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Re: [PATCH] MIPS: nofpu and nodsp only affect CPU0

To: Kevin Cernekee <>
Subject: Re: [PATCH] MIPS: nofpu and nodsp only affect CPU0
From: Ralf Baechle <>
Date: Mon, 10 May 2010 21:19:59 +0100
In-reply-to: <0b6db1ee1efbe0daa1320b59ab5093ba5af377b8@localhost.localdomain>
Original-recipient: rfc822;
References: <0b6db1ee1efbe0daa1320b59ab5093ba5af377b8@localhost.localdomain>
User-agent: Mutt/1.5.20 (2009-08-17)
On Sun, May 02, 2010 at 02:43:52PM -0700, Kevin Cernekee wrote:

> The "nofpu" and "nodsp" kernel command line options currently do not
> affect CPUs that are brought online later in the boot process or
> hotplugged at runtime.  It is desirable to apply the nofpu/nodsp options
> to all CPUs in the system, so that surprising results are not seen when
> a process migrates from one CPU to another.

I like this patch; this solution is also cleaner than iterating over the
cpu data array.  However as it constitutes a change in established kernel
behaviour I prefer to queue this patch for 2.6.35 rather than applying it



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