linux-kernel - Re: mtrr cleanup not doing anything on 2.6.33-rc7

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, 11 Feb 2010 06:56:59 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Carlos R. Mafra" <crmafra2@...il.com>
CC:	Alexander Lam <lambchop468@...il.com>,
	linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>
Subject: Re: mtrr cleanup not doing anything on 2.6.33-rc7

On 02/11/2010 02:10 AM, Carlos R. Mafra wrote:
> [Add people in that commit to Cc: list, just in case]
> 
> On Mi 10.Feb'10 at 20:48:49 -0500, Alexander Lam wrote:
>> On Wed, Feb 10, 2010 at 3:02 PM, Alexander Lam <lambchop468@...il.com> wrote:
>>>
>>> My kernel config has the following:
>>> CONFIG_MTRR=y
>>> CONFIG_MTRR_SANITIZER=y
>>> CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
>>> CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
>>>
>>> With previous kernels, dmesg would show that the sanitizer was indeed
>>> cleaning up the mtrrs [1]
>>>
>>> but now, with 2.6.33-rc7 there is no indication that this is occuring,
>>
>> For those who run across this later,
>>
>> Found out that commit 508d85c2c6bc8cba53d2a54d9a306ad64a0a80bf,
>>    x86: When cleaning MTRRs, do not fold WP into UC
>>
>> causes mtrr cleanup not to run on my machine.
>>
>> Probably not worth fixing because the i915 error message is harmless.
>> --

You're not stating what your MTRR setup looks like, and hence if there
is anything to clean up.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

--
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/