diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-05-10 12:10:22 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 06:39:34 +0200 |
| commit | 0fb2a1fe6155547d8a8234ad5f19e5fd53621c82 (patch) | |
| tree | ecae347f94fbce37b36978dc573ef053d817ee51 /block | |
| parent | 30c9187fa8ed958e618d2df322b1e4fd5dc591fc (diff) | |
s390/vmem: fix identity mapping
commit c34a69059d7876e0793eb410deedfb08ccb22b02 upstream.
The identity mapping is suboptimal for the last 2GB frame. The mapping
will be established with a mix of 4KB and 1MB mappings instead of a
single 2GB mapping.
This happens because of a off-by-one bug introduced with
commit 50be63450728 ("s390/mm: Convert bootmem to memblock").
Currently the identity mapping looks like this:
0x0000000080000000-0x0000000180000000 4G PUD RW
0x0000000180000000-0x00000001fff00000 2047M PMD RW
0x00000001fff00000-0x0000000200000000 1M PTE RW
With the bug fixed it looks like this:
0x0000000080000000-0x0000000200000000 6G PUD RW
Fixes: 50be63450728 ("s390/mm: Convert bootmem to memblock")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions