Heikki Lindholm wrote: > Jan Kiszka kirjoitti: > >> Heikki Lindholm wrote: >> >>> Xenomai might preempt linux when linux has cleared a tasks MSR_FP, but >>> not yet set last_task_used_math to NULL. As a result the tasks MSR_FP >>> will get set, although it should be cleared. If the task happens to hit >>> one of the codepaths that save FPU state if MSR_FP is set, the wrong FPU >>> state might be saved to the task. The attached patch should fix this. I >>> couldn't try it on most recent Xenomai trunk, because latency wouldn't >>> build anymore. However, I see no reason it shouldn't work. All thee >> >> >> >> Is it still broken with latest revision 376? Philippe had merged the fix >> for my mess, and it worked at least for 2.6 on my box again. > > > I'd say this has been unchanged since the beginning (0.9?). >
Then, what latency are we talking about? My last modifications went to src/testsuite/latency. Did you mean ksrc/skins/native/demos/latency.c? Jan
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