Date: Sun, 27 Sep 2015 17:07:50 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Colin Percival <cperciva@FreeBSD.org> Cc: Jung-uk Kim <jkim@FreeBSD.org>, John Baldwin <jhb@FreeBSD.org>, "freebsd-acpi@freebsd.org" <freebsd-acpi@FreeBSD.org>, Dan Lukes <dan@obluda.cz> Subject: Re: disabling sleep when shutting down Message-ID: <20150927164605.U29510@sola.nimnet.asn.au> In-Reply-To: <5606EA4A.3090705@freebsd.org> References: <55FA3848.7090802@freebsd.org> <55FB233D.2080000@FreeBSD.org> <55FB48E3.20401@freebsd.org> <55FC4F13.3090603@FreeBSD.org> <55FC57F9.3050702@yahoo.com> <55FE5D54.1030806@freebsd.org> <5601A863.5070406@FreeBSD.org> <560262BF.7090107@freebsd.org> <5602DE8D.3020102@FreeBSD.org> <560648A7.4030708@freebsd.org> <20150927024553.L29510@sola.nimnet.asn.au> <5606EA4A.3090705@freebsd.org>
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On Sat, 26 Sep 2015 11:56:10 -0700, Colin Percival wrote: > On 09/26/15 10:59, Ian Smith wrote: > > On Sat, 26 Sep 2015 00:26:31 -0700, Colin Percival wrote: > > > Points without consensus: > > > * jkim thinks we should prevent suspend when we're dropping to single-user > > > mode; I'm not sure I see the point, but I don't think there's any harm in > > > doing that too. > > > > We should prevent suspending _during_ shutdown to SU, of course. Once > > happily in SU, is there any reason to disallow suspend? I've done it. > > I think the question here was about suspending during the shutdown to > single-user mode. This seemed a bit different to me since it's not a > "walk away from your laptop" sort of situation. But I've included it > (or rather, not *excluded* it) anyway. Sounds good. As all this shows, we can't assume what anyone might do :) > > > * Ian Smith would like to have suspend blocked for the last 5 minutes before > > > shutdown(8) signals init to shut the system down. I don't think anyone else > > > has expressed a desire for this, and some people have raised concerns about > > > blocking suspend for too long in case a system is running out of battery; so > > > I'm inclined to leave this out at this point. (It would be easy enough to > > > add the sysctl-frobbing to shutdown(8) if desired later.) > > > > Sorry, but that rather misrepresents my position; I was trying to deal > > specifically with the LID foot-shooting potential, in the case of user- > > initiated shutdown, so looking at possible mechanisms. Not to worry, I > > clearly didn't express myself clearly :^\ > > Ok, so you're satisfied with having the suspend-disabling triggered by > init (i.e., not happening until shutdown(8) reaches "now")? Sure, if you're satisfied that 'shutdown [..] now' - or hitting the power button as Dan mentioned - then quickly closing the lid will lose that race. As you say, with this mechanism in place, accessing it from shutdown(8) would be straightforward if deemed necessary. So, yes. > Should be trivial to MFC. Cool. Thanks, Ian
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