Messages in this thread | | | Date | Tue, 20 Aug 2002 00:36:36 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [patch] O(1) sys_exit(), threading, scalable-exit-2.5.31-A6 |
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On Mon, 19 Aug 2002, Dave McCracken wrote:
> > No, you only need to make debugged children slightly pecial in wait4(), in > > that the parent must never see their state, only the fact that they are > > there (as if they were still running, in short, regardless of their _real_ > > state) > > So does that mean we need something like a 'count of children stolen by > debuggers' in the task struct that wait4() can check?
in fact we have this already, almost:
if (!list_empty(¤t->ptrace_children))
then block (or return -EAGAIN). Instead of the current -ENOCHLD.
Ingo
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