From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: "Grumbach, Emmanuel" <emmanuel.grumbach@intel.com>
Cc: Thomas Meyer <thomas@m3y3r.de>,
"linux-rt-users@vger.kernel.org" <linux-rt-users@vger.kernel.org>,
"Berg, Johannes" <johannes.berg@intel.com>,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
Intel Linux Wireless <ilw@linux.intel.com>,
"tglx@linutronix.de" <tglx@linutronix.de>
Subject: Re: [Ilw] Re: Kernel panic in 3.10.10-rt7 (iwlwifi)
Date: Mon, 07 Oct 2013 09:33:11 +0200 [thread overview]
Message-ID: <525263B7.5090609@linutronix.de> (raw)
In-Reply-To: <0BA3FCBA62E2DC44AF3030971E174FB301DBC098@HASMSX103.ger.corp.intel.com>
On 10/06/2013 08:00 AM, Grumbach, Emmanuel wrote:
>
> We have a patch internally that goes into that direction, but one thing though.
Sounds great.
> If you still have a spinlock in the primary handler, wouldn't that sleep in a non-sleepable context? Forgive my -rt ignorance, but I understood that in -rt, all the spinlock go to sleep which basically mean that we can't take any spinlock in the primary irq handler so I am a bit confused here.
After my change there is no primary handler anymore, just the threaded
where you can take the (sleeping) spinlock.
Everything what you wrote is correct:
- you can't take a spinlock in the primary handler
- all spinlocks may sleep
Sebastian
prev parent reply other threads:[~2013-10-07 7:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2CD18B42-2489-4DF7-98D6-4D002329DC63@m3y3r.de>
2013-10-04 10:12 ` Kernel panic in 3.10.10-rt7 (iwlwifi) Sebastian Andrzej Siewior
2013-10-06 6:00 ` [Ilw] " Grumbach, Emmanuel
2013-10-06 6:00 ` Grumbach, Emmanuel
2013-10-07 7:33 ` Sebastian Andrzej Siewior [this message]
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