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From: Elad Lahav <elahav@uwaterloo.ca>
To: sparclinux@vger.kernel.org
Subject: Re: Processor IDs on the Niagara
Date: Sat, 13 Sep 2008 00:47:24 +0000	[thread overview]
Message-ID: <48CB0D9C.10901@uwaterloo.ca> (raw)
In-Reply-To: <48CADADA.7050604@uwaterloo.ca>

> The kernel treats core_id=0 as special, therefore we start the
> indexes there at "1".
> 
> The kernel treats proc_id=-1 as special, therefore we start those
> indexes at "0".

My problem was not with the indexing, but rather with the meaning of 
proc_id. It's neither the physical processor ID, nor the virtual 
processor ID. It's just a one-to-one mapping of the core ID. As the 
virtual processor ID is the same as the kernel's CPU ID, I think that 
proc_id should hold the physical processor ID. If not, than this 
information should be kept in some other field of cpu_data.

Elad


  parent reply	other threads:[~2008-09-13  0:47 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-12 21:10 Processor IDs on the Niagara Elad Lahav
2008-09-12 21:44 ` David Miller
2008-09-13  0:47 ` Elad Lahav [this message]
2008-09-13  0:53 ` Elad Lahav
2008-09-13  1:01 ` David Miller
2008-09-13  1:02 ` David Miller
2008-09-13  1:18 ` David Miller
2008-09-13  1:27 ` Elad Lahav
2008-09-13  1:38 ` David Miller
2008-09-15 21:26 ` Elad Lahav
2008-09-15 22:09 ` David Miller
2008-09-16 18:47 ` Elad Lahav
2008-09-16 18:48 ` David Miller
2008-09-17 18:45 ` Elad Lahav
2008-10-05 20:47 ` David Miller
2008-10-05 20:57 ` David Miller
2008-10-06 13:15 ` Elad Lahav

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