linux-kernel - Re: [PATCH 1/1] suspend: delete sys

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150706110645.GC381@amd>
Date:	Mon, 6 Jul 2015 13:06:45 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Dave Chinner <david@...morbit.com>,
	Len Brown <lenb@...nel.org>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Linux PM list <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 1/1] suspend: delete sys_sync()

On Mon 2015-07-06 01:28:20, Rafael J. Wysocki wrote:
> On Saturday, July 04, 2015 10:19:55 AM Alan Stern wrote:
> > On Sat, 4 Jul 2015, Rafael J. Wysocki wrote:
> > 
> > > The only argument against dropping sys_sync() from the suspend code path
> > > I've seen in this thread that I entirely agree with is that it may lead to
> > > regressions, because we've done it practically forever and it may hide latent
> > > bugs somewhere in block drivers etc.  Dropping it, though, is the only way
> > > to see those bugs, if any, and if we want to ever fix them, we need to see
> > > them.  That's why I think that it may be a good idea to allow people to
> > > drop it if they are willing to accept some extra risk (via the kernel
> > > command line, for example).
> > 
> > I'd be perfectly happy to have the sync selectable at runtime, one way 
> > or another.  The three most reasonable options seem to be:
> > 
> > 	kernel command line
> > 
> > 	sysfs file
> > 
> > 	sysctl setting
> > 
> > The command line is less flexible (it can't be changed after booting).  
> > Either of the other two would be fine with me.
> 
> We'll probably use a sysfs file (possibly plus a Kconfig option to set the
> boot time default).

Android people can already do sync-less s2ram using existing
interface. IMO they should just do it.

In any case, sysfs file + Kconfig is an overkill. We already have too
many Kconfig options.

There's not a single Android phone supported by mainline
kernel. I'm sure they have bigger problems than Android setting
default sysfs values...

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