linux-kernel - Re: Solid freezes with 2.6.25

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Message-ID: <20080513143917.GC17309@boogie.lpds.sztaki.hu>
Date:	Tue, 13 May 2008 16:39:29 +0200
From:	Gabor Gombas <gombasg@...aki.hu>
To:	Bernhard Walle <bwalle@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Solid freezes with 2.6.25

On Mon, May 12, 2008 at 02:21:46PM +0200, Bernhard Walle wrote:

> Well, can you try if that really not happens without
> CONFIG_HPET_EMULATE_RTC? The question is if that 64 interrupts per second really
> cause a machine hang ...

I'll try when I have a little time...

> However, the other question is why you get that RTC interrupts at all.
> I compared the old RTC implementation (drivers/char/rtc.c) with the new
> RTC interface (rtc-cmos.c) and the old implementation disables
> interrupts automatically when the device is closed in userspace while
> the new doesn't. I think the old one makes more sense, and so I think
> the following patch should be applied. Gabor, can you also test that
> patch ... it should fix your problem.

I'm running chrony which keeps the device open all the time:

chronyd 3433 root    6u   CHR              254,0      0t0   1971 /dev/rtc0

So I don't think the patch would make any difference, but I can
certainly try it.

Gabor

-- 
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     MTA SZTAKI Computer and Automation Research Institute
                Hungarian Academy of Sciences
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