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Fri, 24 Apr 2026 02:43:16 -0700 (PDT) From: Ritesh Harjani (IBM) To: Amir Goldstein , Matthew Wilcox Cc: Christian Brauner , lsf-pc@lists.linux-foundation.org, Jan Kara , Ojaswin Mujoo , Pankaj Raghav , Andres Freund , djwong@kernel.org, john.g.garry@oracle.com, hch@lst.de, Luis Chamberlain , dchinner@redhat.com, Javier Gonzalez , gost.dev@samsung.com, tytso@mit.edu, p.raghav@samsung.com, vi.shah@samsung.com, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Vlastimil Babka (SUSE)" Subject: Re: [LSF/MM/BPF TOPIC] Buffered atomic writes In-Reply-To: Date: Fri, 24 Apr 2026 15:10:58 +0530 Message-ID: References: MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 43C3B180006 X-Rspamd-Server: rspam07 X-Stat-Signature: 997asm6xeymmresouhyt7q79h51j48fk X-Rspam-User: X-HE-Tag: 1777023798-84457 X-HE-Meta: U2FsdGVkX19Kv7VtmRt1VlnmtQRBxCv0qdpijw9D+rlznLeAjtjTEjL3qPShQbTgQI0Ro+DnGCHERXVg7UV3k4g9UcpDtc6XT+Wt9osMLacz6gf3d1rxwiubAFBN7ErM0+kXWAMz+QUziicAl/389ROYgGev3cwRRI5+HKqx8Yf1yFehL7h/ojhSnK2G060hWPynDmqk7P50iog1vmjjNqGCn/Tafc5U1kH0cXIgra9rHxkzVWul9j6TZsu7wBVqSAO9XvVLiWl0q1uI95QG1Gz3nj1tq6B9EK+Hmq5O9nHr0HDmDgOksYnd1w+Rf0g1lcu3GWo7C5X9C/YKoxD8VQT1zOqqRDrNRGnhuU/xP9c7vtiGasHa0dN0ENy+qK7z+ZthyDNQ+msolHt5MkqUfsUVppo2vO0eD00KZKTSC2HN5cgdTiGKEZSGTsWR+w+ZhfNlzYmmiwzWR7OH1NeJiXqtl6gaf5rrvcOEgnlsBPJzjZzrl+t/WReWorixUZZtLle6cQxro1PjUld6Nw/+Y/DFkOeIqLXhaldYI7jxH6B5yEfHaJ7yv0N+zb039PrKcrA+7OdAraUcA8At4dzguJrf5ANNvZ3E78fVyaM0FKiF28+1NvQynZTo29cOuv+/ScQl9MMIyFFlr9jSn9Nv1D5BFD7l/jBNVM+qTVS0MzunFjgFF8eGIHbx6nap/7zt0pCkBvLBj15Bx+Zr1zsmoQgwiG2SfAV8ob5TWaFmWuBvKERszWvgrOql5XT4KdzBaNvTKATzI2fa6yjxHbPyncDL8gqD50J/quPzCLhRQdbhHfXPPf8a6vy7U3+oLkJzRrBOpD1WQiRC784zL/CgA9CKJFWTegaGa+DOQ/1owNbXMZloTt58mgbBKm2G1yoXWus6kIcpCwVT4YuF/pvsBbmS+fx1xHkCshXU3P20ceJU0X1YBRoqKWtOq5QkguXvyHO34nHqft4IiMySavZ tp1caH6k 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Amir Goldstein writes: > On Fri, Apr 24, 2026 at 7:07 AM Ritesh Harjani wrote: >> >> Matthew Wilcox writes: >> >> > On Fri, Apr 24, 2026 at 06:32:03AM +0530, Ritesh Harjani wrote: >> >> We were thinking if it is possible to extend the Buffered Atomic Write >> >> session into two "continuous" halves of 30mins each (total of 60mins)? >> > >> > This is painful because you've requested me, plus both Storage and FS. >> > FS has lots of space, but I don't, and Storage is also pretty full. >> >> I see, sorry about making your (and PC) life difficult here. I know it's >> a lot of planning :( >> >> I think, both FS+IO folks will be interested to discuss both of these >> topics. Do you think breaking this into two discontiguous session help >> us plan better maybe? In case if we don't have any continuous slot, then >> maybe we can split those into two. >> > > I scheduled the two sessions as you requested 9:30-10:30 > for FS+IO and moved Parallel Writeback to Wednesday > across the MM CXL session. > Thanks Amir. Yes, I think this will be very helpful. >> > >> > Do you need me for the full hour or just half of it? >> >> Although I understand buffered writethrough is an FS related area, but I >> am sure a new writethrough I/O path is an overlap for you in page cache >> as well :) So, yes, it will be good to have your feedback on the second >> part of this discussion which is - buffered write-through for buffered >> atomic writes. >> > > Matthew, > > I don't know why Parallel Writeback was scheduled as an MM session, > but if you think it should include MM, could you move the CXL session > to the now free MM slot on Monday 9:30, so that we can extend > Parallel Writeback into MM? > > This will allow you to participate in the atomic buffered write sessions. > Thanks again! -ritesh