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Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0 Subject: Re: [PATCH mm-unstable v1 06/20] mm: rework handling in do_wp_page() based on private vs. shared mappings Content-Language: en-US To: David Hildenbrand , linux-kernel@vger.kernel.org Cc: x86@kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, etnaviv@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-perf-users@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kselftest@vger.kernel.org, Linus Torvalds , Andrew Morton , Jason Gunthorpe , John Hubbard , Peter Xu , Greg Kroah-Hartman , Andrea Arcangeli , Hugh Dickins , Nadav Amit , Matthew Wilcox , Mike Kravetz , Muchun Song , Shuah Khan , Lucas Stach , David Airlie , Oded Gabbay , Arnd Bergmann , Christoph Hellwig , Alex Williamson References: <20221116102659.70287-1-david@redhat.com> <20221116102659.70287-7-david@redhat.com> From: Vlastimil Babka In-Reply-To: <20221116102659.70287-7-david@redhat.com> Content-Type: text/plain; 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bh=sH9ni1mWjwD99/t20LozYjCgs14d4WSa0QQZ5/xw57A=; b=XIrlYUJ9YWl+xTLhNArlyDHdtpKYKc5+xNEEni84nj/T05tS+WlvdVOlx+vaJ8DAw369uo LdvrFCZip1V/imyH7sjfl63bHipudcvNRRp+2fmGOX/PYOTSsIjAlFbbC4EDCLZzsI71mE yiCB03dOq/eKTVOJAWPbVAadIg2hBuU= X-Stat-Signature: xh9gzihnamg38wwosxnm4g15gq3rimnq X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: E1A5E1C0006 Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=ONiDsrks; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=uarCxHzX; dmarc=none; spf=pass (imf20.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.28 as permitted sender) smtp.mailfrom=vbabka@suse.cz X-Rspam-User: X-HE-Tag: 1669126825-345326 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 11/16/22 11:26, David Hildenbrand wrote: > We want to extent FAULT_FLAG_UNSHARE support to anything mapped into a > COW mapping (pagecache page, zeropage, PFN, ...), not just anonymous pages. > Let's prepare for that by handling shared mappings first such that we can > handle private mappings last. > > While at it, use folio-based functions instead of page-based functions > where we touch the code either way. > > Signed-off-by: David Hildenbrand Reviewed-by: Vlastimil Babka