linux-kernel - Re: [PATCH V5 0/3] THP related cleanups

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Date:	Tue, 19 May 2015 15:20:57 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au,
	kirill.shutemov@...ux.intel.com, aarcange@...hat.com,
	schwidefsky@...ibm.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH V5 0/3] THP related cleanups

On Fri, 15 May 2015 21:12:27 +0530 "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com> wrote:

> Changes from V4:
> * Folded patches in -mm
>   mm-thp-split-out-pmd-collpase-flush-into-a-separate-functions-fix.patch
>   mm-thp-split-out-pmd-collpase-flush-into-a-separate-functions-fix-2.patch
>   mm-clarify-that-the-function-operateds-on-hugepage-pte-fix.patch
> * Fix VM_BUG_ON on x86.
>  the default implementation of pmdp_collapse_flush used the hugepage variant
>  and hence can be called on pmd_t pointing to pgtable. This resulting in us
>  hitting VM_BUG_ON in pmdp_clear_flush. Update powerpc/mm: Use generic version of pmdp_clear_flush
>  to handle this.
> 
> 
> NOTE: Can we get this tested on s390 ?

fwiw, I build tested s390 allmodconfig in mm/ and arch/s390, no issues.
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