From: "Manfred Spraul" <manfred@colorfullife.com>
To: <kuznet@ms2.inr.ac.ru>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: softirq buggy [Re: Serial port latency]
Date: Sun, 8 Apr 2001 19:21:54 +0200 [thread overview]
Message-ID: <001301c0c050$69f69be0$5517fea9@local> (raw)
In-Reply-To: <200104081658.UAA15180@ms2.inr.ac.ru>
From: <kuznet@ms2.inr.ac.ru>
> Hello!
>
> > + if (softirq_active(smp_processor_id()) &
softirq_mask(smp_processor_id())) {
> > + do_softirq();
> > + return 0;
>
> BTW you may delete do_softirq()... schedule() will call this.
>
But with a huge overhead. I'd prefer to call it directly from within the
idle functions, the overhead of schedule is IMHO too high.
>
> > + *
> > + * Isn't this identical to default_idle with the 'no-hlt' boot
> > + * option? <manfred@colorfullife.com>
>
> Seeems, it is not. need_resched=-1 avoids useless IPIs.
>
I already wondered why need_resched is set to -1 ;-)
I'll remove that comment and repost the patch.
--
Manfred
next prev parent reply other threads:[~2001-04-08 17:21 UTC|newest]
Thread overview: 20+ 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
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 [this message]
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
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