Content of Kernelnewbies...

[pushpendra.singh at smartplayin.com]

-----Original Message-----
From: kernelnewbies-request at kernelnewbies.org
Sent: Tuesday, 11 November, 2014 10:30pm
To: kernelnewbies at kernelnewbies.org
Subject: Kernelnewbies Digest, Vol 48, Issue 13

Send Kernelnewbies mailing list submissions to
	kernelnewbies at kernelnewbies.org

To subscribe or unsubscribe via the World Wide Web, visit
	http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
or, via email, send a message with subject or body 'help' to
	kernelnewbies-request at kernelnewbies.org

You can reach the person managing the list at
	kernelnewbies-owner at kernelnewbies.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Kernelnewbies digest..."


Today's Topics:

   1. Confusion about __do_fault and MM_ANONPAGES (Joel Fernandes)


----------------------------------------------------------------------

Message: 1
Date: Mon, 10 Nov 2014 16:23:57 -0800
From: Joel Fernandes <agnel.joel at gmail.com>
Subject: Confusion about __do_fault and MM_ANONPAGES
To: Linux Kernel Mailing List <linux-kernel at vger.kernel.org>,
	"kernelnewbies at kernelnewbies.org" <kernelnewbies at kernelnewbies.org>
Cc: Andrew Morton <akpm at linux-foundation.org>
Message-ID:
	<CAD=GYpYqbTrJ-wTZy=UBX1Z5=zMGVoaYU8jSa81rrcC4G0271w at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Hi,

I have some confusion about when is anon=1 when __do_fault is called.

__do_fault seems to be called only when the page fault is of a linear
or a non-linear mapping. My understanding is neither of these can be
anonymous, so I am confused about the below code fragment:

In which case is anon=1 when memory.c::__do_fault is called?
In __do_fault, you'll see something like...
        if (anon) {
            inc_mm_counter_fast(mm, MM_ANONPAGES);
            page_add_new_anon_rmap(page, vma, address);
        } else {


Thanks!
Joel



------------------------------

_______________________________________________
Kernelnewbies mailing list
Kernelnewbies at kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies


End of Kernelnewbies Digest, Vol 48, Issue 13
*********************************************