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Message-ID: <a522f3c.3bab16d1.4b413b9c.ec43@o2.pl> Date: Mon, 04 Jan 2010 01:51:40 +0100 From: Bartłomiej Zimoń <uzi18@...pl> To: linux-kernel@...r.kernel.org Cc: rjw@...k.pl, awalls@...ix.net, danborkmann@...glemail.com, linux-pm@...ts.linux-foundation.org, stern@...land.harvard.edu Subject: Re: [suspend/resume] Re: userspace notification from module Dnia 4 stycznia 2010 0:45 "Rafael J. Wysocki" <rjw@...k.pl> napisał(a): > On Monday 04 January 2010, Bartłomiej Zimoń wrote: > > Thx Rafael - now it clear to me. > > And what do You think about sending extra signals to processes? > > I don't see a problem with this in principle, although I don't think signals > are very suitable for this particular purpose, because you need two-way > communication between the power manager and the processes it's going to > notify (because it has to wait for the processes to finish their preparations > and to tell it that they are ready). > > For this purpose it's better to have a file descriptor you can block on (like a > socket or a pipe) while the other side is doing it's job. > So let's create one in power/user.c or use /sys/power/state for this :) Best regards. Bartłomiej Zimoń PLD Linux, Kadu Team, FreeRunner user http://kadu-im.blogspot.com/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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