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h=Date:From:To:Cc:Subject:References:In-Reply-To; b=V/vrYRp0MYR3H+LKzmfFDqD/fLBwB3C5OIC2C/3QFYR4pkt151g8I4L2ubXnpDYzS jqlDUYgty+BebpKbd4uwaqVdMtN9XeNXHlSCxyXz25/V7fXSiLINzTr1SJMFIq/m+2 n4ih3ckd26s9najTUSTzlx/TnyU32tGdT4NYbCCjQQuiXY6t41uv8EhdpjhfhJkajE mnagPWy5P9KhWGo+9MlY5XxlImzi7tzMZZAywGnl2f1y5W0pYnUVHQjcvOi97Fz4xf Ni6oMAQEiM+IW+mxOHWIjJyPkeS4IEFZiD8RWGIpuc53LL9E2NHKt7zOkpH8JNLwUq MyqqO6i2sNlLw== Date: Wed, 4 Nov 2026 11:02:37 +0100 From: "Oscar Salvador (SUSE)" To: Muchun Song Cc: Oscar Salvador , Andrew Morton , Mike Rapoport , Qi Zheng , Lance Yang , James Houghton , David Hildenbrand , Muchun Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 05/12] mm: hugetlb_vmemmap: unify writable vmemmap page preparation Message-ID: References: <20261104023510.260766-1-songmuchun@bytedance.com> <20261104023510.260766-6-songmuchun@bytedance.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261104023510.260766-6-songmuchun@bytedance.com> X-Stat-Signature: 5jy6qhsfrssyas49nx3wsjt1u94jycq8 X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 15BD1180006 X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1793786563-583229 X-HE-Meta: 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 ZcOpA51t YwHrExvHwwY2mgdLrBzex9Yksk8/2J1uar6b1/7oCGk0Vk3EtwAKYqi39f2APu2nmyrsDJAK6u9NArVbxx3uGVqycK6QitU5LLr/OGWQUjYXutNTmb3rOF+cUvpgL64Buno146pW7fd5Bev5x5Gwy+QSG1wFCV9SToQOGBt2tvATL56p22SE09WcacIJt7Xr+XrtTxj9yYthz5nuuuZVys5NqKNZ8EVe8WQK7t2ePLPme5VR5f21KSv8q1HMTdEaIS9ZXrC2PeW7+P8MUIuPtQEn6nmz/iBQhrrAELLtW7rwoJcU/uUv31/fvQQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Wed, Nov 04, 2026 at 10:35:03AM +0800, Muchun Song wrote: > Installing a writable vmemmap page requires consuming a replacement page, > copying the current contents into it and making the copy visible before > publishing the new mapping. HVO currently splits this sequence between > the page-table walker and its caller depending on the remap path. > > Centralize the sequence in the walker so all writable replacements follow > the same copy-and-publish protocol. This keeps page preparation with the > mapping update and removes path-specific handling from higher-level HVO > code. > > No functional change intended. > > Signed-off-by: Muchun Song > Reviewed-by: Lance Yang > Reviewed-by: Qi Zheng > Reviewed-by: Mike Rapoport (Microsoft) Reviewed-by: Oscar Salvador -- Oscar Salvador SUSE Labs