linux-kernel - Re: [PATCH 01/34] x86: add missed pgtable_pmd_page

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Message-ID: <20131011055058.GA4838@gmail.com>
Date:	Fri, 11 Oct 2013 07:50:58 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH 01/34] x86: add missed pgtable_pmd_page_ctor/dtor calls
 for preallocated pmds


* Kirill A. Shutemov <kirill.shutemov@...ux.intel.com> wrote:

> I've missed that we preallocate few pmds on pgd_alloc() if X86_PAE
> enabled. Let's add missed constructor/destructor calls.
> 
> I haven't noticed it during testing since prep_new_page() clears
> page->mapping and therefore page->ptl. It's effectively equal to
> spin_lock_init(&page->ptl).
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

Acked-by: Ingo Molnar <mingo@...nel.org>

Thanks,

	Ingo
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