From: Hank Janssen <hjanssen@microsoft.com>
Date: Tue, 12 Oct 2010 17:45:23 +0000 (-0700)
Subject: staging: hv: Doubled ringbuffer size for Hyper-v network driver
X-Git-Tag: v2.6.37-rc1~60^2~3^2~146
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=99c8da0f4f4f1d14a8cd42b29dfa5625a1491662;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

staging: hv: Doubled ringbuffer size for Hyper-v network driver

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@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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)");