Messages in this thread | | | Date | Fri, 8 Oct 2021 21:33:18 +0800 | Subject | Re: [PATCH v4 0/3] arm64: support page mapping percpu first chunk allocator | From | Kefeng Wang <> |
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On 2021/9/28 15:48, Kefeng Wang wrote: > Hi Catalin and Andrew, kindly ping again, any comments, thanks.
Looks no more comments, Catalin and Andrew, ping again, any one of you could merge this patchset, many thanks.
> > On 2021/9/10 13:33, Kefeng Wang wrote: >> Percpu embedded first chunk allocator is the firstly option, but it >> could fails on ARM64, eg, >> "percpu: max_distance=0x5fcfdc640000 too large for vmalloc space >> 0x781fefff0000" >> "percpu: max_distance=0x600000540000 too large for vmalloc space >> 0x7dffb7ff0000" >> "percpu: max_distance=0x5fff9adb0000 too large for vmalloc space >> 0x5dffb7ff0000" >> >> then we could meet "WARNING: CPU: 15 PID: 461 at vmalloc.c:3087 >> pcpu_get_vm_areas+0x488/0x838", >> even the system could not boot successfully. >> >> Let's implement page mapping percpu first chunk allocator as a fallback >> to the embedding allocator to increase the robustness of the system. >> >> Also fix a crash when both NEED_PER_CPU_PAGE_FIRST_CHUNK and >> KASAN_VMALLOC enabled. >> >> Tested on ARM64 qemu with cmdline "percpu_alloc=page" based on v5.14. >> >> V4: >> - add ACK/RB >> - address comments about patch1 from Catalin >> - add Greg and Andrew into list suggested by Catalin >> >> v3: >> - search for a range that fits instead of always picking the end from >> vmalloc area suggested by Catalin. >> - use NUMA_NO_NODE to avoid "virt_to_phys used for non-linear address:" >> issue in arm64 kasan_populate_early_vm_area_shadow(). >> - add Acked-by: Marco Elver <elver@google.com> to patch v3 >> >> V2: >> - fix build error when CONFIG_KASAN disabled, found by lkp@intel.com >> - drop wrong __weak comment from kasan_populate_early_vm_area_shadow(), >> found by Marco Elver <elver@google.com> >> >> Kefeng Wang (3): >> vmalloc: Choose a better start address in vm_area_register_early() >> arm64: Support page mapping percpu first chunk allocator >> kasan: arm64: Fix pcpu_page_first_chunk crash with KASAN_VMALLOC >> >> arch/arm64/Kconfig | 4 ++ >> arch/arm64/mm/kasan_init.c | 16 ++++++++ >> drivers/base/arch_numa.c | 82 +++++++++++++++++++++++++++++++++----- >> include/linux/kasan.h | 6 +++ >> mm/kasan/init.c | 5 +++ >> mm/vmalloc.c | 19 ++++++--- >> 6 files changed, 116 insertions(+), 16 deletions(-) >>
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