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Re: [Xen-devel] put_page in ptwr_do_page_fault

To: Xinxin Jin <xinxinjin89@xxxxxxxxx>
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Mon, 15 Oct 2012 09:39:11 +0100
Cc: "Xen-devel@xxxxxxxxxxxxx" <Xen-devel@xxxxxxxxxxxxx>
Delivery-date: Mon, 15 Oct 2012 08:39:32 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

Please don't top post.

On Mon, 2012-10-15 at 09:13 +0100, Xinxin Jin wrote:
> Hmmm, put_page() release the page, but seems get_page_from_pagenr()
> does not allocate a page ? Thanks !

It's implementing reference counting.

Ian.


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References:
- [Xen-devel] put_page in ptwr_do_page_fault
  - From: Xinxin Jin
- Re: [Xen-devel] put_page in ptwr_do_page_fault
  - From: Ian Campbell
- Re: [Xen-devel] put_page in ptwr_do_page_fault
  - From: Xinxin Jin

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