[PATCH RESEND 25/27] Drivers: hv: vmbus: Force all channel messages to be delivered on CPU 0

[K. Y. Srinivasan]

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 
---
 drivers/hv/connection.c |   11 +++
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 521f48e..3dc5a9c 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
-- 
1.7.4.1

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[PATCH RESEND 25/27] Drivers: hv: vmbus: Force all channel messages to be delivered on CPU 0

[K. Y. Srinivasan]

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 
---
 drivers/hv/connection.c |   11 +++
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 521f48e..3dc5a9c 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
-- 
1.7.4.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/