linux-kernel - [PATCH 2/4] Drivers: hv: vmbus: do not mark HV_PCIE as perf

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Date:   Tue, 27 Mar 2018 15:01:02 -0700
From:   kys@...uxonhyperv.comi
To:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com,
        vkuznets@...hat.com, jasowang@...hat.com,
        leann.ogasawara@...onical.com, marcelo.cerri@...onical.com,
        sthemmin@...rosoft.com
Cc:     Dexuan Cui <decui@...rosoft.com>, stable@...r.kernel.org,
        "K . Y . Srinivasan" <kys@...rosoft.com>
Subject: [PATCH 2/4] Drivers: hv: vmbus: do not mark HV_PCIE as perf_device

From: Dexuan Cui <decui@...rosoft.com>

The pci-hyperv driver's channel callback hv_pci_onchannelcallback() is not
really a hot path, so we don't need to mark it as a perf_device, meaning
with this patch all HV_PCIE channels' target_cpu will be CPU0.

Signed-off-by: Dexuan Cui <decui@...rosoft.com>
Cc: stable@...r.kernel.org
Cc: Stephen Hemminger <sthemmin@...rosoft.com>
Cc: K. Y. Srinivasan <kys@...rosoft.com>
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
---
 drivers/hv/channel_mgmt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index c6d9d19bc04e..ecc2bd275a73 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -71,7 +71,7 @@ static const struct vmbus_device vmbus_devs[] = {
 	/* PCIE */
 	{ .dev_type = HV_PCIE,
 	  HV_PCIE_GUID,
-	  .perf_device = true,
+	  .perf_device = false,
 	},
 
 	/* Synthetic Frame Buffer */
-- 
2.15.1