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| author | Catalin Marinas <catalin.marinas@arm.com> | 2023-10-05 18:40:30 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2023-10-13 18:10:39 +0300 |
| commit | 65033574ade97afccba074d837fd269903a83a9a (patch) | |
| tree | b6124c5c373f37bb368bd18f0089fb44c048c8de /scripts/Makefile.ubsan | |
| parent | 6465e260f48790807eef06b583b38ca9789b6072 (diff) | |
| download | linux-65033574ade97afccba074d837fd269903a83a9a.tar.xz | |
arm64: swiotlb: Reduce the default size if no ZONE_DMA bouncing needed
With CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC enabled, the arm64 kernel still
allocates the default SWIOTLB buffer (64MB) even if ZONE_DMA is disabled
or all the RAM fits into this zone. However, this potentially wastes a
non-negligible amount of memory on platforms with little RAM.
Reduce the SWIOTLB size to 1MB per 1GB of RAM if only needed for
kmalloc() buffer bouncing.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Suggested-by: Ross Burton <ross.burton@arm.com>
Cc: Ross Burton <ross.burton@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'scripts/Makefile.ubsan')
0 files changed, 0 insertions, 0 deletions