diff options
| author |   Vasily Gorbik <gor@linux.ibm.com> | 2018-09-13 16:09:52 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-09 11:21:34 +0200 |
| commit | 12e55fa1944d2f2f15c580a94eda80cb7623f89d (patch) | |
| tree | 533880bb716fbf6584d4d01d0f76594204befa56 /arch/s390/mm | |
| parent | s390/kasan: avoid kasan crash with standby memory defined (diff) | |
| download | linux-dev-12e55fa1944d2f2f15c580a94eda80cb7623f89d.tar.xz linux-dev-12e55fa1944d2f2f15c580a94eda80cb7623f89d.zip | |
s390/kasan: optimize kasan vmemmap allocation
Kasan implementation now supports memory hotplug operations. For that
reason regions of initially standby memory are now skipped from
shadow mapping and are mapped/unmapped dynamically upon bringing
memory online/offline.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/kasan_init.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/mm/kasan_init.c b/arch/s390/mm/kasan_init.c index 6b0574340f7f..5b253247bc97 100644 --- a/arch/s390/mm/kasan_init.c +++ b/arch/s390/mm/kasan_init.c @@ -331,7 +331,8 @@ void __init kasan_early_init(void) kasan_early_vmemmap_populate(__sha(0), __sha(memsize), POPULATE_MAP); if (IS_ENABLED(CONFIG_MODULES)) untracked_mem_end = vmax - MODULES_LEN; - kasan_early_vmemmap_populate(__sha(memsize), __sha(untracked_mem_end), + kasan_early_vmemmap_populate(__sha(max_physmem_end), + __sha(untracked_mem_end), POPULATE_ZERO_SHADOW); /* memory allocated for identity mapping structs will be freed later */ pgalloc_freeable = pgalloc_pos; |