Subject: Re: [BUG] kernel 2.6.15.4: soft lockup detected on CPU#0!
From: Lee Revell <rlrevell@joe-job.com>
To: Folkert van Heusden <folkert@vanheusden.com>
Cc: Charles-Edouard Ruault <ce@ruault.com>, linux-kernel@vger.kernel.org
In-Reply-To: <20060215150710.GN30182@vanheusden.com>
References: <43EF8388.10202@ruault.com>
	 <20060214114102.GC20975@vanheusden.com>
	 <1139934749.11659.97.camel@mindpipe>
	 <20060215150710.GN30182@vanheusden.com>
Content-Type: text/plain
Date: Wed, 15 Feb 2006 13:19:52 -0500
Message-Id: <1140027592.2733.38.camel@mindpipe>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 751
Lines: 21

On Wed, 2006-02-15 at 16:07 +0100, Folkert van Heusden wrote:
> 
> So it seems it switches back to pio somewhere in time.
> 
> But on the other hand: shouldn't pio run ok as well without softlockup
> errors? 

AFAICT in PIO mode if a huge IO request is submitted and/or the device
is slow to respond there's nothing to prevent us spending a long time in
the IDE driver.

IIRC this can't be made preemptible due to data corruption issues on
some hardware.  Maybe we should touch the watchdog in there.

Lee

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/