netdev - Re: [PATCH 1/2] af_packet: use vmalloc_to_page() instead for the addresss returned by vmalloc()

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Message-ID: <AANLkTim7SSRMkhc_eMz+Bk12kAwfG==j-dH4NOPu-uS2@mail.gmail.com>
Date:	Wed, 1 Dec 2010 21:05:54 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Neil Horman <nhorman@...driver.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Pirko <jpirko@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] af_packet: use vmalloc_to_page() instead for the
 addresss returned by vmalloc()

On Tue, Nov 30, 2010 at 10:37 PM, Neil Horman <nhorman@...driver.com> wrote:
> Off the top of my head, I would think that pgv_to_page could be prototyped such
> that it could accept addr, offset and struct page ** arguments.  That way we can
> track the current page that we're mapped to, lowering the number of calls to
> vmalloc_to_page, and we can still use an increment like we do above (as long as
> its wrapped in a subsequent call to pgv_to_page)

I'll try to optimize pgv_to_page() after this patch series merged. I
am planning to call vmalloc_to_page() previously, and cache its result
in a per pgv array for future use. Thanks.


-- 
Regards,
Changli Gao(xiaosuo@...il.com)
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