was the real-time patch merged kernel main stream?

hi guys:

I remember on several years ago, both montavista and windriver provided the real-time patch(hard-realtime ? )

nowadays, these paths has been merged with the kernel mainstream ?

what’s the situation of kernel regarding the real-time features?

is it soft-realtime or hard-realtime?

ps:from kernel 2.6 preempt kernel was introduced, but I don’t think it is a true real-time (even it is not soft-time?)


thanks
jon

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