Subject: Re: Please Revert newlock2
To: None <>
From: Matt Thomas <>
List: tech-kern
Date: 02/18/2007 18:40:04
Bucky Katz wrote:
> "Thomas E. Spanjaard" <> writes:
>> Bucky Katz wrote:
>>> Thor Lancelot Simon <> writes:
>>>> 2) Either cause them to perform acceptably for your application, or else
>>>>   endeavor to get M:N back in a supported state for uniprocessors.
>>> It has to be the later. The context switch overhead of 1:1 on ARM will
>>> cause a severe performance degradation.
>> Doesn't OMAP support the v4/v5 hyped fast address space switching?
> I dunno. I don't recognize it by that name and can't find any term
> like that in the processor TRM.
> If you mean (and I suspect you do) The "Fast Context Switch Extention"
> FCSE, then yes the OMAP processors we are currently using support it.

Except that FCSE is useless for NetBSD.  It reduces each process to a 64MB
(25 bit address space).