Messages in this thread | | | From | Kefeng Wang <> | Subject | [PATCH v3 0/3] arm64: mm: Do not defer reserve_crashkernel() | Date | Mon, 11 Apr 2022 17:24:52 +0800 |
| |
Commit 031495635b46 ("arm64: Do not defer reserve_crashkernel() for platforms with no DMA memory zones"), this lets the kernel benifit due to BLOCK_MAPPINGS, we could do more if ZONE_DMA and ZONE_DMA32 enabled.
1) Don't defer reserve_crashkernel() if only ZONE_DMA32 2) Don't defer reserve_crashkernel() if ZONE_DMA with dma_force_32bit kernel parameter(newly added)
Here is another case to show the benefit of the block mapping.
Unixbench benchmark result shows between the block mapping and page mapping. ----------------+------------------+------------------- | block mapping | page mapping ----------------+------------------+------------------- Process Creation| 5,030.7 | 4,711.8 (in unixbench) | | ----------------+------------------+-------------------
note: RODATA_FULL_DEFAULT_ENABLED is not enabled
v3: - renaming crashkernel_could_early_reserve() to crashkernel_early_reserve() - drop dma32_phys_limit, directly use max_zone_phys(32) - fix no previous prototype issue - add RB of Vijay to patch2/3 v2 resend: - fix build error reported-by lkp v2: - update patch1 according to Vijay and Florian, and RB of Vijay - add new patch2
Kefeng Wang (3): arm64: mm: Do not defer reserve_crashkernel() if only ZONE_DMA32 arm64: mm: Don't defer reserve_crashkernel() with dma_force_32bit arm64: mm: Cleanup useless parameters in zone_sizes_init()
arch/arm64/include/asm/kexec.h | 1 + arch/arm64/mm/init.c | 60 ++++++++++++++++++++++++---------- arch/arm64/mm/mmu.c | 6 ++-- 3 files changed, 46 insertions(+), 21 deletions(-)
-- 2.26.2
| |