linux-kernel - Re: [PATCH] x86 APM: delete Linux kernel APM support

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Message-ID: <20110408062506.GB1596@ucw.cz>
Date:	Fri, 8 Apr 2011 08:25:06 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Ingo Molnar <mingo@...e.hu>, Len Brown <lenb@...nel.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>, x86@...nel.org,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] x86 APM: delete Linux kernel APM support

Hi!

> > So how does your reasoning not apply to those drivers? There's several which 
> > are older than APM support.
> > 
> > We had this really big battle about x86/Voyager two years ago, which x86 
> > subarchitecture literally had just a single user left, and the code was more 
> > intrusive than APM. Even there after much flaming the eventual consensus was 
> > that we'd accept it back if it was done cleanly, as part of the new-style 
> > x86_platform code.
> > 
> > Given that APM fits into the current PM frameworks there's no such problem here 
> > that i can see.
> 
> Well, it kind of does but not really. :-)
> 
> The main problem with APM is that nobody really works on it and I'm not sure
> if there are any active users.  At least no one reports any problems with it,
> which is kind of surprising, given the number of chages we've made in the PM
> core for the last couple of years.  So quite likely it's just become
> non-functional over time anyway, but we have no confirmation.

It was working ok last time I tried -- cca 6/2010.
								Pavel

-- 
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