[CRIU] [PATCH cr] dump: save all vdso pages (v2)

[Andrey Vagin]

If a vdso page was not accessed before dump, it's not present
and now it doesn't save in a dump image.
The vdso area is restored as VMA_ANON, it isn't an actual vdso more,
so when a not-present vdso page is accessed, a zero page would be mapped.

For this reason we should save all vdso pages in a image.

v2: make code more clear

Signed-off-by: Andrey Vagin <avagin at openvz.org>
---
 parasite.c |   18 ++++++++++++------
 1 files changed, 12 insertions(+), 6 deletions(-)

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