On win7 (ws2008 R2) and beyond, we have the notion of having dedicated interrupts on a per-channel basis. When a channel has a dedicated interrupt assigned, there is no need to set the interrupt bit in the shared page. Implement this optimization.
Signed-off-by: K. Y. Srinivasan <[email protected]> Reviewed-by: Haiyang Zhang <[email protected]> --- drivers/hv/connection.c | 13 ++++++++----- 1 files changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 56b14e5..114050d 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -383,10 +383,13 @@ int vmbus_post_msg(void *buffer, size_t buflen) int vmbus_set_event(struct vmbus_channel *channel) { u32 child_relid = channel->offermsg.child_relid; - /* Each u32 represents 32 channels */ - sync_set_bit(child_relid & 31, - (unsigned long *)vmbus_connection.send_int_page + - (child_relid >> 5)); - return hv_signal_event(hv_context.signal_event_param); + if (!channel->is_dedicated_interrupt) { + /* Each u32 represents 32 channels */ + sync_set_bit(child_relid & 31, + (unsigned long *)vmbus_connection.send_int_page + + (child_relid >> 5)); + } + + return hv_signal_event(channel->sig_event); } -- 1.7.4.1 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
