51 lines
2.0 KiB
Diff
51 lines
2.0 KiB
Diff
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From 3433e6920a4aaa2177f3503ef08256a58f866b33 Mon Sep 17 00:00:00 2001
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From: Wei Huang <wei@redhat.com>
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Date: Thu, 17 Jan 2019 17:33:56 +0000
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Subject: [PATCH 6/7] aarch64: Set virt-rhel8.0.0 max_cpus to 512
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RH-Author: Wei Huang <wei@redhat.com>
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Message-id: <20190117173357.31514-3-wei@redhat.com>
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Patchwork-id: 84038
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O-Subject: [RHEL8 qemu-kvm PATCH v3 2/3] aarch64: Set virt-rhel8.0.0 max_cpus to 512
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Bugzilla: 1656504
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RH-Acked-by: Andrew Jones <drjones@redhat.com>
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RH-Acked-by: Auger Eric <eric.auger@redhat.com>
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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This patch increases max_cpus of virt-rhel8.0.0 from 255 to 512.
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This decision is made due to a recent trend of ARM servers Red Hat
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received. Currently Red Hat has HPE Apollo machines that contains 256
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cpu cores. It is reasonable to expect that we will see new machines
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with > 256 cores very soon. We have verified this patch partially with a
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256-vcpu VM on Apollo and expect 512 vcpus will work as well.
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Signed-off-by: Wei Huang <wei@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/arm/virt.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/hw/arm/virt.c b/hw/arm/virt.c
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index 156721a..21965e4 100644
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--- a/hw/arm/virt.c
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+++ b/hw/arm/virt.c
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@@ -2063,11 +2063,11 @@ static void rhel_machine_class_init(ObjectClass *oc, void *data)
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mc->family = "virt-rhel-Z";
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mc->init = machvirt_init;
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- /* Start max_cpus at the maximum QEMU supports. We'll further restrict
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- * it later in machvirt_init, where we have more information about the
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+ /* Start with max_cpus set to 512, which is the maximum supported by KVM.
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+ * The value may be reduced later when we have more information about the
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* configuration of the particular instance.
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*/
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- mc->max_cpus = 255;
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+ mc->max_cpus = 512;
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mc->block_default_type = IF_VIRTIO;
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mc->no_cdrom = 1;
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mc->pci_allow_0_address = true;
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--
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1.8.3.1
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