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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-05-10 12:10:22 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-05-11 10:20:30 +0200 |
| commit | c34a69059d7876e0793eb410deedfb08ccb22b02 (patch) | |
| tree | 18d24e5fd7a5f8e881467035e3e61368d1834adb /arch/s390/pci | |
| parent | ca21872e43e82c2a5c2e056ee4aea40a921720b1 (diff) | |
s390/vmem: fix identity mapping
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>
Diffstat (limited to 'arch/s390/pci')
0 files changed, 0 insertions, 0 deletions