Re: [PATCH]: Adding a counter in vma to indicate the number ofphysical pages backing it

[Andrew Morton]

On Fri, 09 Jun 2006 18:33:55 -0700
Rohit Seth <rohitseth@xxxxxxxxxx> wrote:

> Below is a patch that adds number of physical pages that each vma is
> using in a process.  Exporting this information to user space
> using /proc/<pid>/maps interface.

Ouch, that's an awful lot of open-coded incs and decs.  Isn't there some
more centralised place we can do this?

What locking protects vma.nphys (can we call this nr_present or something?)

Will this patch do the right thing with weird vmas such as the gate vma and
mmaps of device memory, etc?

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