Re: MIPS PREEMPT_RT update..

[Ingo Molnar]

* john cooper <john.cooper@xxxxxxxxxxx> wrote:

> As a qualification, I am still chasing a few problems which I suspect 
> are related to the Malta patch for 2.6.14 rather than the mips-rt 
> patch.  One appears to be a TLB handler problem in 2.6.14.  The other 
> appears to be potentially excessive context switching, although I 
> haven't had the opportunity yet to fully investigate this issue.  I 
> will follow up should resolution of these feed back into generic 
> mips-rt support.

FYI, i have released your big MIPS merge as part of 2.6.14-rt9. [please 
double-check i did not mis-merge any component]

wrt. your TLB problems: it might be related that TLB handling got 
simplified (and sped up) with the introduction of a generic, preemptible 
method to handle TLB-gathers. There's no tlb-simple.h anymore.

excessive context-switching might happen in some cases when we ping-pong 
short-held locks, and i'm certainly interested in a reproducer or 
analysis (or patch! :-).

	Ingo
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