linux-kernel - Re: [PATCH] nbd.c:sock_xmit: cleanup signal related code

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Date:	Fri, 15 Jun 2007 00:11:32 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Paul Clements <paul.clements@...eleye.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Pavel Machek <pavel@....cz>,
	Roland McGrath <roland@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nbd.c:sock_xmit: cleanup signal related code

On 06/14, Paul Clements wrote:
>
> Oleg Nesterov wrote:
> 
> >Note: I can't understand this dequeue_signal(), it can dequeue SIGKILL
> >for the user-space task doing nbd_ioctl() ?
> 
> So we can interrupt an nbd transmission without waiting for a TCP 
> timeout (when we know the network is down).

Yes, but that task should not survive after SIGKILL ? Note that SIGNAL_GROUP_EXIT
is set, this is not good.

Oleg.

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