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SubjectRe: [PATCH 8/6] signals: send_signal: factor out SIGNAL_GROUP_EXIT checks
I think your logic is sound.  But for paranoia's sake I would add
a BUG_ON(signal->flags & SIGNAL_GROUP_EXIT) in the group-fatal case.

I don't really like dropping the signal on the floor. If the posting says
it succeeded (vs -ESRCH) then I'd like to see it appear later in the
pending set of the zombie thread, when we look at /proc/pid/status at exit
tracing or whatnot (and in core dumps). Seeing those pending signal bits
is sometimes a useful clue about how something died in a strange scenario.


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