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[142.162.113.129]) by smtp.gmail.com with ESMTPSA id z19sm10946484qts.96.2021.10.05.12.56.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Oct 2021 12:56:51 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1mXqXi-00BIG6-O4; Tue, 05 Oct 2021 16:56:02 -0300 Date: Tue, 5 Oct 2021 16:56:02 -0300 From: Jason Gunthorpe To: Matthew Wilcox Cc: Johannes Weiner , Linus Torvalds , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Morton Subject: Re: [GIT PULL] Memory folios for v5.15 Message-ID: <20211005195602.GA2688930@ziepe.ca> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 6C1F560037D7 X-Stat-Signature: tcyphgeqx16mm1jhkpicp4a6ftxgscdu Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=ziepe.ca header.s=google header.b=oh+Odu40; dmarc=none; spf=pass (imf10.hostedemail.com: domain of jgg@ziepe.ca designates 209.85.219.50 as permitted sender) smtp.mailfrom=jgg@ziepe.ca X-HE-Tag: 1633463872-380468 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: On Tue, Oct 05, 2021 at 07:30:06PM +0100, Matthew Wilcox wrote: > Outside of core MM developers, I'm not sure that a lot of people > know that a struct page might represent 2^n pages of memory. Even > architecture maintainers seem to be pretty fuzzy on what > flush_dcache_page() does for compound pages: > https://lore.kernel.org/linux-arch/20200818150736.GQ17456@casper.infradead.org/ I definitely second that opinion A final outcome where we still have struct page refering to all kinds of different things feels like a missed opportunity to me. Jason