linux-kernel - Re: Attempted summary of suspend-blockers LKML thread, take two

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Message-ID: <20100809072618.GB1586@ucw.cz>
Date:	Mon, 9 Aug 2010 09:26:18 +0200
From:	Pavel Machek <pavel@....cz>
To:	david@...g.hm
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	arve@...roid.com, mjg59@...f.ucam.org, florian@...kler.org,
	rjw@...k.pl, stern@...land.harvard.edu, swetland@...gle.com,
	peterz@...radead.org, tglx@...utronix.de, alan@...rguk.ukuu.org.uk,
	menage@...gle.com, david-b@...bell.net, James.Bottomley@...e.de,
	tytso@....edu, arjan@...radead.org, swmike@....pp.se,
	galibert@...ox.com, dipankar@...ibm.com
Subject: Re: Attempted summary of suspend-blockers LKML thread, take two

Hi!

> >I should have asked this earlier...  What exactly are the apps'
> >compatibility constraints?  Source-level APIs?  Byte-code class-library
> >invocations?  C/C++ dynamic linking?  C/C++ static linking (in other
> >words, syscall)?
> 
> For Java/Dalvik apps, the wakelock API is pertty high level -- it
> talks to a service via RPC (Binder) that actually interacts with the
> kernel.  Changing the basic kernel<->userspace interface (within

Strange. Arve claimed that open/close is too slow, and few
microseconds faster ioctl is needed, and now we learn it actually uses
RPC.

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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