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 28EC72FF160; Wed, 3 Sep 2025 13:34:44 +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=1756906485; cv=none; b=p1N0XsIm2z/x33LI/8VaXdZFwShgG3rH31A7MnPQ/1LvwLZqz5ZcKGQ8gjDeUVkVHTf6BohSDhfq5iW9dXJpw4uAGy41mSJY5uZoujKqGkij83VEMBxwLpfyuRgl53bEpUuMjxiLH591z71RwEMy+1VUmzYn4QKiIHyaNikkftQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756906485; c=relaxed/simple; bh=7F6XOAzUhsDHmCI3/SCs3uVB95vrfC3f7t3UxCYkuGA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=oS+KCGYYDR9S47JUQ9hcgNXc7rB8AVm+EyZ0AxQZl0Nt4FMtagy4Krmp5YGWuHQGRLsh+gylKOmJuiQ0gNHUVc5Y953ccTl8Ul+1QHShvyt4p0nnxxEe2Yy0jmS/RRXnUSJKKL2Iv1FxU/HW/Vky2gfw5W5h50kV7nNLkuwjGQM= 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=aCoM+M/i; 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="aCoM+M/i" 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=c/WRtC4WLl4+ChMSM11wBey1MNP5VSLO7LDcCYVKt0w=; b=aCoM+M/ixXSp6SCJUeLc1q1KwC qnHd1CCJ4h+LcjUib+boUGHt5vi1QaXfY5NOTB3uRTJt20/lJVHeCIG6S7nSWOXHhdwE1PlSchAk0 ZQnyygZQntkUqXk8QlDKeafE2whZgfpza9IeLt5hKoP8z21tEGG0cilsHjqAyeCkjYsYLtJXjNIqp MI/6Xq86k0nvXXVCzNQYOUyL74MpGOmWyVrzAhBh6qer1nKKpvMps3qw1aUoP+G6IsYLzR7cq/xl3 iQV9Usd4YSieGqh5+tkFI7L5U7B8WtoHQuMJIz4qgtL5G8swZxeJqHQdesjQwXIUW4Z432UltvVhj GDYHLaHw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1utndJ-00000006c6S-16b2; Wed, 03 Sep 2025 13:34:41 +0000 Date: Wed, 3 Sep 2025 06:34:41 -0700 From: Christoph Hellwig To: Yu Kuai Cc: hch@infradead.org, colyli@kernel.org, hare@suse.de, dlemoal@kernel.org, tieren@fnnas.com, axboe@kernel.dk, tj@kernel.org, josef@toxicpanda.com, song@kernel.org, kmo@daterainc.com, satyat@google.com, ebiggers@google.com, neil@brown.name, akpm@linux-foundation.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-raid@vger.kernel.org, yukuai3@huawei.com, yi.zhang@huawei.com, yangerkun@huawei.com, johnny.chenyi@huawei.com Subject: Re: [PATCH RFC v3 14/15] block: fix disordered IO in the case recursive split Message-ID: References: <20250901033220.42982-1-yukuai1@huaweicloud.com> <20250901033220.42982-15-yukuai1@huaweicloud.com> 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: <20250901033220.42982-15-yukuai1@huaweicloud.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Btw disordered IO sounds a bit odd to me. I'm not a native english sepaker, but in the past we've used the term "I/O reordering" for issues like this. > + if (split && !bdev_is_zoned(bio->bi_bdev)) Why are zoned devices special cased here?