linux-kernel - Re: [linux-pm] [PATCH 1/8] PM: Add suspend block api.

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]

Date:	Thu, 6 May 2010 11:33:35 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	Brian Swetland <swetland@...gle.com>,
	Alan Stern <stern@...land.harvard.edu>,
	mark gross <mgross@...ux.intel.com>, markgross@...gnar.org,
	Len Brown <len.brown@...el.com>, linux-doc@...r.kernel.org,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Oleg Nesterov <oleg@...hat.com>, Tejun Heo <tj@...nel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [linux-pm] [PATCH 1/8] PM: Add suspend block api.

* Matthew Garrett <mjg@...hat.com> [100506 10:39]:
> On Thu, May 06, 2010 at 10:38:08AM -0700, Tony Lindgren wrote:
> 
> > If your userspace keeps polling and has runaway timers, then you
> > could suspend it's parent process to idle the system?
> 
> If your userspace is suspended, how does it process the events that 
> generated a system wakeup? If we had a good answer to that then suspend 
> blockers would be much less necessary.

Well if your hardware runs off-while-idle or even just
retention-while-idle, then the basic shell works just fine waking up
every few seconds or so.

Then you could keep init/shell/suspend policy deamon running until
it's time to suspend the whole device. To cut down runaway timers,
you could already freeze the desktop/GUI/whatever earlier.

Regards,

Tony

--
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/