From: Andrew Morton <akpm@linux-foundation.org>
To: Ron <ron@debian.org>
Cc: mingo@elte.hu, a.p.zijlstra@chello.nl, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] fix for sched_clock() when using jiffies
Date: Sat, 9 May 2009 00:04:06 -0700 [thread overview]
Message-ID: <20090509000406.c2022a0b.akpm@linux-foundation.org> (raw)
In-Reply-To: <20090509040537.GA5417@homer.shelbyville.oz>
On Sat, 9 May 2009 13:35:37 +0930 Ron <ron@debian.org> wrote:
> All 'real'
> sched_clock implementations (empirically) count from 0, except this
> default one.
Well you live and learn.
Yup, we should make the toy sched_clock() match the fancy ones.
otoh, sched_clock() should do the INTITAL_JIFFIES offsetting as well,
because there are probably callers of sched_clock() who are buggy in
the presence of sched_clock()-return-value wraparound.
otooh, sched_clock() wraparound takes nearly 500 years so we can
afford to wait until linux-2.7.x to fix this.
I'll go off and find your original patch. This was all a difficult way of
writing the changelog ;)
next prev parent reply other threads:[~2009-05-09 7:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-26 15:06 [patch] fix for sched_clock() when using jiffies Ron
2008-11-26 15:16 ` Peter Zijlstra
2008-11-26 15:31 ` Ron
2008-11-28 14:40 ` Ingo Molnar
2009-05-08 13:24 ` [PATCH] " Ron
2009-05-08 20:04 ` Ron
2009-05-08 23:01 ` Andrew Morton
2009-05-09 0:40 ` Ron
2009-05-09 1:15 ` Andrew Morton
2009-05-09 4:05 ` Ron
2009-05-09 7:04 ` Andrew Morton [this message]
2009-05-10 10:45 ` Ron
2009-05-09 12:41 ` Paul Mundt
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