Messages in this thread | | | Subject | Re: [3/3 PATCH] Kprobes: User space probes support- single stepping out-of-line | From | Arjan van de Ven <> | Date | Mon, 20 Mar 2006 12:24:01 +0100 |
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> And we'll need to actually *be* in-atomic. That means we need an > open-coded inc_preempt_count() and dec_preempt_count() in there and I don't > see them. >
..
> Why is VM_LOCKED being set? (It needs a comment). > > Where does it get unset?
if this is an attempt to make the copy_in_atomic to be atomic, then it is a bug; the user can unset this bit after all via mprotect, even from another thread, and concurrently. UnGood(tm).
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