[Devel] Re: [PATCH 1/4] signals: SEND_SIG_NOINFO should be considered as SI_FROMUSER()

[Roland McGrath]

This whole series looks fine to me.  I think in commenting and cleaning up
any of this, it bears explicit mention that (almost) every signal is
potentially reduced to SI_USER.  That is, in siqueue exhaustion you don't
get any info and only non-special non-SI_USER >=SIGRTMIN signals ever fail
to get posted, so you get the all-zeros defaults from collect_signal() at
delivery time.  That's the principle you're encoding in your si_fromuser()
logic, but your logs and comments are not explicit about the relationship
between that logic and what's implicit in the queue-exhaustion behavior.


Thanks,
Roland
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