From: Dave Jones <davej@codemonkey.org.uk>
To: Thomas Schlichter <schlicht@uni-mannheim.de>
Cc: Hugh Dickins <hugh@veritas.com>, Andrew Morton <akpm@digeo.com>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH][2.5] replace flush_map() in arch/i386/mm/pageattr.c w ith flush_tlb_all()
Date: Fri, 21 Feb 2003 14:20:39 +0000 [thread overview]
Message-ID: <20030221142039.GA21532@codemonkey.org.uk> (raw)
In-Reply-To: <200302211342.19007.schlicht@uni-mannheim.de>
On Fri, Feb 21, 2003 at 01:42:12PM +0100, Thomas Schlichter wrote:
> > No. All that does is make sure that the cpu you start out on is
> > flushed, once or twice, and the cpu you end up on may be missed.
> > Use preempt_disable and preempt_enable.
>
> Oh, you are right! I think I am totally stupid this morning...!
> Now finally I hope this is the correct patch...
That would appear to do what you want, but its an ugly construct to
be repeating everywhere that wants to call a function on all CPUs.
It would probably clean things up a lot if we had a function to do..
static inline void on_each_cpu(void *func)
{
#ifdef CONFIG_SMP
preempt_disable();
smp_call_function(func, NULL, 1, 1);
func(NULL);
preempt_enable();
#else
func(NULL);
#endif
}
Bluesmoke and agpgart could both use this to cleanup some mess,
and no doubt there are others
Comments?
Dave
--
| Dave Jones. http://www.codemonkey.org.uk
next prev parent reply other threads:[~2003-02-21 13:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-20 20:00 [PATCH][2.5] replace flush_map() in arch/i386/mm/pageattr.c with flush_tlb_all() Thomas Schlichter
2003-02-20 20:20 ` Andrew Morton
2003-02-20 20:36 ` Dave Jones
2003-02-20 20:30 ` Thomas Schlichter
2003-02-20 20:50 ` Dave Jones
2003-02-21 11:24 ` Thomas Schlichter
2003-02-21 12:19 ` [PATCH][2.5] replace flush_map() in arch/i386/mm/pageattr.c w ith flush_tlb_all() Hugh Dickins
2003-02-21 12:42 ` Thomas Schlichter
2003-02-21 14:20 ` Dave Jones [this message]
2003-02-21 14:25 ` Thomas Schlichter
2003-02-21 15:01 ` Dave Jones
2003-02-21 14:52 ` Hugh Dickins
2003-02-21 15:10 ` Dave Jones
2003-02-21 17:36 ` Dave Jones
2003-02-22 3:23 ` [PATCH][2.5] fix preempt-issues with smp_call_function() Thomas Schlichter
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