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Date: Mon, 22 Feb 2010 13:23:33 +0100
Message-ID: <520f0cf11002220423u64daf89dxa6a4249522adabee@mail.gmail.com>
Subject: Re: [ANNOUNCE] 2.6.33-rc8-rt1
From: John Kacur <jkacur@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
       rt-users <linux-rt-users@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
       Steven Rostedt <rostedt@goodmis.org>,
       Peter Zijlstra <peterz@infradead.org>, Carsten Emde <ce@ceag.ch>,
       Clark Williams <williams@redhat.com>,
       Frank Rowand <frank.rowand@am.sony.com>,
       Robin Gareus <robin@gareus.org>, Gregory Haskins <ghaskins@novell.com>,
       Philippe Reynes <philippe.reynes@isismpp.fr>,
       Fernando Lopez-Lezcano <nando@ccrma.stanford.edu>,
       Will Schmidt <will_schmidt@vnet.ibm.com>,
       Darren Hart <dvhltc@us.ibm.com>, Jan Blunck <jblunck@suse.de>,
       Sven-Thorsten Dietrich <sdietrich@novell.com>,
       Jon Masters <jcm@redhat.com>, Mark Knecht <markknecht@gmail.com>,
       Nick Piggin <nickpiggin@yahoo.com.au>
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On Mon, Feb 22, 2010 at 12:28 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> On Mon, 22 Feb 2010, John Kacur wrote:
>> On Mon, Feb 22, 2010 at 12:24 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
>> > We are zooming in, but there is still a way to go!
>> >
>>
>> Woohoo! More -rt fun.
>>
>> Unfortunately, I can't log in on my T500 with this kernel though.
>> The following shows-up on my serial console.
>> ------------[ cut here ]------------
>> WARNING: at /home/jkacur/rt.linux.git/net/mac80211/rx.c:2467 ieee80211_rx+0x4c/0
>> x721 [mac80211]()
>
> Fix below. Thanks,
>
> ? ?tglx
> ----
> diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
> index 82a30c1..e735c17 100644
> --- a/net/mac80211/rx.c
> +++ b/net/mac80211/rx.c
> @@ -2464,7 +2464,7 @@ void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
> ? ? ? ?struct ieee80211_supported_band *sband;
> ? ? ? ?struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
>
> - ? ? ? WARN_ON_ONCE(softirq_count() == 0);
> + ? ? ? WARN_ON_ONCE_NONRT(softirq_count() == 0);
>
> ? ? ? ?if (WARN_ON(status->band < 0 ||
> ? ? ? ? ? ? ? ? ? ?status->band >= IEEE80211_NUM_BANDS))
> --

Thanks Thomas

That patch fixes the symptom I reported, but unfortunately, I still
can't log-in to my laptop without the machine freezing.
Not sure why, investigating.

John
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