[ewg] Hang in ib_mad when unergistering.

[Mike Heinz]

Tziporet,

I have only seen this in OFED to date.  I've been unable to reproduce the problem under controlled circumstances, and since it occurs very rarely, we only see it after the fact, usually in our own test facility.

At this point, code inspection seems to be the only way forward - I've been staring at this since before New Years, thought I had found a hole where the problem could occur, but then the problem occurred again last week, which is why I'm reaching out to ewg. I'm hoping that someone who knows this module better than I could suggest a scenario that might be triggering the problem.

From: Tziporet Koren [mailto:tziporet at dev.mellanox.co.il]
Sent: Sunday, May 02, 2010 4:05 PM
To: Mike Heinz
Cc: ewg at openfabrics.org
Subject: Re: [ewg] Hang in ib_mad when unergistering.

On 4/30/2010 4:04 PM, Mike Heinz wrote:
Using OFED 1.5.0 and 1.5.1 we've been seeing nodes occasionally hang when a process tries to disconnect from the umad interface. Can anyone suggest what might be causing this?

Does this happened in OFED only or also in mainline kernel?
If it's happaned in the kernel too I suggest you send this mail to the linx-rdma mailing list

Tziporet
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