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Date:      Mon, 24 Feb 2020 08:16:38 -0600
From:      Jason Bacon <bacon4000@gmail.com>
To:        freebsd-infiniband@freebsd.org
Subject:   Re: [PATCH]: ipoib with mlx4 initialisation ordering
Message-ID:  <3684a21c-e26c-abcf-b443-aa0ddccc1338@gmail.com>
In-Reply-To: <9d76992b-6ba4-2419-61ff-5035aa45e597@selasky.org>
References:  <20200222004838.GA22659@moira.hest-guild.se> <9d76992b-6ba4-2419-61ff-5035aa45e597@selasky.org>

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On 2020-02-24 03:05, Hans Petter Selasky wrote:
> On 2020-02-22 01:48, Andreas Kempe wrote:
>> This issue can be remedied by changing the initialisation of the IPoIB
>> module to happen after the mlx4 driver is initialised. By doing this,
>> all multicast groups will be cleaned up before the ib_multicast client
>> is destroyed.
>
> Hi Andreas,
>
> Are you sure it is not the module exit that should be ordered instead?
>
>  module_exit(ipoib_cleanup_module);
>
> Because from the description this issue happen on shutdown and not load.
>
> I'm currently trying to reproduce the issue.
>
> Dropping freebsd-net @
>
> --HPS
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Side-note: I was seeing the same symptom occasionally on our CentOS 
clusters for years.  I frequently had to go to the data center and check 
on hung systems after routine updates, which would often be stuck at 
"Unloading IB modules".  I wonder if it was a similar issue.

-- 
Earth is a beta site.




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