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[142.162.115.133]) by smtp.gmail.com with ESMTPSA id c49sm603116qta.89.2021.01.15.11.53.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Jan 2021 11:53:02 -0800 (PST) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1l0V9Z-0022NF-Ib; Fri, 15 Jan 2021 15:53:01 -0400 Date: Fri, 15 Jan 2021 15:53:01 -0400 From: Jason Gunthorpe To: David Hildenbrand Cc: Andrea Arcangeli , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Yu Zhao , Andy Lutomirski , Peter Xu , Pavel Emelyanov , Mike Kravetz , Mike Rapoport , Minchan Kim , Will Deacon , Peter Zijlstra , Linus Torvalds , Hugh Dickins , "Kirill A. Shutemov" , Matthew Wilcox , Oleg Nesterov , Jann Horn , Kees Cook , John Hubbard , Leon Romanovsky , Jan Kara , Kirill Tkhai , Nadav Amit , Jens Axboe Subject: Re: [PATCH 0/1] mm: restore full accuracy in COW page reuse Message-ID: <20210115195301.GI4605@ziepe.ca> References: <20210110004435.26382-1-aarcange@redhat.com> <20210115183721.GG4605@ziepe.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 Fri, Jan 15, 2021 at 08:46:48PM +0100, David Hildenbrand wrote: > Just wild ideas. Most probably that has already been discussed, and most > probably people figured that it's impossible :) No, I think it is all fair topics. There is no API reason for any of this to be limited, but in practice, I doubt there is more than small 10's Huge pages complicate things of course Jason