linux-kernel - Re: [RFC patch 2/7] thp: introduce pmdp

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Message-ID: <CAJd=RBBQJCxgdrEnAdoVu+PLjkzTOBnDyJX_bqUdbQdo5TQoJw@mail.gmail.com>
Date:	Sat, 25 Aug 2012 20:36:37 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Gerald Schaefer <gerald.schaefer@...ibm.com>
Cc:	akpm@...ux-foundation.org, aarcange@...hat.com, linux-mm@...ck.org,
	ak@...ux.intel.com, hughd@...gle.com, linux-kernel@...r.kernel.org,
	schwidefsky@...ibm.com, heiko.carstens@...ibm.com
Subject: Re: [RFC patch 2/7] thp: introduce pmdp_invalidate()

On Fri, Aug 24, 2012 at 1:17 AM, Gerald Schaefer
<gerald.schaefer@...ibm.com> wrote:

> +#ifndef __HAVE_ARCH_PMDP_INVALIDATE
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> +static inline void pmdp_invalidate(struct vm_area_struct *vma,
> +                                  unsigned long address, pmd_t *pmdp)
> +{
> +       set_pmd_at(vma->vm_mm, address, pmd, pmd_mknotpresent(*pmd));

	set_pmd_at(vma->vm_mm, address, pmdp, pmd_mknotpresent(*pmdp));  yes?

> +       flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
> +}
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