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

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Message-ID: <46A506F8.2020206@colorfullife.com>
Date:	Mon, 23 Jul 2007 21:52:24 +0200
From:	Manfred Spraul <manfred@...orfullife.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	linux-kernel@...r.kernel.org,
	"Agarwal, Lomesh" <lomesh.agarwal@...el.com>,
	Nigel Cunningham <nigel@...el.suspend2.net>
Subject: RE: which signal is sent to freeze process?

Rafael wrote:
> On Monday, 23 July 2007 20:38, Agarwal, Lomesh wrote:
> > The other problem I am facing that read from socket returns with ENODATA
> > when resuming. any ideas?
>
> It's of similar kind: the system call checks signal_pending(current) and exit
> with an error if that's true.
>
> Well, I'm afraid we can't place try_to_freeze() in every system call that
> does something like that ...
>   
I don't understand why the poll() system call returns to user space. 
poll() uses ERESTARTNOHAND, thus it should not return to user space.
Any ideas why ERESTARTNOHAND doesn't work?

--
    Manfred
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