linux-kernel - Re: [PATCH 2/4] signals: send_signal: use si_fromuser() to detect from_ancestor

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Date:	Mon, 5 Oct 2009 17:06:31 -0700
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Lezcano <dlezcano@...ibm.com>,
	Sukadev Bhattiprolu <sukadev@...ibm.com>,
	Linux Containers <containers@...ts.osdl.org>,
	roland@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] signals: send_signal: use si_fromuser() to detect
	from_ancestor_ns

Oleg Nesterov [oleg@...hat.com] wrote:
| Sorry for confusion.
| 
| > But sure, we could use force_sig_info() in caller.
| 
| Yes, because this makes the code more explicit imho. And we can avoid
| the further complicatiions in send_signal() path.

Although, one small drawback would be the different behavior for the
SIGKILL in load_aout_binary() to the container-init itself calling:

	kill(getpid(), SIGKILL);

(which of course is not very useful).
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