linux-kernel - Re: [linux-pm] [PATCH] Remove process freezer from suspend to RAM pathway

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Message-ID: <20070703212002.GA28895@srcf.ucam.org>
Date:	Tue, 3 Jul 2007 22:20:02 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Subject: Re: [linux-pm] [PATCH] Remove process freezer from suspend to RAM pathway

On Tue, Jul 03, 2007 at 05:16:37PM -0400, Alan Stern wrote:
> On Tue, 3 Jul 2007, Matthew Garrett wrote:
> > But that's fine - "Are we undergoing a systemwide suspend" is an easy 
> > question to ask. Freezing processes instead means that most of those 
> > paths will never be tested.
> 
> The question is easy to ask, but it's not so easy to figure out what
> you should do if the answer is Yes.  Freezing processes instead means
> that those "untested" paths -- in many, many drivers -- won't have to 
> exist at all.

We're used to the idea of applications blocking when a resource they're 
using goes away - NFS has done it forever. 

-- 
Matthew Garrett | mjg59@...f.ucam.org
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