|
 |
a83cc2 |
From b5dab6e678d9b53359b3a915421114258e803cad Mon Sep 17 00:00:00 2001
|
|
|
a83cc2 |
From: Andrew Jones <drjones@redhat.com>
|
|
|
a83cc2 |
Date: Tue, 21 Jan 2014 10:46:52 +0100
|
|
|
a83cc2 |
Subject: globally limit the maximum number of CPUs
|
|
|
a83cc2 |
|
|
|
a83cc2 |
We now globally limit the number of VCPUs.
|
|
|
a83cc2 |
Especially, there is no way one can specify more than
|
|
|
a83cc2 |
max_cpus VCPUs for a VM.
|
|
|
a83cc2 |
|
|
|
a83cc2 |
This allows us the restore the ppc max_cpus limitation to the upstream
|
|
|
a83cc2 |
default and minimize the ppc hack in kvm-all.c.
|
|
|
a83cc2 |
|
|
|
a83cc2 |
Signed-off-by: David Hildenbrand <david@redhat.com>
|
|
|
a83cc2 |
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
|
a83cc2 |
Signed-off-by: Danilo Cesar Lemes de Paula <ddepaula@redhat.com>
|
|
|
a83cc2 |
---
|
|
|
a83cc2 |
accel/kvm/kvm-all.c | 12 ++++++++++++
|
|
|
a83cc2 |
1 file changed, 12 insertions(+)
|
|
|
a83cc2 |
|
|
|
a83cc2 |
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
|
|
|
a83cc2 |
index b6d9f92f15..70a94ba76d 100644
|
|
|
a83cc2 |
--- a/accel/kvm/kvm-all.c
|
|
|
a83cc2 |
+++ b/accel/kvm/kvm-all.c
|
|
|
a83cc2 |
@@ -2095,6 +2095,18 @@ static int kvm_init(MachineState *ms)
|
|
|
a83cc2 |
soft_vcpus_limit = kvm_recommended_vcpus(s);
|
|
|
a83cc2 |
hard_vcpus_limit = kvm_max_vcpus(s);
|
|
|
a83cc2 |
|
|
|
a83cc2 |
+#ifdef HOST_PPC64
|
|
|
a83cc2 |
+ /*
|
|
|
a83cc2 |
+ * On POWER, the kernel advertises a soft limit based on the
|
|
|
a83cc2 |
+ * number of CPU threads on the host. We want to allow exceeding
|
|
|
a83cc2 |
+ * this for testing purposes, so we don't want to set hard limit
|
|
|
a83cc2 |
+ * to soft limit as on x86.
|
|
|
a83cc2 |
+ */
|
|
|
a83cc2 |
+#else
|
|
|
a83cc2 |
+ /* RHEL doesn't support nr_vcpus > soft_vcpus_limit */
|
|
|
a83cc2 |
+ hard_vcpus_limit = soft_vcpus_limit;
|
|
|
a83cc2 |
+#endif
|
|
|
a83cc2 |
+
|
|
|
a83cc2 |
while (nc->name) {
|
|
|
a83cc2 |
if (nc->num > soft_vcpus_limit) {
|
|
|
a83cc2 |
warn_report("Number of %s cpus requested (%d) exceeds "
|
|
|
a83cc2 |
--
|
|
|
a83cc2 |
2.27.0
|
|
|
a83cc2 |
|