Back to UTCB IPC
cheng.guanghui.ml at gmail.com
Sat Oct 10 04:51:02 CEST 2009
I pushed this old mail to top and i want to know something about UTCB IPC.
> > UTCB values stays the same. It depends on the generated stub whether
> > UTCB IPC is actually used or not. Sending a flexpage, usually
> > disqualifies the usage of UTCB IPC.
> Do you mean, once a flexpage is sent no UTCB IPC should be sent after ?
I am interested in the question above because in the Thread::transfer_msg
function as this:
1343 sender_regs->copy_msg (dst_regs);
1345 copy_utcb_to (tag, receiver);
It seems every time the utcb ipc will follow the register ipc. Is it right?
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