linux-kernel - [PATCH 1/8] aoe: copy fallback timing information on destination failover

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Message-Id: <c6f755789c41f2ad86366683ab373ee358a22643.1353518444.git.ecashin@coraid.com>
Date:	Wed, 21 Nov 2012 19:54:14 -0500
From:	Ed Cashin <ecashin@...aid.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, ecashin@...aid.com
Subject:  [PATCH 1/8] aoe: copy fallback timing information on destination failover

The commit f3b8e07af7744cbb, "aoe: commands in retransmit queue
use new destination on failure", omits the copying of the
coarse-grained time when an AoE command was sent during the
failover from one destination MAC address on the AoE target to
another.

The coarse-grained timing is only used when the system time
changes or an unlikely length of time has passed since the
sending of the AoE command.  Users will not be impacted unless
their system clock is very inaccurate or something unusual (e.g.,
10 GbE link reset) happens during the period when the aoe driver
is handling the failure of a port on the AoE target.  Being
effected will mean that an AoE target could be considered "down"
too eagerly.

Signed-off-by: Ed Cashin <ecashin@...aid.com>
---
 drivers/block/aoe/aoecmd.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index d9bc6ff..d609c47 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -581,6 +581,7 @@ reassign_frame(struct list_head *pos)
 	nf->waited = 0;
 	nf->waited_total = f->waited_total;
 	nf->sent = f->sent;
+	nf->sent_jiffs = f->sent_jiffs;
 	f->skb = skb;
 	aoe_freetframe(f);
 	f->t->nout--;
-- 
1.7.1

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