Re: [patch] Real-Time Preemption, -RT-2.6.12-rc3-V0.7.46-01

Lee Revell
2005-04-30T23:28:23Z

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On Fri, 2005-04-22 at 08:27 +0200, Ingo Molnar wrote:
> i have released the -V0.7.46-01 Real-Time Preemption patch, which can be
> downloaded from the usual place:
>
> http://redhat.com/~mingo/realtime-preempt/

Ingo,

With Mingming's patch to resolve the ext3 allocate-with-reservation
latency, it looks like we are finally getting close to the lower limit
that can be achieved with PREEMPT_DESKTOP. I've attached the trace of
the lowest latency over several days of testing with
2.6.12-rc3-RT-V0.7.46-02 + Mingming's patch. It's only 127 usecs, and
IIRC you mentioned previously that this code path can't be made
preemptible in !PREEMPT_RT.

Since Mingming's patch will have to live in -mm for a while, can it be
added to the RT patchset as well?

http://lkml.org/lkml/2005/4/22/127

Lee

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