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([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id h12-20020a4ad28c000000b0035eb4e5a6b1sm5261607oos.7.2022.05.17.06.23.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 May 2022 06:23:22 -0700 (PDT) Sender: Guenter Roeck Message-ID: <973b908d-7098-cbae-8046-9a42cfabd570@roeck-us.net> Date: Tue, 17 May 2022 06:23:18 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [PATCH] mapletree-vs-khugepaged Content-Language: en-US To: Heiko Carstens , Liam Howlett Cc: Sven Schnelle , Andrew Morton , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" References: <20220428172040.GA3623323@roeck-us.net> <20220513165955.mkg5wvfi4dwpzoer@revolver> From: Guenter Roeck In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/17/22 04:53, Heiko Carstens wrote: > On Fri, May 13, 2022 at 05:00:31PM +0000, Liam Howlett wrote: >> * Sven Schnelle [220513 10:46]: >>> Heiko Carstens writes: >>>> FWIW, same on s390 - linux-next is completely broken. Note: I didn't >>>> bisect, but given that the call trace, and even the failing address >>>> match, I'm quite confident it is the same reason. >>> IS that issue supposed to be fixed? git bisect pointed me to >>> >>> # bad: [76535d42eb53485775a8c54ea85725812b75543f] Merge branch >>> 'mm-everything' of >>> git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm >>> >>> which isn't really helpful. >>> >>> Anything we could help with debugging this? >> >> I tested the maple tree on top of the s390 as it was the same crash and >> it was okay. I haven't tested the mm-everything branch though. Can you >> test mm-unstable? >> >> I'll continue setting up a sparc VM for testing here and test >> mm-everything on that and the s390 > > So due to reports here I did some sort of "special bisect": with today's > linux-next I did a hard reset to commit 562340595cbb ("Merge branch > 'for-next/kspp' of > git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git"), > started a bisect on Andrew's tree between mm-stable and mm-unstable, and > merged whatever commit was about to be bisected into 562340595cbb. > > This lead finally to commit f1297d3a2cb7 ("mm/mmap: reorganize munmap to > use maple states") as "first bad commit". > > So given that we are shortly before the merge window and linux-next is > completely broken for s390, how do we proceed? Right now I have no idea if > there is anything else in linux-next that would break s390 because of this. > > Even though I'm sure you won't like to hear this, but I'd appreciate if > this code could be removed from linux-next again. I finally found some time to bisect the alpha boot failures in -next. Bisect results below. Guenter --- # bad: [47c1c54d1bcd0a69a56b49473bc20f17b70e5242] Add linux-next specific files for 20220517 # good: [42226c989789d8da4af1de0c31070c96726d990c] Linux 5.18-rc7 git bisect start 'HEAD' 'v5.18-rc7' # good: [27d9fca0814b912f762dd5adeb81d9ab250705a9] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git git bisect good 27d9fca0814b912f762dd5adeb81d9ab250705a9 # good: [c57a4cecd8f02b365109fc326c7cde5ec6020a54] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git bisect good c57a4cecd8f02b365109fc326c7cde5ec6020a54 # good: [0389ffdcdd4eacf5cfcef2a5e25b49a1662f8a8b] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git git bisect good 0389ffdcdd4eacf5cfcef2a5e25b49a1662f8a8b # good: [c506c5c327711f8bb522c10262ec3a932fe91cd2] Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux.git git bisect good c506c5c327711f8bb522c10262ec3a932fe91cd2 # bad: [b24964a75c5c0129fd6a0d9bcb0fb6e84fbac126] mm/mmap: drop range_has_overlap() function git bisect bad b24964a75c5c0129fd6a0d9bcb0fb6e84fbac126 # good: [3cbab4ca1ea8752912d8719d72059869b4c18045] mm/damon/sysfs: use enum for 'state' input handling git bisect good 3cbab4ca1ea8752912d8719d72059869b4c18045 # good: [9113eaf331bf44579882c001867773cf1b3364fd] mm/memory-failure.c: add hwpoison_filter for soft offline git bisect good 9113eaf331bf44579882c001867773cf1b3364fd # good: [2b2adc303cebc213072520eb2e86e4beb65e9499] mm: remove rb tree. git bisect good 2b2adc303cebc213072520eb2e86e4beb65e9499 # bad: [bbd9f664c351fbe61afa949abaaa03aed5c84af9] fs/proc/task_mmu: stop using linked list and highest_vm_end git bisect bad bbd9f664c351fbe61afa949abaaa03aed5c84af9 # bad: [3b150cc8ab608f7a7da76b036b0ba7513628b0be] arm64: remove mmap linked list from vdso git bisect bad 3b150cc8ab608f7a7da76b036b0ba7513628b0be # good: [282a3e65bd1dece042bb8cf3a1666d79af1553b0] mm: use maple tree operations for find_vma_intersection() git bisect good 282a3e65bd1dece042bb8cf3a1666d79af1553b0 # good: [d175d2cc268623e3e68181235a4aa068b50a8213] mm: convert vma_lookup() to use mtree_load() git bisect good d175d2cc268623e3e68181235a4aa068b50a8213 # bad: [f1297d3a2cb77261c10fbbd69d92bbca700108e0] mm/mmap: reorganize munmap to use maple states git bisect bad f1297d3a2cb77261c10fbbd69d92bbca700108e0 # good: [a897bb88e1e61df70f350a51f51cade3930adc3c] mm/mmap: move mmap_region() below do_munmap() git bisect good a897bb88e1e61df70f350a51f51cade3930adc3c # first bad commit: [f1297d3a2cb77261c10fbbd69d92bbca700108e0] mm/mmap: reorganize munmap to use maple states