Re: RT patch acceptance

[David Lang <david.lang@digitalinsight.com>]

how much of a slowdown is it?

distros already throw >20% performance improvements on the floor to 
simplify their lives by reduceing the number of different binary kernels 
they have to support.

somehow I don't think a 5% or so (which is the locking overhead of running 
a SMP kernel on UP last I heard) would be the end of the world for them, 
especially if it made multimedia eye candy work smoother.

David Lang

 On Tue, 31 May 2005, Andi Kleen wrote:

> Date: 31 May 2005 22:01:14 +0200  Tue, 31 May 2005 22:01:14 +0200
> From: Andi Kleen <ak@muc.de>
> To: Steven Rostedt <rostedt@goodmis.org>
> Cc: karim@opersys.com, linux-kernel@vger.kernel.org, akpm@osdl.org,
>     hch@infradead.org, dwalker@mvista.com, Ingo Molnar <mingo@elte.hu>,
>     Sven-Thorsten Dietrich <sdietrich@mvista.com>,
>     James Bruce <bruce@andrew.cmu.edu>, kus Kusche Klaus <kus@keba.com>,
>     Nick Piggin <nickpiggin@yahoo.com.au>, Esben Nielsen <simlo@phys.au.dk>,
>     "Bill Huey (hui)" <bhuey@lnxw.com>
> Subject: Re: RT patch acceptance
>
> On Tue, May 31, 2005 at 12:29:35PM -0400, Steven Rostedt wrote:
> > I would assume that the distros would ship without PREEMPT enabled
> > because it was (and probably still is) considered unstable.
>
> In addition to that it is slow too due to much increased locking
> overhead.
>
> -Andi
> -
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