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To: "Nicholas Piggin" Cc: , Christophe Leroy Subject: Re: BUG: Bad page map in process init pte:c0ab684c pmd:01182000 (on a PowerMac G4 DP) Message-ID: <20221231182216.1d3e6cf2@yea> In-Reply-To: References: <20221130224402.15c0cf8b@yea> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-MBO-RS-META: rr5ta5jpod746nhqm95hfxc6aujo9e3c X-MBO-RS-ID: 5b452d566b1ef9417c1 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 281578000E X-Rspam-User: X-Stat-Signature: 9e1ugua745zobhpwhsbqztbdh4q7bd3k X-HE-Tag: 1672507343-644929 X-HE-Meta: U2FsdGVkX19Zt+KxeO4kR+nwuf/aoCHPdcZ6og5DQBYgljjRRL3EKshiry0UcA3AkN4doRq6H8P4AK4B2/fmyGwBofXiTeILmAo19G1gFroC+v6zO8UuLEVTD80dKyLzlL+ZtpE27oSPIw2n76pInEeMPxt8SzK0MInBkhMhHKSeIJImAPm2768TnWvzu30iyRHIyMxP5WoSOv3o03dI5bQG6XtbOHsldKJ1NGD2FIBjDQcTlGAY3YE7JI4Ivf0yCfNafolSmU23EQDPzILkSJkVnPWWFxGJ2nNMijzEvwciiQLprnFQsWveN9DTSVqAeMKykqjHIRDB8LLu6CJe6YaSuhUoXsflNDtvwBQe70vrEHV/0movV7VSIfBfgyUSD3ng59t7IKW8JobdM3wd328kuK+t9bdI+yLXBJVPX6/cPuJ8BVv6mWPuxLUWeUmNmMMraPrr1ibxC9wi6NlJWIgAMZW0B4SrPKadXQn4DzzgE7GzdetrYMlLVnmJn+zUuLtZ5OgcUvXYXMbyiLmcmxGon1uGIakCuhNOSZZpKR+P4AS6cma1+zayMM+uabPnvcg6434StDmn+6MulOEuUVwbVYR1TxTS7ibllBfXoPxBAeEM+8GAzUhuYTgCpVMI6rsG351qeqEvQ/cPloc5UPxlqijlPxKhQolq3Ra3Hq2x4X0/3YmayJm967yAXjRPDxIO8N19qrkqyl2yvqcqvqfQnqo7xihR69Xe0oJUMqG29getC1Jb05kBxP0aN3700DXW3W+klEWWWNCZcsgpk0xVKOIRj/loMSPIBy43cifPWy79wjO6hg5s8SeUBf+uyQsyo3Msz/GFUr2a9nTsbNeqX7Tunceeef2Mob5SZKclT9HPaj/phg== 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 Mon, 12 Dec 2022 14:31:35 +1000 "Nicholas Piggin" wrote: > Have you run memtest on the system? Are the messages related to a > kernel upgrade? This and your KASAN bugs look possibly like random > corruption. Found out that 'stress -m2 --vm-bytes 965M' and 'memtester 1930M' run fine for hours as long I have VMAP_STACK disabled when using SMP=y. So I can use either SMP=y or VMAP_STACK=y and everything is fine. But when I use both at the same time I get this kind of memory corruption. Probably this has something to do with (or is?) the issue I originally reported as https://bugzilla.kernel.org/show_bug.cgi?id=215389 only that I now found out to provoke the issue much faster and more reliable with stress and memtester instead of a full glibc test build on the G4... Any hints for further testing? Could do a bisect again with a more minimalistic kernel and see if I get the same result as in the old bug if that would be helpful. Regards, Erhard