Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.6.134 2024-02-05T20:14:14+00:00 2024-02-05T20:14:14+00:00 Huang Shijie shijie@os.amperecomputing.com 2023-11-24T03:15:13+00:00 urn:sha1:40a5dce893f0ea46a208733984c90e6803bf2ed3 [ Upstream commit 75b5e0bf90bffaca4b1f19114065dc59f5cc161f ] In current code, init_irq_stacks() will call cpu_to_node(). The cpu_to_node() depends on percpu "numa_node" which is initialized in: arch_call_rest_init() --> rest_init() -- kernel_init() --> kernel_init_freeable() --> smp_prepare_cpus() But init_irq_stacks() is called in init_IRQ() which is before arch_call_rest_init(). So in init_irq_stacks(), the cpu_to_node() does not work, it always return 0. In NUMA, it makes the node 1 cpu accesses the IRQ stack which is in the node 0. This patch fixes it by: 1.) export the early_cpu_to_node(), and use it in the init_irq_stacks(). 2.) change init_irq_stacks() to __init function. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com> Link: https://lore.kernel.org/r/20231124031513.81548-1-shijie@os.amperecomputing.com Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 2021-01-14T23:08:55+00:00 Atish Patra atish.patra@wdc.com 2020-11-19T00:38:26+00:00 urn:sha1:ae3c107cd8bea82cb7cb427d9c5d305b8ce72216 ARM64 numa implementation is generic enough that RISC-V can reuse that implementation with very minor cosmetic changes. This will help both ARM64 and RISC-V in terms of maintanace and feature improvement Move the numa implementation code to common directory so that both ISAs can reuse this. This doesn't introduce any function changes for ARM64. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>