From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: anthony.perard@citrix.com, xen-devel@lists.xenproject.org
Cc: stefano.stabellini@eu.citrix.com
Subject: xl vcpu-set <guest> <nr> does not work properly.
Date: Wed, 4 Dec 2013 14:57:24 -0500 [thread overview]
Message-ID: <20131204195723.GB3833@pegasus.dumpdata.com> (raw)
When I try this with the "SeaBIOS" QEMU it does not hotplug
all of the CPUs and it complains about the existing ones:
-bash-4.1# xl vcpu-list
Name ID VCPU CPU State Time(s) CPU
Affinity
Domain-0 0 0 1 -b- 87.1 any
cpu
Domain-0 0 1 2 -b- 14.4 any
cpu
Domain-0 0 2 3 -b- 11.0 any
cpu
Domain-0 0 3 0 r-- 13.7 any
cpu
latest 7 0 3 -b- 10.9 any
cpu
latest 7 1 0 -b- 1.7 any
cpu
latest 7 2 - --p 0.0 any
cpu
latest 7 3 - --p 0.0 any
cpu
-bash-4.1# xl vcpu-set 7 4
libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an
error message from QMP server: Unable to add CPU: 0, it already exists
libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an
error message from QMP server: Unable to add CPU: 1, it already exists
-bash-4.1# xl vcpu-list
Name ID VCPU CPU State Time(s) CPU
Affinity
Domain-0 0 0 0 -b- 87.4 any
cpu
Domain-0 0 1 3 -b- 14.6 any
cpu
Domain-0 0 2 2 -b- 11.1 any
cpu
Domain-0 0 3 1 r-- 13.7 any
cpu
latest 7 0 2 -b- 11.7 any
cpu
latest 7 1 1 -b- 1.7 any
cpu
latest 7 2 3 -b- 0.0 any
cpu
And sure enough - in the guest it only added one CPU:
[ 85.720139] CPU2 has been hot-added
[ 85.726409] installing Xen timer for CPU 2
[ 85.735674] smpboot: Booting Node 0 Processor 2 APIC 0x4
[ 85.755080] cpu 2 spinlock event irq 86
[ 85.763671] microcode: CPU2 sig=0x206a7, pf=0x2, revision=0x28
[ 85.770669] Will online and init hotplugged CPU: 2
Perhaps the SeaBIOS/new qemu needs variants of:
f62079c piix4acpi, xen, hotplug: Fix race with ACPI AML code and hotplug.
e28e062 piix4acpi, xen: Clarify that the qemu_set_irq calls just do an IRQ pulse.
2133c38 piix4acpi, xen, vcpu hotplug: Split the notification from the changes
Thanks!
next reply other threads:[~2013-12-04 19:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-04 19:57 Konrad Rzeszutek Wilk [this message]
2013-12-05 12:27 ` xl vcpu-set <guest> <nr> does not work properly Anthony PERARD
2013-12-09 17:10 ` Anthony PERARD
2013-12-09 17:20 ` Ian Campbell
2013-12-09 21:52 ` Konrad Rzeszutek Wilk
2013-12-10 14:46 ` Anthony PERARD
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