To: Ross Biro <ross.biro@gmail.com>
Cc: linux-kerneL@vger.kernel.org
Subject: Re: [PATCH 2.6.14] X86_64 delay resolution
References: <8783be660512090834l40b5c051p6c58676bccc834fc@mail.gmail.com>
From: Andi Kleen <ak@suse.de>
Date: 09 Dec 2005 16:24:26 -0700
In-Reply-To: <8783be660512090834l40b5c051p6c58676bccc834fc@mail.gmail.com>
Message-ID: <p73slt1q2fp.fsf@verdi.suse.de>
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Ross Biro <ross.biro@gmail.com> writes:

> On x86_64 smp systems, we noticed that the amount of time udelay would
> spin for varied from cpu to cpu.  In our test case, udelay(10) would
> only delay for 9.7us on some cpus while on others it would delay for
> the full 10us.  We tracked the problem down to an unnecessary attempt
> to avoid arithmetic overflow.  Here's a fix complete with an overly
> verbose comment.

I applied it without the comment and without the extra sets
of brackets. Please submit future x86-64 patches directly
to me and also Signed them off and use toplevel diffs.

Thanks,
-Andi
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