Re: [PATCH 4/5] pagemap: Introduce the /proc/PID/pagemap2 file

[Andrew Morton]

On Thu, 11 Apr 2013 15:29:41 +0400 Pavel Emelyanov <xemul@xxxxxxxxxxxxx> wrote:

> This file is the same as the pagemap one, but shows entries with bits
> 55-60 being zero (reserved for future use). Next patch will occupy one
> of them.

I'm not understanding the motivation for this.  What does the current
/proc/pid/pagemap have in those bit positions?

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