linux-kernel - [PATCH 1/1] staging: hv: Doubled ringbuffer size for Hyper-v network driver

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Message-ID: <4CB49EB3.6090000@sailtheuniverse.com>
Date:	Tue, 12 Oct 2010 10:45:23 -0700
From:	Hank Janssen <hjanssen@...ltheuniverse.com>
To:	hjanssen@...rosoft.com, Haiyang Zhang <haiyangz@...rosoft.com>,
	gregkh@...e.de, virtualization@...ts.osdl.org,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] staging: hv: Doubled ringbuffer size for Hyper-v network
 driver


From: Hank Janssen <hjanssen@...rosoft.com>

Double the default network ringsize buffer for Hyper-V network driver.
In very heavily loaded systems the there is a chance you run out of
ringbuffer space and error out.

Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
Signed-off-by: Hank Janssen <hjanssen@...rosoft.com>

---
 drivers/staging/hv/netvsc_drv.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index 56e1157..45e082a 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -59,7 +59,7 @@ struct netvsc_driver_context {
 /* Need this many pages to handle worst case fragmented packet */
 #define PACKET_PAGES_HIWATER  (MAX_SKB_FRAGS + 2)
 
-static int ring_size = roundup_pow_of_two(2*MAX_SKB_FRAGS+1);
+static int ring_size = 128;
 module_param(ring_size, int, S_IRUGO);
 MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
 
-- 
1.6.0.2


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