From: Hal Rosenstock <hal-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
To: Bob Ciotti <Bob.Ciotti-NSQ8wuThN14@public.gmane.org>
Cc: "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: watchdog timer
Date: Fri, 18 May 2012 09:07:50 -0400 [thread overview]
Message-ID: <4FB649A6.2060602@dev.mellanox.co.il> (raw)
In-Reply-To: <4FB5E69A.7010602-NSQ8wuThN14@public.gmane.org>
On 5/18/2012 2:05 AM, Bob Ciotti wrote:
>
>
> I'm seeing lots of these messages in SM log:
>
> May 17 22:36:04 947774 [DA234710] 0x01 -> log_trap_info: Received
> Generic Notice type:1 num:131 (Flow Control Update watchdog timer
> expired) Producer:2 (Switch) from LID:444 Port 5 TID:0x0000000000000025
>
> the referenced port is a switch to HCA link.
>
> I've seen this in cases where there was bad hardware. Spec says failure
> in flow control machine on other end. But lets assume hardware was good.
> When could this occur?
Do OperationalVLs match on both sides of the link ? Are you
using/configuring QoS ?
> Only in the case of FW bug?
I don't think flow control is performed by FW.
> Any tunable's that might impact this?
No IBA standard ones AFAIK. Who's the HCA vendor ?
-- Hal
> bob
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next prev parent reply other threads:[~2012-05-18 13:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-18 6:05 watchdog timer Bob Ciotti
[not found] ` <4FB5E69A.7010602-NSQ8wuThN14@public.gmane.org>
2012-05-18 13:07 ` Hal Rosenstock [this message]
[not found] ` <4FB649A6.2060602-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2012-05-18 14:35 ` Bob Ciotti
[not found] ` <4FB65E30.4070805-NSQ8wuThN14@public.gmane.org>
2012-05-18 15:10 ` Ira Weiny
[not found] ` <20120518081029.01004d2c.weiny2-i2BcT+NCU+M@public.gmane.org>
2012-05-18 15:27 ` Hal Rosenstock
[not found] ` <4FB66A6C.1060703-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2012-05-21 17:08 ` Ira Weiny
[not found] ` <20120521100831.a434152f.weiny2-i2BcT+NCU+M@public.gmane.org>
2012-05-22 0:51 ` Bob Ciotti
[not found] ` <4FBAE311.3080909-NSQ8wuThN14@public.gmane.org>
2012-05-22 15:55 ` Ira Weiny
2012-05-18 19:10 ` Bob Ciotti
2012-05-18 15:17 ` Hal Rosenstock
[not found] ` <4FB66817.6050106-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2012-05-18 16:49 ` Bob Ciotti
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