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

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Message-ID: <18059.23015.860618.268754@cargo.ozlabs.ibm.com>
Date:	Wed, 4 Jul 2007 18:27:19 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway

Oliver Neukum writes:

> > Indeed, and the USB framework has code to know when the host
> > controller is suspended and avoid trying to send out urbs in that
> > case.  Or at least it did last time I looked at it in any detail; it's
> > been "just working" - including suspending and resuming, without the
> > freezer - for quite a while now.
> 
> And what happens to that IO? I suspended and lost data is not an
> acceptable behavior.

It's not lost, it's sitting in RAM, and will be sent out when you
resume.

Paul.
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