On 03/22/2013 05:58:37 AM, Johannes Berg wrote:
On Tue, 2013-03-19 at 17:16 -0500, Scott Wood wrote:
> > > I wonder about kernel modules, though flushing 32 MiB wouldn't
be
> > > adequate there.
> >
> > Good question, but would they be running? You have to have
everything
> > built in that you need to load the image? Or maybe not, with the
> > userspace image restoration that became possible at some point...
>
> Is that all that's being restored in this step, or would we be
loading
> all modules that were loaded before suspend (as they're normally not
> swappable)? I'm not too familiar with what gets saved where.
Yes, they would be restored since full memory is restored, but the
kernel doing the restore hasn't typically had a chance to load
modules.
Although with uswsusp there probably are ways it can already have.
If we're loading executable code that wasn't there before[1], we need
to flush -- but there's no reason why modules would only be in the
lower 32 MiB.
-Scott
[1] within the resume process, not before suspend
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