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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7c3b80dfde4sm165557685a.36.2025.03.03.07.55.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Mar 2025 07:55:35 -0800 (PST) Date: Mon, 3 Mar 2025 10:55:33 -0500 From: Gregory Price To: Byungchul Park Cc: "Harry (Hyeonggon) Yoo" <42.hyeyoo@gmail.com>, Honggyu Kim , kernel_team@skhynix.com, Matthew Wilcox , lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org, linux-cxl@vger.kernel.org Subject: Re: [LSF/MM/BPF TOPIC] Restricting or migrating unmovable kernel allocations from slow tier Message-ID: References: <20250207072024.GA48419@system.software.com> <20250210071741.GB39454@system.software.com> <20250225050643.GB38036@system.software.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250225050643.GB38036@system.software.com> X-Stat-Signature: qts54898i6kjacxhq15mq1riamu9ak8s X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 3C8822000A X-Rspam-User: X-HE-Tag: 1741017337-874585 X-HE-Meta: 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 L/mx78U+ Y7EozttvL6mSK693LRxyYlpTrMJvefTvbphLSgr4i4gfji5J5sRufpWoMFgONxJNaxBia33HkPhwqODxjfNU0BhY6SVSgQTiD7jzYNiJu/QSNKEAyjVnoaTgDAqRGm4V9MvfOnqa0xb0XzyROk+LcdWt6PNtTTqJeCsXJGlnwI/VMkPzxbCN94SAAQJW28f8JG5RyybaeeSW0KTKYFrHuixn9Y6FnH7Aj4zoPBsUffY/J43tFcRQPtqA95FkGNKcW28MKWvJB2twzca0Gwi//z65Mco82NzX+4nQrdFuxU7RmAIOHJMX16jWIRs+meYtAC0vYqxYh5G6mwc4rSarFVhtAw9Qnh+lbLy4fR3LH6Q0KCJsh4IzNeeLLAN3KEAXBbOauJRxI/HDDRK4= 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 Tue, Feb 25, 2025 at 02:06:43PM +0900, Byungchul Park wrote: > On Mon, Feb 10, 2025 at 10:47:58AM -0500, Gregory Price wrote: > > I also think someone should actively ask whether `struct page` can be > > hosted on remote memory without performance loss. I may look into this. > > Could you share the plan or what you have been thinking about it? > > We'd be happy to discuss this topic together, and furthermore, it'd be > even better to work on it together. > Apologies for the late reply, i've been on some R&R. I haven't written up any specific plan for this, but it is *reasonably* simple to test with memmap_on_memory. ~Gregory