Messages in this thread Patch in this message |  | | From | kys@exchange ... | Subject | [PATCH 4/6] Drivers: hv: util: Make hv_poll_channel() a little more efficient | Date | Sun, 30 Apr 2017 16:21:17 -0700 |
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From: K. Y. Srinivasan <kys@microsoft.com>
The current code unconditionally sends an IPI. If we are running on the correct CPU and are in interrupt level, we don't need an IPI. Make this adjustment.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> --- drivers/hv/hyperv_vmbus.h | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 6113e91..fa514be 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -411,6 +411,10 @@ static inline void hv_poll_channel(struct vmbus_channel *channel, if (!channel) return; + if (in_interrupt() && (channel->target_cpu == smp_processor_id())) { + cb(channel); + return; + } smp_call_function_single(channel->target_cpu, cb, channel, true); } -- 1.7.1
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