linux-kernel - Re: Hibernate resume bug around 3,18-rc2

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: <564F10D5.3090309@suse.com>
Date:	Fri, 20 Nov 2015 13:23:49 +0100
From:	Juergen Gross <jgross@...e.com>
To:	vasvir@....demokritos.gr
Cc:	linux-kernel@...r.kernel.org, Toshi Kani <toshi.kani@...com>,
	"Luis R. Rodriguez" <mcgrof@...e.com>
Subject: Re: Hibernate resume bug around 3,18-rc2 - Full PAT support

On 20/11/15 11:04, vasvir@....demokritos.gr wrote:
>> I've just found a potential issue: In case MTRR is disabled by the BIOS
>> the PAT register of the boot processor won't be restored after resume.
>>
>> Can you check whether pr_info("MTRR: Disabled\n") has been executed in
>> early boot? If yes, this might be a BIOS option.
>>
> 
> I don't have access right now. I will test it later tonight (This is my
> home machine).
> 
> Would $dmesg | grep -i mtrr suffice or I need to look for the mtrr
> somewere else e.g. /proc /sys etc?

I think grepping for MTRR in dmesg should be enough.


Juergen

--
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/