Alexander Gordeev 05a8ba5c1e s390/boot: always align vmalloc area on segment boundary
[ Upstream commit 65f8780e2d70257200547b5a7654974aa7c37ce1 ]

The size of vmalloc area depends from various factors
on boot and could be set to:

1. Default size as determined by VMALLOC_DEFAULT_SIZE macro;
2. One half of the virtual address space not occupied by
   modules and fixed mappings;
3. The size provided by user with vmalloc= kernel command
   line parameter;

In cases [1] and [2] the vmalloc area base address is aligned
on Region3 table type boundary, while in case [3] in might get
aligned on page boundary.

Limit the waste of page tables and always align vmalloc area
size and base address on segment boundary.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-02-05 20:14:16 +00:00
..
2023-07-03 11:19:42 +02:00
2022-05-06 20:45:15 +02:00
2023-06-16 11:08:09 +02:00