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Message-ID: <C1636974-A315-4E0A-81C2-845878429920@nvidia.com>
Date: Fri, 20 May 2022 17:56:52 -0400
From: Zi Yan <ziy@...dia.com>
To: Qian Cai <quic_qiancai@...cinc.com>
Cc: David Hildenbrand <david@...hat.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org,
virtualization@...ts.linux-foundation.org,
Vlastimil Babka <vbabka@...e.cz>,
Mel Gorman <mgorman@...hsingularity.net>,
Eric Ren <renzhengeek@...il.com>,
Mike Rapoport <rppt@...nel.org>,
Oscar Salvador <osalvador@...e.de>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v11 0/6] Use pageblock_order for cma and alloc_contig_range alignment.
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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