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Log if prctl(SET_THP_DISABLE) doesn't work as expected.

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If prctl(SET_THP_DISABLE) is not used due to bad semantics, log it
for easier debugging.

Signed-off-by: Michał Mirosław <emmir@google.com>
This commit is contained in:
Michał Mirosław
2023-06-02 17:22:06 +02:00
committed by Andrei Vagin
parent 21ce76263b
commit 2364c963c6
1 changed files with 2 additions and 0 deletions
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criu/kerndat.c
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@@ -1324,6 +1324,8 @@ int kerndat_has_thp_disable(void)
parse_vmflags(str, &flags, &madv, &io_pf); parse_vmflags(str, &flags, &madv, &io_pf);
kdat.has_thp_disable = !(madv & (1 << MADV_NOHUGEPAGE)); kdat.has_thp_disable = !(madv & (1 << MADV_NOHUGEPAGE));
if (!kdat.has_thp_disable)
pr_warn("prctl PR_SET_THP_DISABLE sets MADV_NOHUGEPAGE");
break; break;
} }
} }