From mboxrd@z Thu Jan  1 00:00:00 1970
From: fs.rajat@gmail.com (Rajat Sharma)
Date: Sun, 17 Apr 2011 12:22:57 -0700
Subject: How to retrieve page pointer from vm_area_struct?
In-Reply-To: <BANLkTim1mCV4bm2wtZbgoWsTekYjL7onpA@mail.gmail.com>
References: <BANLkTim1mCV4bm2wtZbgoWsTekYjL7onpA@mail.gmail.com>
Message-ID: <BANLkTinc85DDpO0H++W2Tau6V2t5CU8+sw@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

use get_user_pages, this function works on vma and pin pages in memory
as well, typically used by filesystem Direct I/O implementation.

Thanks,
Rajat

On Sun, Apr 17, 2011 at 9:34 AM, Park Chan ho <parkch98@gmail.com> wrote:
> Hi all,
> I want to retrieve "struct page" pointer from vm_area_struct.
> How do I write code below example?
>
> ------------example code------------
> struct task_struct *p;
> struct vm_area_struct *vma;
> struct page *page;
>
> for_each_process(p) {
> ? ?if (!p->mm) continue;
> ? ?for (vma = p->mm->mmap; vma; vma = vma->vm_next) {
> ? ? ? for (i = vma->vm_start; i < vma->vm_end; i += PAGE_SIZE) {
> ? ? ? ? ? ?/* How to get page pointer? */
> ? ? ? ? ? ?page = ???
> ? ? ? }
> ? ?}
> }
>
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