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Fri, 9 Aug 2024 15:14:40 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id AALaOWAytma2IAAAD6G6ig (envelope-from ); Fri, 09 Aug 2024 15:14:40 +0000 Message-ID: Date: Fri, 9 Aug 2024 17:14:40 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [-next conflict imminent] Re: [PATCH v2 0/7] mm, slub: handle pending kfree_rcu() in kmem_cache_destroy() Content-Language: en-US To: Jann Horn Cc: "Paul E. McKenney" , Joel Fernandes , Josh Triplett , Boqun Feng , Christoph Lameter , David Rientjes , Stephen Rothwell , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Julia Lawall , Jakub Kicinski , "Jason A. Donenfeld" , "Uladzislau Rezki (Sony)" , Andrew Morton , Roman Gushchin , Hyeonggon Yoo <42.hyeyoo@gmail.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, rcu@vger.kernel.org, Alexander Potapenko , Marco Elver , Dmitry Vyukov , kasan-dev@googlegroups.com, Mateusz Guzik References: <20240807-b4-slab-kfree_rcu-destroy-v2-0-ea79102f428c@suse.cz> <54d62d5a-16e3-4ea9-83c6-8801ee99855e@suse.cz> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spamd-Bar: / X-Rspamd-Action: no action X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 0F36D14003A X-Stat-Signature: yxh9ca6omi4pyidfqtpg7thghpzo1xc9 X-Rspam-User: X-HE-Tag: 1723216483-225742 X-HE-Meta: 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 W0KFLCQf FXcy/5Xk4yLRq94PdkDiM5qaZZQVpc83krtlVVt7EIIZm/iSJBYDXA97XcTnaTQnAiCU/NCwPgivdqvOGnfW6kp/KsMyF0CXmhQuxhCSPTsnhIrEmlxJZlZwjITyUW7WuVA8bIxQew/Oz6+KFCs21wU99Rp4MVk/IhrIYyNc4DQXwwBYgpGw9sNtYrqvrreQl6OLUSeSizTnRq4Il1aq7J+TEg7ImreKsxfJIWh5DUcM3W4NMDDdrz3ksyApN2jnlAvoPhDVHF9lJVJ4K44csFI02YkHLbIkGEF/m1VtJorVlhUGmvwsdi4eqOEPsHQDjytS5irhx0uT4mMkAe+pm1zZxZdN4mHoy7uWoOmMHF36+bJ2wdWWErg1hOJnZhnF3zY2BZNUazX6AviUPazOejV3YTk8N5XHaMpKjCnM28Yv7Lkk1eqhzVRhQqOIgFvymKZ8nSlaHZmBIRsraiev3bgapyw== 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: List-Subscribe: List-Unsubscribe: On 8/9/24 17:12, Jann Horn wrote: > On Fri, Aug 9, 2024 at 5:02 PM Vlastimil Babka wrote: >> On 8/7/24 12:31, Vlastimil Babka wrote: >> > Also in git: >> > https://git.kernel.org/vbabka/l/slab-kfree_rcu-destroy-v2r2 >> >> I've added this to slab/for-next, there will be some conflicts and here's my >> resulting git show or the merge commit I tried over today's next. >> >> It might look a bit different with tomorrow's next as mm will have v7 of the >> conflicting series from Jann: >> >> https://lore.kernel.org/all/1ca6275f-a2fc-4bad-81dc-6257d4f8d750@suse.cz/ >> >> (also I did resolve it in the way I suggested to move Jann's block before >> taking slab_mutex() but unless that happens in mm-unstable it would probably be more >> correct to keep where he did) > > Regarding my conflicting patch: Do you want me to send a v8 of that > one now to move things around in my patch as you suggested? Or should > we do that in the slab tree after the conflict has been resolved in > Linus' tree, or something like that? > I'm not sure which way of doing this would minimize work for maintainers... I guess it would be easiest to send a -fix to Andrew as it's rather minor change. Thanks!