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From bb722e9effd08ea9d64091914c6f09d061017cad Mon Sep 17 00:00:00 2001
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From: David Hildenbrand <david@redhat.com>
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Date: Tue, 9 Jan 2018 10:32:52 +0100
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Subject: [PATCH 02/12] redhat: globally limit the maximum number of CPUs
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RH-Author: David Hildenbrand <david@redhat.com>
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Message-id: <20180109103253.24517-2-david@redhat.com>
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Patchwork-id: 78531
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O-Subject: [RHEL-7.5 qemu-kvm-ma PATCH v2 1/2] redhat: globally limit the maximum number of CPUs
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Bugzilla: 1527449
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RH-Acked-by: David Gibson <dgibson@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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Upstream-status: n/a
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For RHEL, we support 240, for RHV up to 384 VCPUs. Let's limit this
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globally instead of fixing up all machines. This way, we can easily
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change (increase) the product specific levels later.
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Signed-off-by: David Hildenbrand <david@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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vl.c | 23 +++++++++++++++++++++++
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1 file changed, 23 insertions(+)
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diff --git a/vl.c b/vl.c
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index bef5ae3..90b542f 100644
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--- a/vl.c
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+++ b/vl.c
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@@ -135,6 +135,12 @@ int main(int argc, char **argv)
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#define MAX_VIRTIO_CONSOLES 1
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#define MAX_SCLP_CONSOLES 1
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+#if defined(CONFIG_RHV)
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+#define RHEL_MAX_CPUS 384
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+#else
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+#define RHEL_MAX_CPUS 240
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+#endif
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+
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static const char *data_dir[16];
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static int data_dir_idx;
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const char *bios_name = NULL;
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@@ -1501,6 +1507,20 @@ MachineClass *find_default_machine(void)
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return mc;
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}
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+/* Maximum number of CPUs limited for Red Hat Enterprise Linux */
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+static void limit_max_cpus_in_machines(void)
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+{
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+ GSList *el, *machines = object_class_get_list(TYPE_MACHINE, false);
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+
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+ for (el = machines; el; el = el->next) {
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+ MachineClass *mc = el->data;
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+
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+ if (mc->max_cpus > RHEL_MAX_CPUS) {
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+ mc->max_cpus = RHEL_MAX_CPUS;
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+ }
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+ }
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+}
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+
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MachineInfoList *qmp_query_machines(Error **errp)
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{
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GSList *el, *machines = object_class_get_list(TYPE_MACHINE, false);
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@@ -4130,6 +4150,9 @@ int main(int argc, char **argv, char **envp)
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replay_configure(icount_opts);
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+ /* Maximum number of CPUs limited for Red Hat Enterprise Linux */
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+ limit_max_cpus_in_machines();
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+
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machine_class = select_machine();
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set_memory_options(&ram_slots, &maxram_size, machine_class);
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--
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1.8.3.1
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