Re: Getting struct page pointer from virtual address
More information : - Linux kernel version : 2.6.32 (But I would like a method which is portable to other higher versions as well) - I tried using follow_page, but this function is not exported from the kernel so, can't use it. (Any reason why this function is not exported??) Thanks Ajay ________________________________ From: ajay saini <ajay_saini1006@yahoo.co.in> To: "kernelnewbies@kernelnewbies.org" <kernelnewbies@kernelnewbies.org> Sent: Tuesday, 3 September 2013 1:21 PM Subject: Getting struct page pointer from virtual address Hey, I am working on a linux kernel module and I have a virtual address and mm (struct mm_struct) for a process in this module. I can find the virtaul memory area to which this address belongs to by using find_vma. Is there a function in the linux kernel which I can use in this module (i.e. exported from the kernel) to get struct page pointer for this virtual address. Thanks Ajay
I think there is no exported function for that, but there is a global variable for that. Reason being for performance - the action virt_to_phys() is a macro to be compiled inline and more details here: http://stackoverflow.com/questions/5982125/how-to-get-a-struct-page-from-any... On Wed, Sep 4, 2013 at 1:29 AM, ajay saini <ajay_saini1006@yahoo.co.in>wrote:
More information : - Linux kernel version : 2.6.32 (But I would like a method which is portable to other higher versions as well) - I tried using follow_page, but this function is not exported from the kernel so, can't use it. (Any reason why this function is not exported??)
Thanks Ajay
------------------------------ *From:* ajay saini <ajay_saini1006@yahoo.co.in> *To:* "kernelnewbies@kernelnewbies.org" <kernelnewbies@kernelnewbies.org> *Sent:* Tuesday, 3 September 2013 1:21 PM *Subject:* Getting struct page pointer from virtual address
Hey,
I am working on a linux kernel module and I have a virtual address and mm (struct mm_struct) for a process in this module. I can find the virtaul memory area to which this address belongs to by using find_vma.
Is there a function in the linux kernel which I can use in this module (i.e. exported from the kernel) to get struct page pointer for this virtual address.
Thanks Ajay
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