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Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Zach O'Keefe , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Branden Moore Subject: Re: [PATCH 1/2] mm/khugepaged: do synchronous writeback for MADV_COLLAPSE Message-ID: References: <20251110113254.77822-1-shivankg@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251110113254.77822-1-shivankg@amd.com> X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 4EC7518001A X-Stat-Signature: iy3udneoa8egqbsy3jf6s6pjw7eoptqu X-Rspam-User: X-HE-Tag: 1762782446-438149 X-HE-Meta: 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 dlLXugOF z/e1zKuPlFFDCBVMnE0BgJr5SKTxXvlXhvBkXyRE2W1Aek4U1V5wx+uX8EtJ+6x1IQXTpIvYlbas6b6pbPA56NEUKaKkKQ4eiTp0+DpG1z2lo9Qh4AYmF0X3NUWNEjS6d+q3ZjRQ1wgQHkT902kcjZ/EaORgXxNq7xUgOsizzOXKsJMX1Mb1hHDSg7cb3g4HC2Qe7ctsL71QR86QlRsfLXgKuGx12gZjZl+GMKgu9xZrg4eVhQwxkF+b4/yNvcxHjeZnUClSCeYUUZgOIuBFAYUY9yDu9AxmSYsqW4jvJcrA8vBw= 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 Mon, Nov 10, 2025 at 11:32:53AM +0000, Shivank Garg wrote: > When MADV_COLLAPSE is called on file-backed mappings (e.g., executable > text sections), the pages may still be dirty from recent writes. The That explanation derails my brain entirely. Text isn't writable! How can the pages be dirty and file-backed text?