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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