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Petersen" , Matthew Wilcox , Dave Chinner , linux-kernel@vger.kernel.org Subject: Re: [LSF/MM/BPF TOPIC] untorn buffered writes Message-ID: References: <20240228061257.GA106651@mit.edu> <9e230104-4fb8-44f1-ae5a-a940f69b8d45@oracle.com> <4c68c88d-496c-4294-95a8-d2384d380fd3@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4c68c88d-496c-4294-95a8-d2384d380fd3@oracle.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Rspamd-Queue-Id: AFF37A000C X-Rspam-User: X-Rspamd-Server: rspam12 X-Stat-Signature: 6o8erx7yncufghk6bjbf3bausu6h1jo9 X-HE-Tag: 1716893864-288187 X-HE-Meta: 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 4v6Qul69 KYHLmRCh4mIYFgcm5ODd3KZqr+8AhwOkfjnR1Jwgjw0MfmDIWb4nI/RGqd3beSmJ/QnKfgVq1opLCRv5Hk2THey9ZEaMFou3/nz5MK427q7YmfMStJdaSFWS8Ybyt1wCnq4C1i1ETLK1e0+agQkN8PRxkEUlcT2xOrl/oOqGEB1+1IncRrXFEABdq+BOD4attjS4k4zpJYB/O6l3esIiQyc5hoF5fV6wZmZVSpLdPufx9jJjFVKofh2kUqo/yWnvbyvvklgsofT+T/iLmUow5xPEjNdodxz8ccW7/nQsZ8UV4ihDJ3Xr5CwEiiK4TYqZ8D8EDtVSraE9SLYHhOYEcOWNa4dFfzD33HtpDSWvbNghUO1KCJzmCG5DymlJGKl+4hxDhQRDpx8iJk5c= 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, May 28, 2024 at 10:21:15AM +0100, John Garry wrote: > If so, I am not sure if a mmap interface would work for DB usecase, like > PostgreSQL. I can ask. Databases really should be using direct I/O for various reasons. And if Postgres still isn't doing that we shouldn't work around that in the kernel.