From: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
To: Roland Dreier <roland-BHEL68pLQRGGvPXPguhicg@public.gmane.org>
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Fwd: circular lockdep problem
Date: Tue, 24 Jul 2012 14:44:25 -0500 [thread overview]
Message-ID: <500EFB19.2090809@opengridcomputing.com> (raw)
In-Reply-To: <CAL1RGDV9gGYuX6WBcjWeWUAeFo3A-jZsAX86XPwbf8cttDO4Tg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On 07/24/2012 12:06 PM, Roland Dreier wrote:
> [resending because I forgot to reply-all]
>
> On Tue, Jul 24, 2012 at 9:39 AM, Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org> wrote:
>> Can anyone help me understand how I can resolve this? Its saying there is
>> some circular dependency problem with the cxgb4 uld_mutex, the networking
>> rtnl_mutex, and ib_core's device_mutex. I can't decipher the stuff below
>> though. It only seems to happen when there is a cxgb4 and ipoib device
>> present.
> Do you have a real IB HCA installed too?
Yes.
> I suspect this is a lockdep false positive where it is mixing together
> lock ordering from the IB - IPoIB adapter and the cxgb4 netdev,
> and seeing a deadlock that can't really happen.
>
> I'll take a look, although I don't have a cxgb4 device so I can't test
> directly. Would you be able to test a patch if I come up with one?
Sure!
Steve.
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prev parent reply other threads:[~2012-07-24 19:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-24 16:39 circular lockdep problem Steve Wise
[not found] ` <500ECFCD.1040403-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2012-07-24 16:49 ` Benoit Hudzia
[not found] ` <CAL1RGDUaUN-X2Ju=SdHf-b8Kjh5K+wZ36aMQNZkn5xsG8yLrUQ@mail.gmail.com>
[not found] ` <CAL1RGDUaUN-X2Ju=SdHf-b8Kjh5K+wZ36aMQNZkn5xsG8yLrUQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-07-24 17:06 ` Fwd: " Roland Dreier
[not found] ` <CAL1RGDV9gGYuX6WBcjWeWUAeFo3A-jZsAX86XPwbf8cttDO4Tg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-07-24 19:44 ` Steve Wise [this message]
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