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zdtm: thp_disable: Verify MADV_NOHUGEPAGE before migration

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Add a sanity check for THP_DISABLE. This discovered a broken commit
in Google's kernel tree.

Signed-off-by: Michał Mirosław <emmir@google.com>
This commit is contained in:
Michał Mirosław
2023-06-02 19:01:29 +02:00
committed by Andrei Vagin
parent 6006cb6eaf
commit c75c017e4c
1 changed files with 15 additions and 0 deletions
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15
test/zdtm/static/thp_disable.c
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@@ -47,6 +47,21 @@ int main(int argc, char **argv)
return -1; return -1;
} }
test_msg("Fetch pre-migration flags/adv\n");
if (get_smaps_bits((unsigned long)area, &new_flags, &new_madv))
return -1;
errno = 0;
if (orig_flags != new_flags) {
fail("Flags changed %lx -> %lx\n", orig_flags, new_flags);
return -1;
}
if (orig_madv != new_madv) {
fail("Madvs changed %lx -> %lx\n", orig_madv, new_madv);
return -1;
}
test_daemon(); test_daemon();
test_waitsig(); test_waitsig();