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AJvYcCXEKULM7P5DP0hLTxZapLXLtuzbtYOHzjdy8I7o9pzHMBLAfs9bkOGqhAh0aQvG+MVpuSVmiqyKcg==@kvack.org X-Gm-Message-State: AOJu0YynZJI03P9/o6IYtVk05IjdOtXTB5TTRHUNbTnd2KMOTuPixtid G/5CRw0jbcWQUbx+GTyWXJ9HANoIXz4ZnlFXOFzRwcpatrGLYrlADKQpMnOo+eV2z9rlApDzTil L93rq1R9XdLStMDFnT/A0GA== X-Google-Smtp-Source: AGHT+IE2emob7ne9xgmmOZ/2Nz4UUhKEr9sTG+LQ/jCh4mtM1mNcZXbWVXEVF+2dcFUaFpOL2yid3wyO7OHIppEddw== X-Received: from pjbee7.prod.google.com ([2002:a17:90a:fc47:b0:2fa:1fac:269c]) (user=ackerleytng job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:55d0:b0:309:fac6:44f9 with SMTP id 98e67ed59e1d1-30e51947471mr583415a91.31.1747266215905; Wed, 14 May 2025 16:43:35 -0700 (PDT) Date: Wed, 14 May 2025 16:42:04 -0700 In-Reply-To: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.49.0.1045.g170613ef41-goog Message-ID: Subject: [RFC PATCH v2 25/51] mm: truncate: Expose preparation steps for truncate_inode_pages_final From: Ackerley Tng To: kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-fsdevel@vger.kernel.org Cc: ackerleytng@google.com, aik@amd.com, ajones@ventanamicro.com, akpm@linux-foundation.org, amoorthy@google.com, anthony.yznaga@oracle.com, anup@brainfault.org, aou@eecs.berkeley.edu, bfoster@redhat.com, binbin.wu@linux.intel.com, brauner@kernel.org, catalin.marinas@arm.com, chao.p.peng@intel.com, chenhuacai@kernel.org, dave.hansen@intel.com, david@redhat.com, dmatlack@google.com, dwmw@amazon.co.uk, erdemaktas@google.com, fan.du@intel.com, fvdl@google.com, graf@amazon.com, haibo1.xu@intel.com, hch@infradead.org, hughd@google.com, ira.weiny@intel.com, isaku.yamahata@intel.com, jack@suse.cz, james.morse@arm.com, jarkko@kernel.org, jgg@ziepe.ca, jgowans@amazon.com, jhubbard@nvidia.com, jroedel@suse.de, jthoughton@google.com, jun.miao@intel.com, kai.huang@intel.com, keirf@google.com, kent.overstreet@linux.dev, kirill.shutemov@intel.com, liam.merwick@oracle.com, maciej.wieczor-retman@intel.com, mail@maciej.szmigiero.name, maz@kernel.org, mic@digikod.net, michael.roth@amd.com, mpe@ellerman.id.au, muchun.song@linux.dev, nikunj@amd.com, nsaenz@amazon.es, oliver.upton@linux.dev, palmer@dabbelt.com, pankaj.gupta@amd.com, paul.walmsley@sifive.com, pbonzini@redhat.com, pdurrant@amazon.co.uk, peterx@redhat.com, pgonda@google.com, pvorel@suse.cz, qperret@google.com, quic_cvanscha@quicinc.com, quic_eberman@quicinc.com, quic_mnalajal@quicinc.com, quic_pderrin@quicinc.com, quic_pheragu@quicinc.com, quic_svaddagi@quicinc.com, quic_tsoni@quicinc.com, richard.weiyang@gmail.com, rick.p.edgecombe@intel.com, rientjes@google.com, roypat@amazon.co.uk, rppt@kernel.org, seanjc@google.com, shuah@kernel.org, steven.price@arm.com, steven.sistare@oracle.com, suzuki.poulose@arm.com, tabba@google.com, thomas.lendacky@amd.com, usama.arif@bytedance.com, vannapurve@google.com, vbabka@suse.cz, viro@zeniv.linux.org.uk, vkuznets@redhat.com, wei.w.wang@intel.com, will@kernel.org, willy@infradead.org, xiaoyao.li@intel.com, yan.y.zhao@intel.com, yilun.xu@intel.com, yuzenghui@huawei.com, zhiquan1.li@intel.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: jzmagwn9uq3hcjcgf9gx76hkf8kom1u5 X-Rspamd-Queue-Id: 0FA8510000B X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1747266216-639946 X-HE-Meta: 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 EN/zEi8v 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 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: This will allow preparation steps to be shared while implementing truncation differently. Signed-off-by: Ackerley Tng Change-Id: I83ad5965b8b50283ad930c20c99e3165cb5626c9 --- include/linux/mm.h | 1 + mm/truncate.c | 26 ++++++++++++++++---------- 2 files changed, 17 insertions(+), 10 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index bf55206935c4..e4e73c231ced 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3514,6 +3514,7 @@ extern unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info); extern void truncate_inode_pages(struct address_space *, loff_t); extern void truncate_inode_pages_range(struct address_space *, loff_t lstart, loff_t lend); +extern void truncate_inode_pages_final_prepare(struct address_space *mapping); extern void truncate_inode_pages_final(struct address_space *); /* generic vm_area_ops exported for stackable file systems */ diff --git a/mm/truncate.c b/mm/truncate.c index 5d98054094d1..057e4aa73aa9 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -457,16 +457,7 @@ void truncate_inode_pages(struct address_space *mapping, loff_t lstart) } EXPORT_SYMBOL(truncate_inode_pages); -/** - * truncate_inode_pages_final - truncate *all* pages before inode dies - * @mapping: mapping to truncate - * - * Called under (and serialized by) inode->i_rwsem. - * - * Filesystems have to use this in the .evict_inode path to inform the - * VM that this is the final truncate and the inode is going away. - */ -void truncate_inode_pages_final(struct address_space *mapping) +void truncate_inode_pages_final_prepare(struct address_space *mapping) { /* * Page reclaim can not participate in regular inode lifetime @@ -487,6 +478,21 @@ void truncate_inode_pages_final(struct address_space *mapping) xa_lock_irq(&mapping->i_pages); xa_unlock_irq(&mapping->i_pages); } +} +EXPORT_SYMBOL(truncate_inode_pages_final_prepare); + +/** + * truncate_inode_pages_final - truncate *all* pages before inode dies + * @mapping: mapping to truncate + * + * Called under (and serialized by) inode->i_rwsem. + * + * Filesystems have to use this in the .evict_inode path to inform the + * VM that this is the final truncate and the inode is going away. + */ +void truncate_inode_pages_final(struct address_space *mapping) +{ + truncate_inode_pages_final_prepare(mapping); truncate_inode_pages(mapping, 0); } -- 2.49.0.1045.g170613ef41-goog