[CRIU] [RFC] shmem: Swap out anonymous shared pages before reading pagemap

[Cyrill Gorcunov]

On Fri, Sep 16, 2016 at 04:17:47PM +0300, Cyrill Gorcunov wrote:
> When pages are swapped out we can't detect their presence with mincore
> or pagemap. Instead lest do a walk over pagerange and read first byte
> calling swap out procedure and then used pagemap to filter out clean pages.
> 
> https://jira.sw.ru/browse/PSBM-52138
> 
> Suggested-by: Andrei Vagin <avagin at openvz.org>
> Signed-off-by: Cyrill Gorcunov <gorcunov at virtuozzo.com>

Drop it.