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From: kys@exchange.microsoft.com
To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
	devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com,
	vkuznets@redhat.com, jasowang@redhat.com,
	leann.ogasawara@canonical.com
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Subject: [PATCH 2/3] Drivers: hv: vmbus: Reduce the delay between retries in vmbus_post_msg()
Date: Fri,  1 Jul 2016 16:26:36 -0700	[thread overview]
Message-ID: <1467415597-7943-2-git-send-email-kys@exchange.microsoft.com> (raw)
In-Reply-To: <1467415597-7943-1-git-send-email-kys@exchange.microsoft.com>

From: K. Y. Srinivasan <kys@microsoft.com>

The current delay between retries is unnecessarily high and is negatively
affecting the time it takes to boot the system.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
---
 drivers/hv/connection.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index fcf8a02..78e6368 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -439,7 +439,7 @@ int vmbus_post_msg(void *buffer, size_t buflen)
 	union hv_connection_id conn_id;
 	int ret = 0;
 	int retries = 0;
-	u32 msec = 1;
+	u32 usec = 1;
 
 	conn_id.asu32 = 0;
 	conn_id.u.id = VMBUS_MESSAGE_CONNECTION_ID;
@@ -472,9 +472,9 @@ int vmbus_post_msg(void *buffer, size_t buflen)
 		}
 
 		retries++;
-		msleep(msec);
-		if (msec < 2048)
-			msec *= 2;
+		udelay(usec);
+		if (usec < 2048)
+			usec *= 2;
 	}
 	return ret;
 }
-- 
1.7.4.1

  reply	other threads:[~2016-07-01 21:43 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-01 23:25 [PATCH 0/3] Drivers: hv: vmbus: Miscellaneous adjustments kys
2016-07-01 23:26 ` [PATCH 1/3] Drivers: hv: vmbus: Enable explicit signaling policy for NIC channels kys
2016-07-01 23:26   ` kys [this message]
2016-07-01 23:26   ` [PATCH 3/3] Drivers: hv: vmbus: Implement a mechanism to tag the channel for low latency kys

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