On 20 May 2022, at 15:41, Qian Cai wrote: > On Fri, May 20, 2022 at 10:13:51AM -0400, Zi Yan wrote: >> Also, do you mind providing the page dump of the 512-page compound page? I would like >> to know what page caused the issue. > > page last allocated via order 9, migratetype Movable, gfp_mask 0x3c24ca(GFP_TRANSHUGE|__GFP_THISNODE), pid 831, tgid 831 (khugepaged), ts 3899865924520, free_ts 3821953009040 > post_alloc_hook > get_page_from_freelist > __alloc_pages > khugepaged_alloc_page > collapse_huge_page > khugepaged_scan_pmd > khugepaged_scan_mm_slot > khugepaged > kthread > ret_from_fork > page last free stack trace: > free_pcp_prepare > free_unref_page > free_compound_page > free_transhuge_page > __put_compound_page > release_pages > free_pages_and_swap_cache > tlb_batch_pages_flush > tlb_finish_mmu > exit_mmap > __mmput > mmput > exit_mm > do_exit > do_group_exit > __arm64_sys_exit_group Do you have the page information like refcount, map count, mapping, index, and page flags? That would be more helpful. Thanks. I cannot reproduce it locally after hundreds of iterations of flip_mem.py on my x86_64 VM and bare metal. What ARM machine are you using? I wonder if I am able to get one locally. Thanks. -- Best Regards, Yan, Zi
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