> i think i see where the misunderstanding comes from: thread Y does not
> want to get into the address space of X - this is how the current
> CLEAR_TID code works and is expected to work. Threads always free their
> *own* thread state descriptor upon exit (eg. they set a flag in their
> own thread descriptor), not some field in the parent's domain. So thread
> Y does not ever want to write into X's address space - it wants to write
> into the VM that it's part of currently - if a fork() created a new VM
> then so be it, it's not attached to X in any way.
and this is the reason why i named the clone flag CLONE_RELEASE_VM - upon
exit a thread wants to 'release its reference to the VM' - and free all
state it still holds. Stack or whatever other state it has.
Ingo
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