From: george anzinger <george@mvista.com>
To: Arjan van de Ven <arjanv@redhat.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/3] High-res-timers part 1 (core) take 20
Date: Sun, 08 Dec 2002 23:03:13 -0800 [thread overview]
Message-ID: <3DF44031.58A12F66@mvista.com> (raw)
In-Reply-To: <1039341009.1483.3.camel@laptop.fenrus.com>
Arjan van de Ven wrote:
>
> On Sun, 2002-12-08 at 08:46, george anzinger wrote:
>
> > +/*
> > + * Here is an SMP helping macro...
> > + */
> > +#ifdef CONFIG_SMP
> > +#define IF_SMP(a) a
> > +#else
> > +#define IF_SMP(a)
> > +#endif
>
> ehmmmmm personally I would consider any need of this ugly and evil
>
> > + IF_SMP(if (old_base && (new_base != old_base))
> > + spin_unlock(&old_base->lock);
> > + )
>
> Like here..... SMP dependent ifdef's of spinlock usage... shudder
>
Well it does seem like a waste to do spinlock ordering code
on a UP system...
--
George Anzinger george@mvista.com
High-res-timers:
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
next prev parent reply other threads:[~2002-12-09 6:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-08 7:46 george anzinger
2002-12-08 9:50 ` Arjan van de Ven
2002-12-09 7:03 ` george anzinger [this message]
2002-12-09 8:21 ` Robert Love
2002-12-09 8:53 ` Arjan van de Ven
2002-12-09 12:27 ` george anzinger
2002-12-09 12:34 ` Arjan van de Ven
2002-12-10 6:55 ` george anzinger
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