From: Richard Hirst <rhirst@linuxcare.com>
To: Ryan Bradetich <rbradetich@uswest.net>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] keyboard_tasklet bug?
Date: Thu, 29 Nov 2001 12:22:05 +0000 [thread overview]
Message-ID: <20011129122205.Z13057@linuxcare.com> (raw)
In-Reply-To: <1007019927.14588.9.camel@beavis>; from rbradetich@uswest.net on Thu, Nov 29, 2001 at 12:45:26AM -0700
On Thu, Nov 29, 2001 at 12:45:26AM -0700, Ryan Bradetich wrote:
> Hello parisc-linux hackers,
>
> I have spent the last couple of evenings exploring new (to me anyways)
> parts of the kernel tracking down a SMP hang on my C200+. What I found
> appears to be a more generic bug, so I'm posting it here for ideas on
> how to fix it, or for someone to explain to me why this isn't a bug :)
Sounds very similar to the problem I fixed with the led tasklet
#ifdef CONFIG_CHASSIS_LCD_LED
/* Only schedule the led tasklet on cpu 0, and only if it
* is enabled.
*/
if (cpu == 0 && !atomic_read(&led_tasklet.count))
tasklet_schedule(&led_tasklet);
#endif
where I added the atomic_read() call. In that case it wasn't hanging
my (UP) machine, but it left ksoftirqd_CPU0 at 100% CPU.
Richard
prev parent reply other threads:[~2001-11-29 12:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-29 7:45 [parisc-linux] keyboard_tasklet bug? Ryan Bradetich
2001-11-29 12:22 ` Richard Hirst [this message]
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