Jan Kiszka wrote: > 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? >
BTW, the latter compiles fine for me as well (in my case by providing the full path to xeno-config via XENO_CONFIG to "make"). Jan
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