linux-kernel - Re: Unreliable hibernation on Lenovo x230 (regression)

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: <20150402165054.GD2320@linux-rxt1.site>
Date:	Fri, 3 Apr 2015 00:50:54 +0800
From:	joeyli <jlee@...e.com>
To:	Pavel Machek <pavel@....cz>, rhn <kebuac.rhn@...cupinefactory.org>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	joeyli.kernel@...il.com, linux-pm@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: Unreliable hibernation on Lenovo x230 (regression)

Hi, 

On Thu, Apr 02, 2015 at 05:28:05PM +0200, Pavel Machek wrote:
> On Wed 2015-04-01 21:47:43, rhn wrote:
> > Hello,
> > 
> > Between kernel 3.16 and 3.17, a regression has been introduced where the first hibernation after regular shutdown always fails to resume. Subsequent hibernations succeed.
> > 
> > The system is a Lenovo x230 with Intel i5, booting with EFI, with the hibernate partition located on a secondary SSD drive. Installed system is Fedora 20, hibernation and reboots were issued using the KDE shutdown dialog.
> > 
> > I have tracked the problem to first appear in the commit
> > e67ee10190e69332f929bdd6594a312363321a66	Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle'
> > 
> > The problem itself manifests in dmesg as follows (system was first
> > restarted, then hibernated - this log is from the subsequent
> resume):
> 
> Ok, can you try to disable cpufreq and cpuidle, and then try if it
> reproduces?
> 
> At that point, this is the candidate:
> 
> commit e67ee10190e69332f929bdd6594a312363321a66
> Merge: 21c806d 84c91b7 39c8bba 372ba8c
> Author: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Date:   Mon Aug 11 23:19:48 2014 +0200
> 
>     Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle'
> 
>     * pm-sleep:
>           PM / hibernate: avoid unsafe pages in e820 reserved regions
> 
> ...
> Alternatively, you can just try to revert
> 
> commit 84c91b7ae07c62cf6dee7fde3277f4be21331f85
> Author: Lee, Chun-Yi <joeyli.kernel@...il.com>
> Date:   Mon Aug 4 23:23:21 2014 +0800
> 
>     PM / hibernate: avoid unsafe pages in e820 reserved regions
> 
>     When the machine doesn't well handle the e820 persistent when
>     hibernate
>         resuming, then it may cause page fault when writing image to
>     snapshot
>         buffer:
> 
> 
> ...
> 
> Thanks,
> 									Pavel

Before revert 84c91b7ae patch, please check does there have log similar as
following in dmesg when hibernate resume fail?

[   24.349777] PM: 0xab9bc000 in e820 nosave region: [mem 0xab9bc000-0xab9c2fff]

The address may different, by you should see "e820 nosave region" log. Otherwise
we got another problem.


Thanks a lot!
Joey Lee
--
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/