On 09/22/2009 07:55 PM, Peter Zijlstra wrote:
If you're using lockdep, surely that's not your biggest worry?
No, but that's all under #ifdef and fully disappears when not enabled.
Generic return-tu-user notifiers don't sound like they will though.
They will if not selected. If selected and not armed, they will have
zero runtime impact since they piggyback on existing branches
(_TIF_DO_NOTIFY_MASK and near relatives). If selected and armed they'll
cause __switch_to_xtra() on every context switch and do_notity_resume()
on syscall exit until disarmed, but then you've asked for it.
--
error compiling committee.c: too many arguments to function
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