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[108.18.109.80]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-50e3bf260fbsm9752291cf.10.2026.04.17.06.30.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Apr 2026 06:30:28 -0700 (PDT) Date: Fri, 17 Apr 2026 09:30:25 -0400 From: Gregory Price To: Christoph Hellwig Cc: "Darrick J. Wong" , Dan Williams , Joanne Koong , John Groves , Miklos Szeredi , Bernd Schubert , John Groves , Dan J Williams , Bernd Schubert , Alison Schofield , John Groves , Jonathan Corbet , Shuah Khan , Vishal Verma , Dave Jiang , Matthew Wilcox , Jan Kara , Alexander Viro , David Hildenbrand , Christian Brauner , Randy Dunlap , Jeff Layton , Amir Goldstein , Jonathan Cameron , Stefan Hajnoczi , Josef Bacik , Bagas Sanjaya , Chen Linxuan , James Morse , Fuad Tabba , Sean Christopherson , Shivank Garg , Ackerley Tng , Aravind Ramesh , Ajay Joshi , "venkataravis@micron.com" , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "nvdimm@lists.linux.dev" , "linux-cxl@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" Subject: Re: [PATCH V10 00/10] famfs: port into fuse Message-ID: References: <20260414185740.GA604658@frogsfrogsfrogs> <43d36427-4629-4712-a262-391e64006eb5@app.fastmail.com> <20260416224331.GD114184@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Fri, Apr 17, 2026 at 01:13:36AM -0700, Christoph Hellwig wrote: > On Thu, Apr 16, 2026 at 03:43:31PM -0700, Darrick J. Wong wrote: > > > ...however the strongest case (IMO) would be if (having merged famfs) we > > then merge fuse-iomap after famfs. Then we extend the existing > > fuse-iomap-bpf prototype to allow per-mount and per-inode iomap bpf ops. > > That enables us to analyze thoroughly the performance characteristics of: > > Don't go there. I think that you two are comining up with two > interfaces for roughly the same thing is a pretty clear indicator > that this needs to be fully hashed out as a single interface first, > and any kind of preliminary merging is just going to create problems. > We're not sure how deep this rathole goes, and John's work has been in the rathole for a few years now. Hence the desire to hedge. But it's obvious no decisions will be made before LSFMM - so we can take a breath and chew on it. Maybe we'll get there in person. ~Gregory