From: "Manfred Spraul" <manfred@colorfullife.com>
To: "Pavel Machek" <pavel@suse.cz>
Cc: <geirt@powertech.no>, <linux-kernel@vger.kernel.org>
Subject: Re: Serial port latency
Date: Thu, 29 Mar 2001 09:58:31 +0200 [thread overview]
Message-ID: <000401c0b828$bbdf7380$5517fea9@local> (raw)
In-Reply-To: <000401c0b319517fea9@local> <20010325231013.A34@(none)>
From: "Pavel Machek" <pavel@suse.cz>
> > Is the computer otherwise idle?
> > I've seen one unexplainable report with atm problems that
disappeared
> > (!) if a kernel compile was running.
>
> I've seen similar bugs. If you hook something on schedule_tq and
forget
> to set current->need_resched, this is exactly what you get.
>
I'm running with a patch that printk's if cpu_idle() is called while a
softirq is pending.
If I access the floppy on my K6/200 every track triggers the check, and
sometimes the console blanking code triggers it.
What about creating a special cpu_is_idle() function that the idle
functions must call before sleeping?
--
Manfred
next prev parent reply other threads:[~2001-03-29 8:18 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <000401c0b319517fea9@local>
2001-03-25 23:10 ` Serial port latency Pavel Machek
2001-03-29 7:58 ` Manfred Spraul [this message]
2001-03-30 22:36 ` Pavel Machek
2001-03-31 22:09 ` Manfred Spraul
2001-04-03 23:07 ` softirq buggy [Re: Serial port latency] Pavel Machek
2001-04-04 21:18 ` Manfred Spraul
2001-04-06 12:00 ` Pavel Machek
2001-04-07 22:28 ` Manfred Spraul
2001-04-08 16:58 ` kuznet
2001-04-08 17:21 ` Manfred Spraul
2001-04-08 17:58 ` kuznet
2001-04-08 18:16 ` Manfred Spraul
2001-04-08 21:35 ` [PATCH] Re: softirq buggy Manfred Spraul
2001-04-09 8:42 ` Albert D. Cahalan
2001-04-09 13:50 ` Andrea Arcangeli
2001-04-09 15:26 ` Manfred Spraul
2001-04-09 17:31 ` Andrea Arcangeli
2001-04-09 17:48 ` kuznet
2001-04-09 18:26 ` Andrea Arcangeli
2001-04-10 0:37 ` Serial port latency Andrea Arcangeli
2001-03-22 21:45 Manfred Spraul
[not found] <Pine.LNX.4.20.0103221219410.3343-100000@linuxtaj.korpivaara.org>
2001-03-22 20:03 ` Geir Thomassen
2001-03-22 20:17 ` Trent Jarvi
-- strict thread matches above, loose matches on Subject: below --
2001-03-22 18:21 Geir Thomassen
2001-03-22 20:08 ` Theodore Tso
2001-03-22 20:32 ` Geir Thomassen
2001-03-22 20:55 ` Paul Fulghum
2001-03-22 22:44 ` Theodore Tso
[not found] ` <20010322141937.C22479@universal-fasteners.com>
2001-03-22 21:02 ` Geir Thomassen
2001-03-22 21:52 ` Jonathan Lundell
2001-03-22 23:25 ` Pavel Machek
2001-03-23 14:43 ` Geir Thomassen
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