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(parent: a709423) | patch
s390/mm: avoid trimming to MAX_ORDER
authorHeiko Carstens <hca@linux.ibm.com>
Tue, 14 Jul 2020 05:46:40 +0000 (07:46 +0200)
committerHeiko Carstens <hca@linux.ibm.com>
Mon, 20 Jul 2020 08:55:32 +0000 (10:55 +0200)
commit3c5f2eb9695cd241c9898a01388b19a149d0b7d2
treea71a73963bfe622b0def696bc762911af28405eetree | snapshot
parenta709423f7a3a452e5fa7442425817c1bdccd7926commit | diff
s390/mm: avoid trimming to MAX_ORDER

Trimming to MAX_ORDER was originally done in order to avoid to set
HOLES_IN_ZONE, which in turn would enable a quite expensive
pfn_valid() check. pfn_valid() however only checks if a struct page
exists for a given pfn.

With sparsemen vmemmap there are always struct pages, since memmaps
are allocated for whole sections. Therefore remove the HOLES_IN_ZONE
comment and the trimming.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
arch/s390/kernel/setup.c diff | blob | history
Domain: System / Kernel;