Re: [linux-pm] [RFC][PATCH] PM: Force GFP_NOIO during suspend/resume (was: Re: Memory allocations in .suspend became very unreliable)
From: Rafael J. Wysocki
Date: Thu Jan 21 2010 - 16:38:40 EST
On Thursday 21 January 2010, Nigel Cunningham wrote:
> Rafael J. Wysocki wrote:
> > On Thursday 21 January 2010, KOSAKI Motohiro wrote:
> >> - Ask all drivers how much they require memory before starting suspend and
> >> Make enough free memory at first?
> > That's equivalent to reworking all drivers to allocate memory before suspend
> > eg. with the help of PM notifiers. Which IMHO is unrealistic.
> What's unrealistic about it? I can see that it would be a lot of work,
> but unrealistic? To me, at this stage, it sounds like the ideal solution.
First, we'd need to audit the drivers which is quite a task by itself.
Second, we'd need to make changes, preferably test them or find someone with
suitable hardware to do that for us and propagate them upstream.
I don't really think we have the time to do it.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/