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Ran 07 Jun 2017 04:19PM UTC

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Committed 07 Jun 2017 03:56PM UTC coverage: 64.606% (+0.001%) from 64.605%

Job # TR_ARCH=local GCOV=1

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push

travis-ci

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0x7f454c46

Commit Message

kdat: Add test for presence of vdso mapping API

Previously, arch_prctl(ARCH_MAP_VDSO_32) was only used by
CONFIG_COMPAT to map compatible vdso blob for 32-bit restoree.
But we can make it more generic:
Omitting mremap() for moving vdso to rt-vdso zone in restorer
and afterward on needed position in restoree.
Also omitting reading /proc/self/maps to find vdso/vvar
addresses (to park afterward in restorer).

TLDR; under this kdat feature we can get rid of a buch of mremap()'s
for each restoree and from parsing /proc/self/maps in vdso_init_restore().

The API is present from v4.9 kernel.

Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>

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