linux-kernel - Re: [PATCH 1/4] signals: SEND_SIG_NOINFO should be considered as SI

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Message-ID: <20091006133732.GB8628@redhat.com>
Date:	Tue, 6 Oct 2009 15:37:32 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Roland McGrath <roland@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	Daniel Lezcano <dlezcano@...ibm.com>,
	Sukadev Bhattiprolu <sukadev@...ibm.com>,
	Linux Containers <containers@...ts.osdl.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] signals: SEND_SIG_NOINFO should be considered as
	SI_FROMUSER()

On 10/06, Roland McGrath wrote:
>
> 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.

Yes,

> but your logs and comments are not explicit about the relationship
> between that logic and what's implicit in the queue-exhaustion behavior.

Yes. the changelog for 3/4 mentions that this SI_USER doesn't really
mean SI_FROMUSER(), but I agree I should have been more explicit.

Perhaps, we should add the comment to explain that both SI_FROMUSER()
and si_fromuser() are only valid in the sending pathes. Fortunately
get_signal_to_deliver and friends do not care about the origination of
the signal.

Oleg.

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