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[172.10.233.147]) by smtp.gmail.com with ESMTPSA id x22-20020a05622a001600b003a57f822157sm1765388qtw.90.2022.11.18.01.08.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Nov 2022 01:08:28 -0800 (PST) Date: Fri, 18 Nov 2022 01:08:13 -0800 (PST) From: Hugh Dickins X-X-Sender: hugh@ripple.attlocal.net To: Andrew Morton cc: Linus Torvalds , Johannes Weiner , "Kirill A. Shutemov" , Matthew Wilcox , David Hildenbrand , Vlastimil Babka , Peter Xu , Yang Shi , John Hubbard , Mike Kravetz , Sidhartha Kumar , Muchun Song , Miaohe Lin , Naoya Horiguchi , Mina Almasry , James Houghton , Zach O'Keefe , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 0/3] mm,thp,rmap: rework the use of subpages_mapcount In-Reply-To: <5f52de70-975-e94f-f141-543765736181@google.com> Message-ID: References: <5f52de70-975-e94f-f141-543765736181@google.com> MIME-Version: 1.0 X-Spam-Status: No, score=-17.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, USER_IN_DEF_DKIM_WL,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749824703326071670?= X-GMAIL-MSGID: =?utf-8?q?1749824703326071670?= Linus was underwhelmed by the earlier compound mapcounts series: this series builds on top of it (as in next-20221117) to follow up on his suggestions - except rmap.c still using lock_page_memcg(), since I hesitate to steal the pleasure of deletion from Johannes. 1/3 mm,thp,rmap: subpages_mapcount of PTE-mapped subpages 2/3 mm,thp,rmap: subpages_mapcount COMPOUND_MAPPED if PMD-mapped 3/3 mm,thp,rmap: clean up the end of __split_huge_pmd_locked() Documentation/mm/transhuge.rst | 10 +- include/linux/mm.h | 65 +++++++---- include/linux/rmap.h | 12 +- mm/debug.c | 2 +- mm/huge_memory.c | 15 +-- mm/rmap.c | 213 ++++++++++------------------------- 6 files changed, 119 insertions(+), 198 deletions(-) Hugh