~2022-03-07 11:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-07 11:35 Alexandre Derumier [this message]
2022-03-07 11:36 ` [pve-devel] [PATCH qemu-server 1/2] " Alexandre Derumier
2022-03-07 11:36 ` [pve-devel] [PATCH qemu-server 2/2] tests: add virtio-mem tests Alexandre Derumier
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