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Fri, 21 Nov 2025 18:42:50 +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 RUSaJKqyIGmdCwAAD6G6ig (envelope-from ); Fri, 21 Nov 2025 18:42:50 +0000 Message-ID: <68f18daf-cc45-479f-ac6f-0b4dce153ea7@suse.cz> Date: Fri, 21 Nov 2025 19:42:50 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 10/16] mm: replace pmd_to_swp_entry() with softleaf_from_pmd() Content-Language: en-US To: Lorenzo Stoakes , Andrew Morton Cc: Christian Borntraeger , Janosch Frank , Claudio Imbrenda , David Hildenbrand , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Sven Schnelle , Peter Xu , Alexander Viro , Christian Brauner , Jan Kara , Arnd Bergmann , Zi Yan , Baolin Wang , "Liam R . Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Muchun Song , Oscar Salvador , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Axel Rasmussen , Yuanchu Xie , Wei Xu , Kemeng Shi , Kairui Song , Nhat Pham , Baoquan He , Chris Li , SeongJae Park , Matthew Wilcox , Jason Gunthorpe , Leon Romanovsky , Xu Xin , Chengming Zhou , Jann Horn , Miaohe Lin , Naoya Horiguchi , Pedro Falcato , Pasha Tatashin , Rik van Riel , Harry Yoo , Hugh Dickins , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, damon@lists.linux.dev References: <3fb431699639ded8fdc63d2210aa77a38c8891f1.1762812360.git.lorenzo.stoakes@oracle.com> 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: <3fb431699639ded8fdc63d2210aa77a38c8891f1.1762812360.git.lorenzo.stoakes@oracle.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 0186180002 X-Stat-Signature: hfkxrx1udi6kn1my5c3sxb9zzt7haxrn X-HE-Tag: 1763750572-199208 X-HE-Meta: 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 YQJaaKQ2 b3Pnm0ZMmQNS5G2+gT4j/i8bLs5PPmFCGsEN5l1B/3UIXr7cdZhEWsMZarsCaBDaSq1xBOFSqalEEVR8rQ0+Y0sDoDVxNDNkD3nhfDA6eFJ40DcKl7dtJm6l+JTmYofGor1+/jsBaGtoH9z4iWmmasabsBGWghFw1txAu1p2jr7B07xXRnd0MwRpTnY/C/BW0TgpseVkJ5w46TB12RZrhW617CttCoNqPMIho67uWoOLWDIxyvaaqNonR0yunOua3iuH77eUFh8enQujHTzQ79ZEuUpfAL6n8OxvxyOrp5tZkEJk8IQy+yEgbDzSx+B8Mq4A1GwzIaZsG0bHn5GNaiyLXlCazwZmnqu+AceYPfTM3heJvOpRj2DJ8c5vIzpQCoHiCXIyVNvwoIeok4y8qOlBGz/p0ztYe86lZ0ChYUOX+B7BoqhbTw8KXeQzpilmhB19mpI+NJvWSp6kxV+e+AAeYujaYPTMNDPJjwlwkD06xI+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 11/10/25 23:21, Lorenzo Stoakes wrote: > Introduce softleaf_from_pmd() to do the equivalent operation for PMDs that > softleaf_from_pte() fulfils, and cascade changes through code base > accordingly, introducing helpers as necessary. Some of that is adding new pte stuff too, so it could have been separate patch, but it's not a big deal. > We are then able to eliminate pmd_to_swp_entry(), is_pmd_migration_entry(), > is_pmd_device_private_entry() and is_pmd_non_present_folio_entry(). > > This further establishes the use of leaf operations throughout the code > base and further establishes the foundations for eliminating is_swap_pmd(). > > No functional change intended. > > Reviewed-by: SeongJae Park > Signed-off-by: Lorenzo Stoakes Reviewed-by: Vlastimil Babka Assuming the below is fixed. Glad I could demonstrate I'm not just rubber stamping all this ;P (probably missed stuff anyway, as usual) > --- a/mm/page_table_check.c > +++ b/mm/page_table_check.c > @@ -8,7 +8,7 @@ > #include > #include > #include > -#include > +#include > > #undef pr_fmt > #define pr_fmt(fmt) "page_table_check: " fmt > @@ -179,10 +179,10 @@ void __page_table_check_pud_clear(struct mm_struct *mm, pud_t pud) > EXPORT_SYMBOL(__page_table_check_pud_clear); > > /* Whether the swap entry cached writable information */ > -static inline bool swap_cached_writable(swp_entry_t entry) > +static inline bool softleaf_cached_writable(softleaf_t entry) > { > - return is_writable_device_private_entry(entry) || > - is_writable_migration_entry(entry); > + return softleaf_is_device_private(entry) || Shouldn't there be softleaf_is_device_private_write(entry) ? > + softleaf_is_migration_write(entry); > } > > static void page_table_check_pte_flags(pte_t pte) > @@ -190,9 +190,9 @@ static void page_table_check_pte_flags(pte_t pte) > if (pte_present(pte)) { > WARN_ON_ONCE(pte_uffd_wp(pte) && pte_write(pte)); > } else if (pte_swp_uffd_wp(pte)) { > - const swp_entry_t entry = pte_to_swp_entry(pte); > + const softleaf_t entry = softleaf_from_pte(pte); > > - WARN_ON_ONCE(swap_cached_writable(entry)); > + WARN_ON_ONCE(softleaf_cached_writable(entry)); > } > } > > @@ -219,9 +219,9 @@ static inline void page_table_check_pmd_flags(pmd_t pmd) > if (pmd_uffd_wp(pmd)) > WARN_ON_ONCE(pmd_write(pmd)); > } else if (pmd_swp_uffd_wp(pmd)) { > - swp_entry_t entry = pmd_to_swp_entry(pmd); > + const softleaf_t entry = softleaf_from_pmd(pmd); > > - WARN_ON_ONCE(swap_cached_writable(entry)); > + WARN_ON_ONCE(softleaf_cached_writable(entry)); > } > } >