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[209.85.218.45]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5e4c3b4aadbsm1852053a12.6.2025.02.27.18.51.24 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 Feb 2025 18:51:24 -0800 (PST) Received: by mail-ej1-f45.google.com with SMTP id a640c23a62f3a-aaf0f1adef8so302234066b.3 for ; Thu, 27 Feb 2025 18:51:24 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCUw/ffqvUCuOLvT/c2Shir9QXLeRf10SN3RqmZamtvtH7Om5H2iVIFghheeyJYnL5KTMTUHOyCVXA==@kvack.org X-Received: by 2002:a17:907:3d8f:b0:ab3:60eb:f8b6 with SMTP id a640c23a62f3a-abf2683a0f2mr155461066b.56.1740711083759; Thu, 27 Feb 2025 18:51:23 -0800 (PST) MIME-Version: 1.0 References: <20250228023043.83726-1-mathieu.desnoyers@efficios.com> In-Reply-To: <20250228023043.83726-1-mathieu.desnoyers@efficios.com> From: Linus Torvalds Date: Thu, 27 Feb 2025 18:51:07 -0800 X-Gmail-Original-Message-ID: X-Gm-Features: AQ5f1JqTdqZ-fG1lJ2CuOAnAVjO2mW1kqg7gj11q4lOaIUp8etsT12dAIwUXjXE Message-ID: Subject: Re: [RFC PATCH 0/2] SKSM: Synchronous Kernel Samepage Merging To: Mathieu Desnoyers Cc: Andrew Morton , linux-kernel@vger.kernel.org, Matthew Wilcox , Olivier Dion , linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: p7cdosh1x1m9mczjyxrws6xko4bqjan5 X-Rspamd-Queue-Id: 2C493A0005 X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1740711087-392439 X-HE-Meta: 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 Gn8x8zbk 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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: On Thu, 27 Feb 2025 at 18:31, Mathieu Desnoyers wrote: > > This series introduces SKSM, a new page deduplication ABI, > aiming to fix the limitations inherent to the KSM ABI. So I'm not interested in seeing *another* KSM version. Because I absolutely do *NOT* want a new chapter in the saga of SLUB vs SLAB vs SLOB. However, if the feeling is that this can *replace* the current horror that is KSM, I'm a lot more interested. I suspect our current KSM model has largely been a failure, and this might be "good enough". Linus