From: Borislav Petkov <bp@alien8.de>
To: Ingo Molnar <mingo@kernel.org>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
x86-ml <x86@kernel.org>, lkml <linux-kernel@vger.kernel.org>,
tiwai@suse.de, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: irq 16: nobody cared
Date: Mon, 22 Apr 2013 11:18:47 +0200 [thread overview]
Message-ID: <20130422091847.GB4637@pd.tnic> (raw)
In-Reply-To: <20130422080136.GA7080@gmail.com>
On Mon, Apr 22, 2013 at 10:01:36AM +0200, Ingo Molnar wrote:
> Hm, this really smells like a workaround: treating the symptom, not
> the cause.
Well, I just tested Takashi's add missing synchronize_irq() to the
suspend path of snd_hda_intel and it doesn't help.
So it could be an issue with this driver or only this hw/driver can
exacerbate RCU this much to trigger the spurious irq machinery.
> How can an increase in grace-periods break drivers and suspend? Do we
> understand exactly what happens there?
I'd rather look into Paul's direction here. :)
> If we do, can we fix that instead of tweaking the RCU timeouts?
Well, I was under the impression yesterday that we actually want
to switch to expedited grace periods for suspend/resume *anyway*,
regardless of drivers.
Paul?
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2013-04-22 9:18 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-20 18:53 Borislav Petkov
2013-04-20 23:52 ` Paul E. McKenney
2013-04-21 10:34 ` Borislav Petkov
2013-04-21 16:30 ` Paul E. McKenney
2013-04-21 16:56 ` Borislav Petkov
2013-04-21 18:10 ` Borislav Petkov
2013-04-21 18:56 ` Paul E. McKenney
2013-04-21 19:06 ` Borislav Petkov
2013-04-21 20:34 ` Paul E. McKenney
2013-04-21 20:51 ` Borislav Petkov
2013-04-21 21:42 ` Borislav Petkov
2013-04-21 22:00 ` Paul E. McKenney
2013-04-21 22:12 ` Borislav Petkov
2013-04-22 8:01 ` Ingo Molnar
2013-04-22 9:18 ` Borislav Petkov [this message]
2013-04-22 13:16 ` Paul E. McKenney
2013-04-21 18:47 ` Paul E. McKenney
2013-04-22 8:32 ` Takashi Iwai
2013-04-22 9:13 ` Borislav Petkov
2013-04-22 9:19 ` Takashi Iwai
2013-04-22 10:06 ` Borislav Petkov
2013-04-22 11:33 ` Takashi Iwai
2013-04-22 13:56 ` Borislav Petkov
2013-04-22 12:56 ` Thomas Gleixner
2013-04-22 14:23 ` Borislav Petkov
2013-04-22 14:44 ` Paul E. McKenney
2013-04-22 21:33 ` Borislav Petkov
2013-04-22 22:07 ` Paul E. McKenney
2013-04-23 14:10 ` Thomas Gleixner
2013-04-23 14:34 ` Borislav Petkov
2013-04-23 15:01 ` Paul E. McKenney
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