From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Hicks Date: Tue, 25 Mar 2003 18:03:55 +0000 Subject: Re: [Linux-ia64] [patch] logical CPU numbering Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Thu, Mar 20, 2003 at 12:07:32PM -0800, Wichmann, Mats D wrote: > > > If a CPU fails to start during smp_boot_cpus(), then the logical CPU > > numbering gets will have a "hole". Using the number of booted CPU's > > instead of the loop index will correct this. > > Just curious, does having a hole cause a problem? > It might well; I don't know. > > I consider some future scenario where if cpu X > didn't come up, it can be hot-replaced, at which > point one might actually want to have that "slot" > reserved for it. I thought there was some code that depended on having logical cpus numbered without holes. I can't find any evidence of it anymore, so perhaps its not a bug. mh -- Wild Open Source Inc. mort@wildopensource.com