s390/mm: check 2KB-fragment page on release

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When CONFIG_DEBUG_VM is defined check that pending remove
and tracking nibbles (bits 31-24 of the page refcount) are
cleared. Should the earlier stages of the page lifespan
have a race or logical error, such check could help in
exposing the issue.

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

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Alexander Gordeev 2021-11-04 07:14:46 +01:00 • committed by Heiko Carstens

parent 1194372db6

commit 4c88bb96e4

1 changed files with 30 additions and 11 deletions

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arch/s390/mm/pgalloc.c

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