linux-kernel - Re: [PATCH 15/34] frv: handle pgtable_page

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Message-Id: <20131014091235.C06FBE0090@blue.fi.intel.com>
Date:	Mon, 14 Oct 2013 12:12:35 +0300 (EEST)
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	David Howells <dhowells@...hat.com>
Cc:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	dhowells@...hat.com, 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 15/34] frv: handle pgtable_page_ctor() fail

David Howells wrote:
> 
> Acked-by: David Howells <dhowells@...hat.com>
> 
> for the FRV and MN10300 patches.
> 
> Can you move pte_alloc_one() to common code, at least for some arches?  I
> think that the FRV and MN10300 ones should end up the same after this - and I
> wouldn't be surprised if some of the other arches do too.

There's no true approach for generic. It depends on what pgtable_t is:
pointer to struct page or virtual address of the allocated page table.
Some arches also use some sort of cache for page table allocator. Others
don't.

I don't see a sensible way generalize it.

-- 
 Kirill A. Shutemov
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