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Thu, 14 Nov 2024 16:21:35 +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 E3OYOo8jNmcTHAAAD6G6ig (envelope-from ); Thu, 14 Nov 2024 16:21:35 +0000 Message-ID: <33a7dfd4-1947-41e2-b0b3-7e4ef6ea3209@suse.cz> Date: Thu, 14 Nov 2024 17:21:35 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 4/5] mm: make vma cache SLAB_TYPESAFE_BY_RCU Content-Language: en-US To: Suren Baghdasaryan , "Liam R. Howlett" , Matthew Wilcox , akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, mhocko@suse.com, hannes@cmpxchg.org, mjguzik@gmail.com, oliver.sang@intel.com, mgorman@techsingularity.net, david@redhat.com, peterx@redhat.com, oleg@redhat.com, dave@stgolabs.net, paulmck@kernel.org, brauner@kernel.org, dhowells@redhat.com, hdanton@sina.com, hughd@google.com, minchan@google.com, jannh@google.com, shakeel.butt@linux.dev, souravpanda@google.com, pasha.tatashin@soleen.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@android.com References: <20241112194635.444146-1-surenb@google.com> <20241112194635.444146-5-surenb@google.com> <54b8d0b9-a1c7-4c1b-a588-2e5308a977fb@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: 7bit X-Rspamd-Action: no action X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 31F7A120025 X-Stat-Signature: z75e8pkfpejwh7syau5e1691axwi9ini X-Rspam-User: X-HE-Tag: 1731601237-184387 X-HE-Meta: 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 l607n0Oh EnF3h5dAQKTVBz4USwYVWoBtToBWoOuwFTIli3dUQAE0Wx3yhwCblj8Ux1Y7NfhoB5uAchP93C+w2CpSvimxf/pnHmvshJjHsyPnYx6V8trgLJrOcvyja1hEm5EpQXrjRi9bZ8p/1vMw9H5PF2S/fQ0wwu0L/ncgjSRvK7235v39W8s+b9+fJjAELj3j3oTsyscw5M47iMH67Dsu+N16skNUn2YT0o9hZ8lFpZFkbuELQ5Y5UcdK+ZGxstBFngobl3SExwYSFrnPPyG4xwagLYzvFTODI5yKM++s2lHsoeYBLIgLlh3ioyPlaPfVun2S03VHZEzuhUoFYFiBSOn8/z2evFR17fPoXEWy5MFcRlXq2ews= 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 11/14/24 17:18, Suren Baghdasaryan wrote: > > Ok, my vma->detached deprecation effort got to the point that my QEMU > boots. The change is not pretty and I'm quite sure I did not cover all > cases yet (like hugepages): > > arch/arm/kernel/process.c | 2 +- > arch/arm64/kernel/vdso.c | 4 +- > arch/loongarch/kernel/vdso.c | 2 +- > arch/powerpc/kernel/vdso.c | 2 +- > arch/powerpc/platforms/pseries/vas.c | 2 +- > arch/riscv/kernel/vdso.c | 4 +- > arch/s390/kernel/vdso.c | 2 +- > arch/s390/mm/gmap.c | 2 +- > arch/x86/entry/vdso/vma.c | 2 +- > arch/x86/kernel/cpu/sgx/encl.c | 2 +- > arch/x86/um/mem_32.c | 2 +- > drivers/android/binder_alloc.c | 2 +- > drivers/gpu/drm/i915/i915_mm.c | 4 +- > drivers/infiniband/core/uverbs_main.c | 4 +- > drivers/misc/sgi-gru/grumain.c | 2 +- > fs/exec.c | 2 +- > fs/hugetlbfs/inode.c | 3 +- > include/linux/mm.h | 111 +++++++++++++++++--------- > include/linux/mm_types.h | 6 -- > kernel/bpf/arena.c | 2 +- > kernel/fork.c | 6 +- > mm/debug_vm_pgtable.c | 2 +- > mm/internal.h | 2 +- > mm/madvise.c | 4 +- > mm/memory.c | 39 ++++----- > mm/mmap.c | 9 +-- > mm/nommu.c | 6 +- > mm/oom_kill.c | 2 +- > mm/vma.c | 62 +++++++------- > mm/vma.h | 2 +- > net/ipv4/tcp.c | 4 +- > 31 files changed, 164 insertions(+), 136 deletions(-) > > Many of the unmap_* and zap_* functions should get an `mm` parameter > to make this work. Ouch, thanks for the attempt! > So, if we take this route, it should definitely be a separate patch, > which will likely cause some instability issues for some time until > all the edge cases are ironed out. I would like to proceed with this > patch series first before attempting to deprecate vma->detached. Let > me know if you have objections to this plan. No objections! >> >> > >> > > >> > > > >> > > > > >> > > > > Either way, we should make it a function so it's easier to reuse for >> > > > > whatever we need in the future, wdyt? >> > > > > >> > > > > To unsubscribe from this group and stop receiving emails from it, send an email to kernel-team+unsubscribe@android.com. >> > > > >