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| author | Ma Wupeng <mawupeng1@huawei.com> | 2022-06-14 17:21:56 +0800 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2022-06-15 12:14:33 +0200 |
| commit | 902c2d91582c7ff0cb5f57ffb3766656f9b910c6 (patch) | |
| tree | 23ecc9193e48b64428a3eb054cc660a68645955a /mm/page_alloc.c | |
| parent | c0b978fedff685c9fdf91a46a6f026ac49d99591 (diff) | |
| download | lwn-902c2d91582c7ff0cb5f57ffb3766656f9b910c6.tar.gz lwn-902c2d91582c7ff0cb5f57ffb3766656f9b910c6.zip | |
memblock: Disable mirror feature if kernelcore is not specified
If system have some mirrored memory and mirrored feature is not specified
in boot parameter, the basic mirrored feature will be enabled and this will
lead to the following situations:
- memblock memory allocation prefers mirrored region. This may have some
unexpected influence on numa affinity.
- contiguous memory will be split into several parts if parts of them
is mirrored memory via memblock_mark_mirror().
To fix this, variable mirrored_kernelcore will be checked in
memblock_mark_mirror(). Mark mirrored memory with flag MEMBLOCK_MIRROR iff
kernelcore=mirror is added in the kernel parameters.
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220614092156.1972846-6-mawupeng1@huawei.com
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e008a3df0485..10dc35ec7479 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -356,7 +356,7 @@ static unsigned long required_kernelcore_percent __initdata; static unsigned long required_movablecore __initdata; static unsigned long required_movablecore_percent __initdata; static unsigned long zone_movable_pfn[MAX_NUMNODES] __initdata; -static bool mirrored_kernelcore __meminitdata; +bool mirrored_kernelcore __initdata_memblock; /* movable_zone is the "real" zone pages in ZONE_MOVABLE are taken from */ int movable_zone; |