From: u.kleine-koenig@pengutronix.de (Uwe Kleine-König)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] i.MX31 and i.MX35 : fix errate TLSbo65953 and ENGcm09472
Date: Tue, 5 Oct 2010 22:04:14 +0200 [thread overview]
Message-ID: <20101005200414.GA11737@pengutronix.de> (raw)
In-Reply-To: <4CAB83C2.3040301@eukrea.com>
Hello Eric,
>> Hmm, when the caches are off before entering wfi, does that mean that
>> all interrupt (and fiq) handlers run with the caches off, too? That's
>> very bad, isn't it?
>>
> If I understand well, this case happens only when they run after WFI
> which means cpuidle was called (and thus CPU activity was null for a
> certain amount of time, which explains why it's easier to reproduce the
> problem with tslib than with qtdemo which takes 100% CPU and don't let
> cpuidle to execute very often).
>
> That may seems bad, but I find this solution better than having an oops
> after a few IRQs which makes the CPU unusable for real life applications
> :-)
Ack, but it makes me think if the caches should be enabled in the irq
entry point, too.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-K?nig |
Industrial Linux Solutions | http://www.pengutronix.de/ |
next prev parent reply other threads:[~2010-10-05 20:04 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-02 13:55 I.MX35 GPIO IRQ + Preempt -> Oops Eric Bénard
2010-10-03 11:41 ` Russell King - ARM Linux
2010-10-03 15:25 ` Eric Bénard
2010-10-03 16:20 ` Russell King - ARM Linux
2010-10-03 17:15 ` Eric Bénard
2010-10-04 7:39 ` Uwe Kleine-König
2010-10-04 8:08 ` Eric Bénard
2010-10-04 12:07 ` Eric Bénard
2010-10-05 5:06 ` Marc Reilly
2010-10-05 7:28 ` Eric Bénard
2010-10-05 9:13 ` Eric Bénard
2010-10-05 9:25 ` [PATCH/RFC] i.MX31 and i.MX35 : fix errate TLSbo65953 and ENGcm09472 Eric Bénard
2010-10-05 9:45 ` Sascha Hauer
2010-10-05 12:00 ` [PATCH v2] " Eric Bénard
2010-10-05 18:33 ` Uwe Kleine-König
2010-10-05 19:31 ` Eric Bénard
2010-10-05 19:46 ` Uwe Kleine-König
2010-10-05 20:00 ` Eric Bénard
2010-10-05 20:04 ` Uwe Kleine-König [this message]
2010-10-05 20:27 ` Eric Bénard
2010-10-06 2:28 ` Nicolas Pitre
2010-10-06 11:09 ` Eric Bénard
2010-10-08 8:49 ` [PATCH v3] " Eric Bénard
2010-10-07 7:27 ` [PATCH v2] " Russell King - ARM Linux
2010-10-05 16:29 ` [PATCH/RFC] " Uwe Kleine-König
2010-10-05 16:48 ` Eric Bénard
2010-10-05 17:40 ` Uwe Kleine-König
2010-10-06 6:35 ` Daniel Mack
2010-10-06 7:03 ` Uwe Kleine-König
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