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b=XU/IlB9SH9nlFWYU/EiIad/OZNWTJfz8uzGq441tNsdlZHlxAhPQwtA2NOjDRpp9S jsCQvoPHpW/b2EqxF4z9HctvBw2zcUUMvy0PL79CW7tF6sSr9KaxQilTtBvSpuNzqm LQb87xxVBr99WUX4SXHuRN9DK8q+KFJ//Sw7qV26y3Fn9lfiqnc2QNNAuAppqwkISa IzKvOiT+uSEDGkJ0H1/ydXDs9FselwOycC80O8y436kSj8vTfb/9oUcRB5YSJcxjNT MqyLv9+oWkNXUQUAOs44eSNwTfA+PX8Cm5Fx7teBgjoWyybo8QhspPJkMRersifqVP doyNr89pmQCpQ== Date: Fri, 22 May 2026 03:32:39 +0000 From: Jaegeuk Kim To: Theodore Tso Cc: Christoph Hellwig , linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, Matthew Wilcox , linux-f2fs-devel@lists.sourceforge.net, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Akilesh Kailash , Christian Brauner Subject: Re: [f2fs-dev] [PATCH v2] f2fs: another way to set large folio by remembering inode number Message-ID: References: <20260409134538.3692605-1-jaegeuk@kernel.org> <20260521155748.GA79343@macsyma-wired.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260521155748.GA79343@macsyma-wired.lan> X-Stat-Signature: yetbfttfnsnhp7h7mjuqmquw9rqwa9f5 X-Rspamd-Queue-Id: 9B5DA1C0005 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1779420762-39482 X-HE-Meta: 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 FwS/iGfw 1P2xWBdU7poIgn3sCjl25Cy7OQNJManr8AQavjX+YAfov7yXtgIwTr8XtK1HXvhqDFtvBOElSIaBOx2QyoxSwNKRJnP58N1Ztj7MIjOwl6fvbC9x3NJIDfNo6vyLQCuWgopaOpIJ7leu8/0xPcnWwHtZtY9Fmb9CEcV00KdctStZYdQtSHcu9ZmpRrnvupj8l/By6imygQXGPx2qU1Oyz+j5HCLK98r7enaRWMFPC7+3J3JrlY6UkziyOi4kDwXRnBZ4qmudk6DUJb3qpsM+Ux4fK+MZyKNDQ7XOykXNSOHttJMgEXSvgSji5Vl1Ze/CzTXTSvIJ6irga4Nc= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 05/21, Theodore Tso wrote: > On Thu, May 21, 2026 at 01:51:08AM -0700, Christoph Hellwig wrote: > > > You haven't sent a proposal. This is a reply to a reply to a reply of a > > > patch. There's no justification for why f2fs is so special that it > > > needs this. What the hell is going on? You know this is not the way to > > > get code merged into Linux. > > > > None of this got properly answers, and this broken interface now landed > > in linux-next. IT is offloading a user.* xattr which is free-form > > user data with semantics that are weird to say it very nicely. > > > > All this was done against the advice in the mailing list discussion. > > So let me get this straight. This is a magic xattr interface which is > not even persisted in the file system, but instead sets a 32-bit > bitmask in the struct inode which disappears once the inode gets > flushed from the inode stack. And it uses a generic xattr name, > "user.fadvise". > > There's no way in *hell* any other file system is likely to adopt such > a broken interface, so why didn't you just use an ioctl to set this > magic f2fs-specific flag? I went this route because Android heavily restricts ioctl() permissions and we needed broader access for this to work within the framework. It’s definitely a pragmatic choice just to get it running in production. If ioctl() is a right way for upstream, I'm happy to change this patch. By the way, I really don't understand why all the messages are so offensive, even without trying to understand the problem or guiding right directions. > > > I think at some point we just need to stop taking f2fs updates likes > > this. > > Well, that's ultiamtely up to Linus. I'll say that if I were Linus > (and I'm glad I'm not :-), and I saw this in a pull request, I'd > reject it out of hand. But whether it's worth making a huge fuss and > asking escalating this mess to Linus, we probably should get a bit > more community consensus before taking such a drastic step. Could I also raise a quick concern regarding the phrasing/wording used in the communications? > > Christian, since you're one of the VFS maintaienrs, what's your > opinion about escalating this to Linus? > > - Ted > > > _______________________________________________ > Linux-f2fs-devel mailing list > Linux-f2fs-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 99668CD4F5B for ; Fri, 22 May 2026 03:32:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.sourceforge.net; s=beta; h=Content-Transfer-Encoding:Content-Type:Cc: Reply-To:From:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Subject:In-Reply-To:MIME-Version:References: Message-ID:To:Date:Sender:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; 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Fri, 22 May 2026 03:32:48 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 94E2140851; Fri, 22 May 2026 03:32:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 240291F000E9; Fri, 22 May 2026 03:32:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779420761; bh=CGFAvI18BKBe3vm3c5WorkCHjUcjWwmCPrmYoSAlc2s=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=XU/IlB9SH9nlFWYU/EiIad/OZNWTJfz8uzGq441tNsdlZHlxAhPQwtA2NOjDRpp9S jsCQvoPHpW/b2EqxF4z9HctvBw2zcUUMvy0PL79CW7tF6sSr9KaxQilTtBvSpuNzqm LQb87xxVBr99WUX4SXHuRN9DK8q+KFJ//Sw7qV26y3Fn9lfiqnc2QNNAuAppqwkISa IzKvOiT+uSEDGkJ0H1/ydXDs9FselwOycC80O8y436kSj8vTfb/9oUcRB5YSJcxjNT MqyLv9+oWkNXUQUAOs44eSNwTfA+PX8Cm5Fx7teBgjoWyybo8QhspPJkMRersifqVP doyNr89pmQCpQ== Date: Fri, 22 May 2026 03:32:39 +0000 To: Theodore Tso Message-ID: References: <20260409134538.3692605-1-jaegeuk@kernel.org> <20260521155748.GA79343@macsyma-wired.lan> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260521155748.GA79343@macsyma-wired.lan> X-Headers-End: 1wQGcw-0003OY-Fv Subject: Re: [f2fs-dev] [PATCH v2] f2fs: another way to set large folio by remembering inode number X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Jaegeuk Kim via Linux-f2fs-devel Reply-To: Jaegeuk Kim Cc: linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, Matthew Wilcox , linux-f2fs-devel@lists.sourceforge.net, Christoph Hellwig , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Akilesh Kailash , Christian Brauner Content-Type: text/plain; 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