From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C03D3126B2; Thu, 11 Sep 2025 11:19:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757589597; cv=none; b=ftW/DLPlNuNikfHNVj5ljmuTLRUhQRclHXrqCfek0Ib1szuKwN/c3aorjegwnIe4uuib+RxpUCW9PHSS5D7Lpt9/GpMvWSX/pQp19V/KMNL9l1YY1Yzmd4VVLVVQtHQQcueTE7goYsN2uF+s47gdx8aekHi4qPQi6j5pweSkxFQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757589597; c=relaxed/simple; bh=fFjzlO2qMeCZOSWPie7y08l7b+6z2Y+5h60TkzVzcdk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WFoNbfg0kaUR7BQ59KTiwoho2hNaFX2o44P477i8SUTifRqznQJJRnEoyZmCPmV9fw4rK6wpgelgIjd8WC53WbdTRNjNZ6xp+ppjwmzN5C2MeeBXWUPo/0/6gL3G+UUMjLiVpr9zbfmJWTzw0BBS9aEcJCW/PkxZr0CtOHlrTjY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=jEEZLS33; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="jEEZLS33" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=fFjzlO2qMeCZOSWPie7y08l7b+6z2Y+5h60TkzVzcdk=; b=jEEZLS33l4YnaKIiqnVSWD4/0o pzZEG+4cfuyf664Ky3AI5z7HXuyOGUisAuU6+ylSOqtMj9npT9oFGpM2jM4iL5Thzgay+A0F/6qvp zpIV2qOuWF4YxZazzfgbFZRtP+qq6vtvYom6Ai9K3Yz9vx5WTtq8+6t3nID4DbzXFOU3blBPA/L2z ULEnkV8hvp+lehJex9TI5oUVDzE2LbI2LhsL8moODFbisQeG3C5m9RsVinLSlT8n95ghjevH73KZK 2mhnM6KrBpNTKbJy7X7osTJ1brdI31XWqV4Rb6+22cWXbzYxwHIIMWxLuRCfcbA9IrRIeNkJoJxDX Uod0mAJQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1uwfLG-00000002d6O-37O3; Thu, 11 Sep 2025 11:19:54 +0000 Date: Thu, 11 Sep 2025 04:19:54 -0700 From: Christoph Hellwig To: Joanne Koong Cc: Gao Xiang , djwong@kernel.org, hch@infradead.org, brauner@kernel.org, miklos@szeredi.hu, linux-block@vger.kernel.org, gfs2@lists.linux.dev, linux-fsdevel@vger.kernel.org, kernel-team@meta.com, linux-xfs@vger.kernel.org, linux-doc@vger.kernel.org Subject: Re: [PATCH v2 11/16] iomap: add caller-provided callbacks for read and readahead Message-ID: References: <20250908185122.3199171-1-joannelkoong@gmail.com> <20250908185122.3199171-12-joannelkoong@gmail.com> <488d246b-13c7-4e36-9510-8ae2de450647@linux.alibaba.com> Precedence: bulk X-Mailing-List: linux-doc@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: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Wed, Sep 10, 2025 at 01:41:25PM -0400, Joanne Koong wrote: > In my mind, the big question is whether or not the data the > filesystems pass in is logically shared by both iomap_begin/end and > buffered reads/writes/dio callbacks, or whether the data needed by > both are basically separate entities They are separate entities.