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[2001:b011:20e0:15d4:84b3:8c62:a0b8:199e]) by smtp.gmail.com with ESMTPSA id k11-20020a170902760b00b0015eaa9aee50sm479287pll.202.2022.05.20.21.03.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 May 2022 21:03:09 -0700 (PDT) Date: Sat, 21 May 2022 12:03:01 +0800 From: Chih-En Lin To: Christophe Leroy Cc: Andrew Morton , "linux-mm@kvack.org" , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Christian Brauner , "Matthew Wilcox (Oracle)" , Vlastimil Babka , William Kucharski , John Hubbard , Yunsheng Lin , Arnd Bergmann , Suren Baghdasaryan , Colin Cross , Feng Tang , "Eric W. Biederman" , Mike Rapoport , Geert Uytterhoeven , Anshuman Khandual , "Aneesh Kumar K.V" , Daniel Axtens , Jonathan Marek , Pasha Tatashin , Peter Xu , Andrea Arcangeli , Thomas Gleixner , Andy Lutomirski , Sebastian Andrzej Siewior , Fenghua Yu , David Hildenbrand , "linux-kernel@vger.kernel.org" , Kaiyang Zhao , Huichun Feng , Jim Huang Subject: Re: [RFC PATCH 3/6] mm, pgtable: Add ownership for the PTE table Message-ID: <20220521040301.GA1508050@strix-laptop> References: <20220519183127.3909598-1-shiyn.lin@gmail.com> <20220519183127.3909598-4-shiyn.lin@gmail.com> <0c997fad-ec93-7531-f1c6-29e33f310ebd@csgroup.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0c997fad-ec93-7531-f1c6-29e33f310ebd@csgroup.eu> X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 82C5E4000F X-Rspam-User: Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=a7xYu2hI; spf=pass (imf07.hostedemail.com: domain of shiyn.lin@gmail.com designates 209.85.216.53 as permitted sender) smtp.mailfrom=shiyn.lin@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Stat-Signature: gtg1rmpqznw3ktjosic8oppk64ne1knt X-HE-Tag: 1653105781-263564 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, May 20, 2022 at 02:15:12PM +0000, Christophe Leroy wrote: > > +static inline bool cow_pte_owner_is_same(pmd_t *pmd, pmd_t *owner) > > +{ > > + return (smp_load_acquire(&pmd_page(*pmd)->cow_pte_owner) == owner) ? > > + true : false; Why I wrote like this. ;-) > > The above seems uggly, the following should be equivalent : > > return smp_load_acquire(&pmd_page(*pmd)->cow_pte_owner) == owner; > Thanks.