linux-kernel - RE: which signal is sent to freeze process?

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Message-ID: <A3258B497F1C1441AD36A2E8B45FD628550DD6@scsmsx412.amr.corp.intel.com>
Date:	Thu, 19 Jul 2007 14:06:01 -0700
From:	"Agarwal, Lomesh" <lomesh.agarwal@...el.com>
To:	<nigel@...pend2.net>, "Rafael Wysocki" <rjw@...k.pl>
Cc:	<linux-kernel@...r.kernel.org>
Subject: RE: which signal is sent to freeze process?

So basically I can not install a signal handler to catch freeze signal
in the process. Right?
Is there any other way to solve the problem I am facing? After resume
some of the system calls are failing in some of my applications with
errno set as EINTR. I wanted to explore a way to not check for this
error all over the place and somehow retry failed system call. Any
ideas?

-----Original Message-----
From: Nigel Cunningham [mailto:nigel@...el.suspend2.net] 
Sent: Wednesday, July 18, 2007 9:59 PM
To: Agarwal, Lomesh; Rafael Wysocki
Cc: linux-kernel@...r.kernel.org
Subject: Re: which signal is sent to freeze process?

Hi.

On Thursday 19 July 2007 14:09:56 Agarwal, Lomesh wrote:
> Can you point me to code where kernel captures process in signal
> handling and code which runs after suspend to ram is finished?

Sure.

It's in kernel/signal.c (get_signal_to_deliver) for x86 and x86_64, and 
arch/<name>/kernel/signal.c for other arches. The support for other
arches is 
the place x86 & x86_64 used to use - I wonder if they should be going
away 
(Rafael cc'd to raise this point with him).

Regards,

Nigel
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