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| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2020-03-08 23:34:49 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-03-23 15:41:53 +0300 |
| commit | 31932757c6121b394cd4f158b6b8f1cca8ffe871 (patch) | |
| tree | ea17b9d5dcfde12cdf13b659ad05d5b8d4a8fbbe /security/lockdown | |
| parent | bb533ec8bacd064ee273ca3305db97938c3331ae (diff) | |
| download | linux-31932757c6121b394cd4f158b6b8f1cca8ffe871.tar.xz | |
s390/mm: optimize page table upgrade routine
There is a maximum of two new tables allocated on page table
upgrade. Because we know that a loop the current implementation
is based on could be unrolled with some improvements:
* upgrade from 3 to 5 levels happens in one go - without an
unnecessary re-take of page_table_lock in-between;
* page tables initialization moved out of the atomic code;
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'security/lockdown')
0 files changed, 0 insertions, 0 deletions