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 for <linuxppc-dev@lists.ozlabs.org>; Wed,  8 Jun 2016 23:51:34 +1000 (AEST)
Subject: Kernel 4.7: PAGE_GUARDED and _PAGE_NO_CACHE
To: Darren Stevens <darren@stevens-zone.net>,
 Michael Ellerman <mpe@ellerman.id.au>,
 "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
 Benjamin Herrenschmidt <benh@kernel.crashing.org>,
 linuxppc-dev@lists.ozlabs.org, Michael Ellerman <michaele@au1.ibm.com>,
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 "contact@a-eon.com" <contact@a-eon.com>, Matthew Leaman <matthew@a-eon.biz>,
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From: Christian Zigotzky <chzigotzky@xenosoft.de>
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Date: Wed, 8 Jun 2016 15:51:00 +0200
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Hi All,

I tried to revert this commit but unfortunately I doesn't work:

git revert d6a9996e84ac4beb7713e9485f4563e100a9b03e

error: could not revert d6a9996... powerpc/mm: vmalloc abstraction in 
preparation for radix
hint: after resolving the conflicts, mark the corrected paths
hint: with 'git add <paths>' or 'git rm <paths>'
hint: and commit the result with 'git commit'


Any hints?

Thanks,

Christian

On 08 June 2016 at 1:33 PM, Darren Stevens wrote:
> Hello Christian
>
> That's not where I ended up with my bisect, this commit is about 10 before the
> one I found to be bad, which is:
>
> commit d6a9996e84ac4beb7713e9485f4563e100a9b03e
> Author: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
> Date:   Fri Apr 29 23:26:21 2016 +1000
>
>      powerpc/mm: vmalloc abstraction in preparation for radix
>      
>      The vmalloc range differs between hash and radix config. Hence make
>      VMALLOC_START and related constants a variable which will be runtime
>      initialized depending on whether hash or radix mode is active.
>      
>      Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
>      [mpe: Fix missing init of ioremap_bot in pgtable_64.c for ppc64e]
>      Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
>
> Not sure how we are getting different results though. I have attached my
> bisect log and the suspect commit, whcih is quite large. I'm not sure which
> part of it is at fault. I have some jobs to do now, but hope to get tesing
> this later today.
>
> Regards
> Darren