linux-kernel - All pages belonging to a process

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Message-ID: <689eb3470908242336o6681b516uc21d07979099d8c8@mail.gmail.com>
Date:	Tue, 25 Aug 2009 02:36:38 -0400
From:	Anupama Chandwani <anupama.chandwani@...il.com>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: All pages belonging to a process

Hi,

I need to have a debug print for all pages belonging to a process, for
which i have the following code:

if (task->mm && task->mm->mmap)
{
      /* For all vma-s of a process */
      for (vma = task->mm->mmap; vma!=NULL; vma = vma->next)
      {
               pgd = pgd_offset(mm, address);
               if (!pgd_present(*pgd))
                    continue;

               pud = pud_offset(pgd, address);
               if (!pud_present(*pud))
                    continue;

               pmd = pmd_offset(pud, address);
               if (!pmd_present(*pmd))
                    continue;

              pte = pte_offset_map_lock (task->mm->vm_mm, pmd, address, &ptl);

              print pte_pfn(*pte) and other debug info;

              pte_unmap_unlock(pte, ptl);
      }
}

The code hangs. I do not get anything in dmesg.
Any pointers by observing the code?

--
Cheers,
Anupama Chandwani
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