[CRIU] [PATCH] kerndat: initialize zero_page_pfn to -1

[Cyrill Gorcunov]

On Fri, Apr 29, 2016 at 09:17:49PM +0300, Andrey Vagin wrote:
> From: Andrew Vagin <avagin at virtuozzo.com>
> 
> zero_page_pfn should be invalid if it isn't set to a real value.
> 
> zero is bad, because pagemap returns zero pfn-s for non-root users.
> 
> $ python test/zdtm.py run -t zdtm/static/env00 -k always -f h --user --norst
> ========================== Run zdtm/static/env00 in h ==========================
> Start test
> ./env00 --pidfile=env00.pid --outfile=env00.out --envname=ENV_00_TEST
> Run criu dump
> Wait for zdtm/static/env00 to die for 0.100000
> ========================= Test zdtm/static/env00 PASS ==========================
> 
> $ ./crit/crit show test/dump/zdtm/static/env00/24/1/pagemap-24.img
> {
>     "magic": "PAGEMAP",
>     "entries": [
>         {
>             "pages_id": 1
>         },
>         {
>             "vaddr": "0x7ffcfd5ed000",
>             "nr_pages": 2
>         }
>     ]
> }
> 
> Signed-off-by: Andrew Vagin <avagin at virtuozzo.com>
Acked-by: Cyrill Gorcunov <gorcunov at openvz.org>