From b282e4c06fe89fc750fb26791c0bd7b25315973a Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Mon, 14 Dec 2015 16:01:56 -0800 Subject: [PATCH] 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 --- drivers/hv/connection.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 521f48ed188e..3dc5a9c7fad6 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 -- 2.20.1