linux-kernel - Re: Suspend order

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] [day] [month] [year] [list]

Date:	Wed, 5 Dec 2007 01:26:12 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Kristoffer Ericson <kristoffer.ericson@...il.com>
Cc:	linux-main <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: Suspend order

Hi,

On Tuesday, 4 of December 2007, Kristoffer Ericson wrote:
> Hey rafael,
> 
> For obvious reasons it would be great to have serial output to be the last to enter suspend, thus giving every last drop of debugging
> before actually turning the machine "off".
> 
> I'm not aware of any specific order currently, from what I've seen currently  every driver is asked to go into suspend at the same time. This of course providing driver x isn't dependant on driver y. You following?
> 
> So, without digging to much into this, is there any specific order?

Yes, there is.

Devices are suspended in the order reverse with respect to the one in which
they have been registered (ie. the last registered device is suspended first).

Still, if you want the serial console to work over the suspend, try booting the
kernel with the no_console_suspend command line switch (that's applicable to
the current mainline, there was a configuration option for that previously).

Greetings,
Rafael
--
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/