linux-kernel - [PATCH 2.6.18-rc4] aoe [10/14]: module parameter for device timeout

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Date:	Wed, 20 Sep 2006 14:36:50 -0400
From:	"Ed L. Cashin" <ecashin@...aid.com>
To:	linux-kernel@...r.kernel.org
Cc:	ecashin@...aid.com, Greg K-H <greg@...ah.com>
Subject: [PATCH 2.6.18-rc4] aoe [10/14]: module parameter for device timeout

The aoe_deadsecs module parameter sets the number of seconds that
elapse before a nonresponsive AoE device is marked as dead.

This is runtime settable in sysfs or settable with a module load or
kernel boot parameter.

Signed-off-by: "Ed L. Cashin" <ecashin@...aid.com>
---

diff -upr 2.6.18-rc4-orig/drivers/block/aoe/aoecmd.c 2.6.18-rc4-aoe/drivers/block/aoe/aoecmd.c
--- 2.6.18-rc4-orig/drivers/block/aoe/aoecmd.c	2006-09-20 14:29:36.000000000 -0400
+++ 2.6.18-rc4-aoe/drivers/block/aoe/aoecmd.c	2006-09-20 14:29:36.000000000 -0400
@@ -15,7 +15,10 @@
 #define TIMERTICK (HZ / 10)
 #define MINTIMER (2 * TIMERTICK)
 #define MAXTIMER (HZ << 1)
-#define MAXWAIT (60 * 3)	/* After MAXWAIT seconds, give up and fail dev */
+
+static int aoe_deadsecs = 60 * 3;
+module_param(aoe_deadsecs, int, 0644);
+MODULE_PARM_DESC(aoe_deadsecs, "After aoe_deadsecs seconds, give up and fail dev.");
 
 struct sk_buff *
 new_skb(ulong len)
@@ -373,7 +376,7 @@ rexmit_timer(ulong vp)
 		if (f->tag != FREETAG && tsince(f->tag) >= timeout) {
 			n = f->waited += timeout;
 			n /= HZ;
-			if (n > MAXWAIT) { /* waited too long.  device failure. */
+			if (n > aoe_deadsecs) { /* waited too long for response */
 				aoedev_downdev(d);
 				break;
 			}


-- 
  "Ed L. Cashin" <ecashin@...aid.com>
-
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