Messages in this thread | | | Date | Mon, 9 Sep 2019 18:22:42 +0200 | From | Thomas Bogendoerfer <> | Subject | Re: [PATCH] mips: sgi-ip27: switch from DISCONTIGMEM to SPARSEMEM |
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On Fri, 6 Sep 2019 16:02:24 +0300 Mike Rapoport <rppt@kernel.org> wrote:
> I suspect that unaligned access comes from __page_to_pfn, can you please > check what scripts/fadd2line reports for kernel_init_free_pages+0xcc/0x138?
kernel_init_free_pages+0xcc/0x138: pagefault_disabled_dec at include/linux/uaccess.h:173 (inlined by) pagefault_enable at include/linux/uaccess.h:200 (inlined by) __kunmap_atomic at include/linux/highmem.h:101 (inlined by) clear_highpage at include/linux/highmem.h:215 (inlined by) kernel_init_free_pages at mm/page_alloc.c:1124
While making some sense out of this I booted the system a few times with the same kernel and I get different crashes (it even booted once to userspace).
Here a list (decoded with fadd2line)
cache_grow_begin+0x1bc/0x4b8: __section_mem_map_addr at include/linux/mmzone.h:1263 (inlined by) lowmem_page_address at include/linux/mm.h:1302 (inlined by) alloc_slabmgmt at mm/slab.c:2298 (inlined by) cache_grow_begin at mm/slab.c:2625
kfree+0x90/0x1d0: __section_mem_map_addr at include/linux/mmzone.h:1263 (inlined by) virt_to_head_page at include/linux/mm.h:751 (inlined by) virt_to_cache at mm/slab.h:408 (inlined by) kfree at mm/slab.c:3748
kfree+0xac/0x1d0: __read_once_size at include/linux/compiler.h:199 (inlined by) compound_head at include/linux/page-flags.h:174 (inlined by) virt_to_head_page at include/linux/mm.h:753 (inlined by) virt_to_cache at mm/slab.h:408 (inlined by) kfree at mm/slab.c:3748
___cache_free+0x120/0x540: page_to_nid at include/linux/mm.h:1088 (inlined by) cache_free_alien at mm/slab.c:785 (inlined by) ___cache_free at mm/slab.c:3449
free_block+0xe8/0x2c0: __read_once_size at include/linux/compiler.h:199 (inlined by) compound_head at include/linux/page-flags.h:174 (inlined by) virt_to_head_page at include/linux/mm.h:753 (inlined by) free_block at mm/slab.c:3342
copy_process+0x254/0x1738: __section_mem_map_addr at include/linux/mmzone.h:1263 (inlined by) lowmem_page_address at include/linux/mm.h:1302 (inlined by) alloc_thread_stack_node at kernel/fork.c:252 (inlined by) dup_task_struct at kernel/fork.c:855 (inlined by) copy_process at kernel/fork.c:1856
I couldn't make real sense out of this yet, but maybe it gives a hint for you.
Thomas.
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