From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-100.freemail.mail.aliyun.com (out30-100.freemail.mail.aliyun.com [115.124.30.100]) (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 7DE913B19C4; Thu, 18 Jun 2026 10:54:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.100 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781780045; cv=none; b=ZEjQcDwOZnPhXMV68yOGc+q6NSy7wpmyRC53KwtU7rx5HPEagakrc/vsQhis4jWB3srSjmW/mCbb4F5LLp3bn67bEePmNqPMT9WvJjqxABFJHspR2TPZ+je9cg5yKx1fBVzih3frYwVy7uMgA3wS6sNThkkFl1Es+XBQJfM6W2o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781780045; c=relaxed/simple; bh=+JcJnLqHc6qHbEdjpjkJ62l8TIcEJlxQaI0kJSbcCMQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=oUUvSA6U1gISENk8Dzf+TssTHUb/ajjerav0Uye9UZr6fyfG0UJdFWvSKlKdf5XLyEUGtU8gB3fTxOE0c2j69jW/euR4coX1zgz7Rm0NVJFoe7flzwo6t0B1pkzua0x3v57wTeCQuNxOpHcKoTW/UMagwQBLNzU8OTudolDtah0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=WKmi8MXv; arc=none smtp.client-ip=115.124.30.100 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="WKmi8MXv" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1781780040; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=tEOH4b2VpB+R+W//mgS8StroH3m8ebqKTodvw52Ib3A=; b=WKmi8MXvpD9yn8Oy2sNzj+JoNjctliE2Ww1cLJ9v2HILtcIPW7eiR79r0Bi0NpIigQKBsJhA7JUUycZfZHfPpc3hpYtSRG3ZVCbhOGwlgqA2cPt8/n5MV1QzcgeDpR2CrEenQS7sZ+HlNwRhtQUyLzWYCbOdOs08LO6C50L2a1M= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033032089153;MF=hsiangkao@linux.alibaba.com;NM=1;PH=DS;RN=11;SR=0;TI=SMTPD_---0X56mOtU_1781780038; Received: from 30.120.66.214(mailfrom:hsiangkao@linux.alibaba.com fp:SMTPD_---0X56mOtU_1781780038 cluster:ay36) by smtp.aliyun-inc.com; Thu, 18 Jun 2026 18:53:59 +0800 Message-ID: <256c70c6-d4aa-493c-b777-ea9ab6298c93@linux.alibaba.com> Date: Thu, 18 Jun 2026 18:53:58 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: don't merge bios over iomap boundaries, was: Re: [PATCH] erofs: prevent buffered read bio merges across device chunks To: Christoph Hellwig Cc: "zhaoyifan (H)" , linux-erofs@lists.ozlabs.org, linux-kernel@vger.kernel.org, yekelu1@huawei.com, jingrui@huawei.com, zhukeqian1@huawei.com, Ritesh Harjani , "Darrick J. Wong" , linux-xfs@vger.kernel.org, Joanne Koong References: <20260612033244.993507-1-zhaoyifan28@huawei.com> <58bef9af-0926-4948-b917-e38c3793f596@linux.alibaba.com> <7a38b823-59f3-419e-9070-cbc848f6f1fe@linux.alibaba.com> From: Gao Xiang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2026/6/18 18:27, Christoph Hellwig wrote: > On Thu, Jun 18, 2026 at 06:14:03PM +0800, Gao Xiang wrote: >> I think this patch can go alone seperately because the >> correctness is okay and cross-subsystem git merge is >> a bit of churn. >> >> I've pushed an chunk merging patch individually to -next >> for this cycle too, and it should fix too many bios issue, >> but even without that patch it won't impact the correctness >> (just less performant.) I assume both patches will upstream >> in the near future. > > Thanks. I'll get this patch dusted up for a formal submission in a bit > and will send it out. Thanks for the patch in advance too. Thanks, Gao Xiang