On Mon, 2012-07-16 at 04:53 +0000, Pandarathil, Vijaymohan R wrote: > Hi Toshi, > > Did some basic KVM guest cpu hotplug testing of this patch over your OST patchset along with fixes in qemu-kvm for guest cpu hotplug. > > Vijay > > virsh # vcpucount vmb91g1 > maximum config 4 > maximum live 4 > current config 4 > current live 4 > > virsh # setvcpus vmb91g1 3 > > virsh # vcpucount vmb91g1 > maximum config 4 > maximum live 4 > current config 4 > current live 3 > > virsh # setvcpus vmb91g1 4 > > virsh # vcpucount vmb91g1 > maximum config 4 > maximum live 4 > current config 4 > current live 4 > > virsh # setvcpus vmb91g1 2 > > virsh # vcpucount vmb91g1 > maximum config 4 > maximum live 4 > current config 4 > current live 2 > > The guest cpu counts (as shown by lscpu in the guest) also changes. > > > Tested-by: Vijay Mohan Pandarathil<vijaymohan.pandarathil@xxxxxx> Hi Vijay, Great! Thanks for the testing! -Toshi > > > -----Original Message----- > From: Kani, Toshimitsu > Sent: Friday, June 29, 2012 7:51 AM > To: lenb@xxxxxxxxxx; linux-acpi@xxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx; Kani, Toshimitsu > Subject: [PATCH] ACPI: Add ACPI CPU hot-remove support > > Added CPU hot-remove support through an ACPI eject notification. > It calls acpi_bus_hot_remove_device(), which shares the same code > path with the sysfs eject operation. acpi_os_hotplug_execute() > serializes hot-remove operations between ACPI hot-remove and sysfs > eject requests. > > Signed-off-by: Toshi Kani <toshi.kani@xxxxxx> > > --- > This patch applies on top of the patchset below. > > [PATCH v6 0/6] ACPI: Add _OST support for ACPI hotplug > http://marc.info/?l=linux-acpi&m=134074381322973&w=2 > > --- > drivers/acpi/processor_driver.c | 27 +++++++++++++++++---------- > 1 files changed, 17 insertions(+), 10 deletions(-) > > diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c > index f9fa1b2..a6f6bde 100644 > --- a/drivers/acpi/processor_driver.c > +++ b/drivers/acpi/processor_driver.c > @@ -699,8 +699,8 @@ int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) > static void acpi_processor_hotplug_notify(acpi_handle handle, > u32 event, void *data) > { > - struct acpi_processor *pr; > struct acpi_device *device = NULL; > + struct acpi_eject_event *ej_event = NULL; > u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ > int result; > > @@ -732,20 +732,27 @@ static void acpi_processor_hotplug_notify(acpi_handle handle, > "received ACPI_NOTIFY_EJECT_REQUEST\n")); > > if (acpi_bus_get_device(handle, &device)) { > - printk(KERN_ERR PREFIX > - "Device don't exist, dropping EJECT\n"); > + pr_err(PREFIX "Device don't exist, dropping EJECT\n"); > break; > } > - pr = acpi_driver_data(device); > - if (!pr) { > - printk(KERN_ERR PREFIX > - "Driver data is NULL, dropping EJECT\n"); > + if (!acpi_driver_data(device)) { > + pr_err(PREFIX "Driver data is NULL, dropping EJECT\n"); > break; > } > > - /* REVISIT: update when eject is supported */ > - ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; > - break; > + ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); > + if (!ej_event) { > + pr_err(PREFIX "No memory, dropping EJECT\n"); > + break; > + } > + > + ej_event->handle = handle; > + ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; > + acpi_os_hotplug_execute(acpi_bus_hot_remove_device, > + (void *)ej_event); > + > + /* eject is performed asynchronously */ > + return; > > default: > ACPI_DEBUG_PRINT((ACPI_DB_INFO, -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
