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Wed, 10 Sep 2025 14:05:56 +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 gp93McSFwWhCHAAAD6G6ig (envelope-from ); Wed, 10 Sep 2025 14:05:56 +0000 Message-ID: Date: Wed, 10 Sep 2025 16:05:56 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 00/22] Prepare slab for memdescs Content-Language: en-US To: "Matthew Wilcox (Oracle)" , Andrew Morton Cc: Christoph Lameter , David Rientjes , Roman Gushchin , Harry Yoo , linux-mm@kvack.org References: <20250910115507.1991829-1-willy@infradead.org> 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+fMgqZkBQJnyBr8BQka0IFQAAoJECJPp+fMgqZkqmMQ AIbGN95ptUMUvo6aAdhxaOCHXp1DfIBuIOK/zpx8ylY4pOwu3GRe4dQ8u4XS9gaZ96Gj4bC+ jwWcSmn+TjtKW3rH1dRKopvC07tSJIGGVyw7ieV/5cbFffA8NL0ILowzVg8w1ipnz1VTkWDr 2zcfslxJsJ6vhXw5/npcY0ldeC1E8f6UUoa4eyoskd70vO0wOAoGd02ZkJoox3F5ODM0kjHu Y97VLOa3GG66lh+ZEelVZEujHfKceCw9G3PMvEzyLFbXvSOigZQMdKzQ8D/OChwqig8wFBmV QCPS4yDdmZP3oeDHRjJ9jvMUKoYODiNKsl2F+xXwyRM2qoKRqFlhCn4usVd1+wmv9iLV8nPs 2Db1ZIa49fJet3Sk3PN4bV1rAPuWvtbuTBN39Q/6MgkLTYHb84HyFKw14Rqe5YorrBLbF3rl M51Dpf6Egu1yTJDHCTEwePWug4XI11FT8lK0LNnHNpbhTCYRjX73iWOnFraJNcURld1jL1nV r/LRD+/e2gNtSTPK0Qkon6HcOBZnxRoqtazTU6YQRmGlT0v+rukj/cn5sToYibWLn+RoV1CE Qj6tApOiHBkpEsCzHGu+iDQ1WT0Idtdynst738f/uCeCMkdRu4WMZjteQaqvARFwCy3P/jpK uvzMtves5HvZw33ZwOtMCgbpce00DaET4y/UzsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZ8gcVAUJFhTonwAKCRAiT6fnzIKmZLY8D/9uo3Ut9yi2YCuASWxr7QQZ lJCViArjymbxYB5NdOeC50/0gnhK4pgdHlE2MdwF6o34x7TPFGpjNFvycZqccSQPJ/gibwNA zx3q9vJT4Vw+YbiyS53iSBLXMweeVV1Jd9IjAoL+EqB0cbxoFXvnjkvP1foiiF5r73jCd4PR rD+GoX5BZ7AZmFYmuJYBm28STM2NA6LhT0X+2su16f/HtummENKcMwom0hNu3MBNPUOrujtW khQrWcJNAAsy4yMoJ2Lw51T/5X5Hc7jQ9da9fyqu+phqlVtn70qpPvgWy4HRhr25fCAEXZDp xG4RNmTm+pqorHOqhBkI7wA7P/nyPo7ZEc3L+ZkQ37u0nlOyrjbNUniPGxPxv1imVq8IyycG AN5FaFxtiELK22gvudghLJaDiRBhn8/AhXc642/Z/yIpizE2xG4KU4AXzb6C+o7LX/WmmsWP Ly6jamSg6tvrdo4/e87lUedEqCtrp2o1xpn5zongf6cQkaLZKQcBQnPmgHO5OG8+50u88D9I rywqgzTUhHFKKF6/9L/lYtrNcHU8Z6Y4Ju/MLUiNYkmtrGIMnkjKCiRqlRrZE/v5YFHbayRD dJKXobXTtCBYpLJM4ZYRpGZXne/FAtWNe4KbNJJqxMvrTOrnIatPj8NhBVI0RSJRsbilh6TE m6M14QORSWTLRg== In-Reply-To: <20250910115507.1991829-1-willy@infradead.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: B1C2EA0016 X-Stat-Signature: pwnx8737s8e8nyshsuqhz65arof5duyw X-Rspam-User: X-Rspamd-Server: rspam09 X-HE-Tag: 1757513158-259708 X-HE-Meta: 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 ifDFaXnO T2voX4IzyhdOUA6LliI0HxE5dWtG0a2MFHyHtcwrwpPcVmy7V/W1730XenP7zrQ2jiSN4IWU6yVgiEzlhdSGTuLQW23W1OCC9rfVAhh6dHxfCKnoklDsui7LzE+E0fTGz/gOK3bqIma+OrfKRXhfhZWJl5BwZj1Xu+2ZJaQxr9MAm2adRg6sZynbMeUXrMM20XRYlH227V95p/nYS16P3iqPKEuL0REcjn+ZJslszY46JNreFLPTDXiorNR/FlRJbGx7hmDel5NG/6PEldNZRihQYNynjrKfrLr+y 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 9/10/25 13:54, Matthew Wilcox (Oracle) wrote: > When we separate struct folio, struct page and struct slab from each > other, converting to folios then to slabs will be nonsense. It made > sense under the 'folio is just a head page' interpretation, but with > full separation, page_folio() will return NULL for a page which belongs > to a slab. > > This patch series removes almost all mentions of folio from slab. > There are a few folio_test_slab() invocations left around the tree that > I haven't decided how to handle yet. We're not yet quite at the point > of separately allocating struct slab, but that's what I'll be working > on next. > > This has dependencies on both the memdesc_flags_t conversion and the > sheaves work (as well as textual conflicts with nth_page removal and > a few other patches). At this point in the development cycle, I'm not > pushing for this to be included in the next merge window. Thanks, I agree that next cycle will be easier. However seems some cleanups are sufficiently self-contained and small to still be submitted to mm - I think patches 5 and 22 (any more?), which would reduce conflict potential. Meanwhile I'll look at 01-04 to consider adding to slab tree immediately also. > > v2: > - Rebased on next-20250909 > - Picked up review tags (thanks!) > - Fixed the bug in ksize() > > Matthew Wilcox (Oracle) (22): > slab: Remove unnecessary test from alloc_debug_processing() > slab: Remove unnecessary test from alloc_single_from_partial() > slab: Remove dead code in check_slab() > slab: Remove dead code in free_consistency_checks() > mm: Constify compound_order() and page_size() > slab: Reimplement page_slab() > slab: Remove folio references from __ksize() > slab: Remove folio references in memcg_slab_post_charge() > slab: Remove folio references in slab alloc/free > slab: Remove folio references from ___kmalloc_large_node() > slab: Remove folio references from free_large_kmalloc() > slab: Remove folio references from kvfree_rcu_cb() > slab: Remove folio references from kvfree() > slab: Remove folio references from __do_krealloc() > slab: Remove folio references from build_detached_freelist() > slab: Remove dead code from free_large_kmalloc() > slab: Remove folio references from kfree_rcu_sheaf() > usercopy: Remove folio references from check_heap_object() > memcg: Convert mem_cgroup_from_obj_folio() to > mem_cgroup_from_obj_slab() > kasan: Remove references to folio in __kasan_mempool_poison_object() > slab: Remove references to folios from virt_to_slab() > mm: Remove redundant test in validate_page_before_insert() > > include/linux/mm.h | 6 +- > include/linux/page-flags.h | 16 +--- > mm/kasan/common.c | 12 +-- > mm/kfence/core.c | 12 ++- > mm/memcontrol.c | 36 +++----- > mm/memory.c | 3 +- > mm/slab.h | 58 ++++++------- > mm/slab_common.c | 29 ++++--- > mm/slub.c | 163 +++++++++++++++++-------------------- > mm/usercopy.c | 21 +++-- > 10 files changed, 160 insertions(+), 196 deletions(-) >