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bh=OG/xEeMW6SfAS15OFSbLN3BYUgHdEYvM68dgZ0naShU=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=PP/OZWcWZ8MW6ZtRcH+WeVbJtDXEOMS3uwwY7Lq7eX2luqZtT++2w6Xfkfz/qDyWO V0BbtxGHWNwXargDfWWhG9zNsM8CnBkVdY9oP0FH1qHLGz1qWeUMmi9KM87tX72N47 4pnLUrZwoZoRAxG24vigrbjcnnW3KgORV0uA4sZU= Date: Tue, 31 Jan 2023 14:45:38 -0800 From: Andrew Morton To: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: linux-mm@kvack.org, Huang Ying , Zi Yan , Yang Shi , Baolin Wang , Oscar Salvador , Matthew Wilcox , Bharata B Rao , Alistair Popple , haoxin , Minchan Kim Subject: Re: [BISECTED] first bad commit is c203c6d5b3f0597 ("migrate_pages: batch _unmap and _move") Message-Id: <20230131144538.1a9f84b6781bed0c251d54f7@linux-foundation.org> In-Reply-To: References: X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 10E671C0004 X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: xpxqzc6w1k4u9ggqni5sguciqhndiqgj X-HE-Tag: 1675205140-54157 X-HE-Meta: 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 SdT8x5K7 vzwFyLVHL9vzSIPdWqheJV8l1sKMEdCsKxZnVvXvqaro/N1hGXLQe/AeY62aXRP1yK5IcP57ZpC/doi5BqJhqRsNJMOHNlz53PrLXoW3grREYTcLEMEtUxyuyajeIGJkvqtx304BuLVTRjXYx8v9aK92ZzDrYJRKM1UxePUUZ8yCcHPzcJMvvRPBE46qMpFDqEUtkqFLlqNzYZwMEOEzEf5XGKOycdz+dlo3bkRPM/8Gjb1JPLrbig3UYz6xC9RhS233O3AIkTkTZj4AlG2xqRRVdj5u9Xy7FuuNTvv6y3tRwy+Y/h4iG8M46RgMObUPdrcBPi14Ng/8By2ZrFM/bcotN4U10r8B32MwCfeqioM5O3AhpYZkg5y0yW/OZHn2Zddvu9KBH9+Kz90O3SVnpR71up1lLObw2k1zJdKrJn9q8Esu9U8U/c692FGPI04luoI7oepWlRNXMMP4YfMDOItdW0B6fW5YzcUDIm1H67QAm1+U= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, 1 Feb 2023 02:35:55 +0900 Hyeonggon Yoo <42.hyeyoo@gmail.com> wrote: > On Wed, Feb 01, 2023 at 01:09:10AM +0900, Hyeonggon Yoo wrote: > > I've observed random list_del corruption on mm-unstable, > > where HEAD is commit d69862e693c069f4 > > ("mm/migrate: convert putback_movable_pages() to use folios"). > > > > The issue can be easily reproduced by stressing MM multiple times: > > stress-ng --bigheap 0 --timeout 300 > > > > The compiler is gcc 12.2.1 and config, dmesg are included as attachment. > > I will try to bisect but can't promise quick resolution :) > > > The first bad commits appears to be: > c203c6d5b3f0597 ("migrate_pages: batch _unmap and _move") > > the first bad commit _probably_ be earlier, but this is quite > easy to reproduce so at this point I think above is the real bad commit. Thanks. I'll disable this series for now, so it won't appear in linux-next.