From: K. Y. Srinivasan Date: Tue, 15 Dec 2015 00:01:56 +0000 (-0800) Subject: Drivers: hv: vmbus: Force all channel messages to be delivered on CPU 0 X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b282e4c06fe89fc750fb26791c0bd7b25315973a;p=linux.git Drivers: hv: vmbus: Force all channel messages to be delivered on CPU 0 Force all channel messages to be delivered on CPU0. These messages are not performance critical and are used during the setup and teardown of the channel. Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 521f48ed188e4..3dc5a9c7fad6e 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -83,10 +83,13 @@ static int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, msg->interrupt_page = virt_to_phys(vmbus_connection.int_page); msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages[0]); msg->monitor_page2 = virt_to_phys(vmbus_connection.monitor_pages[1]); - if (version >= VERSION_WIN8_1) { - msg->target_vcpu = hv_context.vp_index[get_cpu()]; - put_cpu(); - } + /* + * We want all channel messages to be delivered on CPU 0. + * This has been the behavior pre-win8. This is not + * perf issue and having all channel messages delivered on CPU 0 + * would be ok. + */ + msg->target_vcpu = 0; /* * Add to list before we send the request since we may