From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f170.google.com (mail-pl1-f170.google.com [209.85.214.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3D074624; Sat, 18 May 2024 00:53:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715993585; cv=none; b=GxHFI9GSLFZDbD389K01GWlRT/MEzn24ZmJZpnnsMY34R784hGMqp2mVcoLad83RdxIOZPMArurteDW5unzvTxk0HfY6who+udyIc9YoSq/6ZOhu3myTqdk6fbxtIkeEmwm58EejLzwXO78XKktW2LDbnlSCHihSGmbCl7PC7Vs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715993585; c=relaxed/simple; bh=kxpNGd21aNnFsS8Tun+x1viqQNqfEmOXf6AfWQzZkhc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ilpl/AyuZkydrvBkgVlMyXxxC7Svh2LgQnt49zjz52KvomPDDpTtT82ZOr7mitsFbBF6VCASHdRwugAvTl3m2ztz/K9NCN7I8rtkDoXzQ8BWFIgraVFvUFZWNRZu4Z/TYlN3C0QJd/CN2SyjdY3M4jedzl4bwb7aBbtUslK6lKY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=g/nnhePA; arc=none smtp.client-ip=209.85.214.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="g/nnhePA" Received: by mail-pl1-f170.google.com with SMTP id d9443c01a7336-1ec69e3dbcfso28224975ad.0; Fri, 17 May 2024 17:53:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1715993583; x=1716598383; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=2bIw/FmfmnY1dbtLfrsgC3aPpzWY8ZVFcFhTBEtvdIg=; b=g/nnhePAhxOUQ30UjmlpTybAIr67vBG/a/ehPy/h/RMbMy8WnNsNr3rOi5rgnzqXzp DDn9/04+1HSJ+aByDOixbwCqeOWT1zrVwL1Vxy6pGPUXaTUIrybIZBfIusjZ3Op7cRZY B6rRQ+0yOQaDzd+3qNtWL8SklX54DCui7UHtSutRAezBVjamqjIy0t/1tZqJjXaV3y8x 9tvRGZzuhEmrwB1AUXv5/z4s15aE8BXxKyDStuigkKQzGqDYL7pxgGe/1OnXR1aQCA6t EC9W8PKtvVCG58c36lKD4ountfTHmTuO6EKWmyJV+zt1yvsk24mf62RmKfAgpCe8a61e 6J4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1715993583; x=1716598383; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=2bIw/FmfmnY1dbtLfrsgC3aPpzWY8ZVFcFhTBEtvdIg=; b=FGKgaG7CTXfElp2EHbxTgBmZfYpEeimBi+lmUARX9dw/FUF/AJGluYKAhbDD9+xdek NO6wd4EBpiw46xhPHVdIReeLpuFDcObwAe/eXFe1fSZd0WDAvfV1Q7zqtG7vjGQs5n4I Q/09+WOZ85XegtFAD01LBfMYk/wMB6xDb/zZpTXSqb6lhO7T6O37XSP0dNUmBJ7nAdcj vwcjTG6qKuRqRFxnydRptbc+kRXAlPT3ENZO/3YhoLQxnOgqGpzoEG+oRFLuoixapm88 M4ScC5R2D0HjGUjOI00nY+XNgK9ppU4uEL/gf+ZYXtnmY+KQZquLPDJ825O5cX3j5ZqY Q+zA== X-Forwarded-Encrypted: i=1; AJvYcCWFs0TXP8tMzLf3BaaYtIElFhNeOH13ykt6F/K4x9a6jfJeamCFdJdNmAIWBbQZfqwe97aZkU/ZFtCCq9gznGwC73/l13JGwOK0RV+TezMEgnbGORb9bQlIHuZyO3uX8w3QC0TXxQckodnkFz8BcGrZXuwNlcqWqOeHvuO+1M2ytwY= X-Gm-Message-State: AOJu0YwufMuElQzGoRozoEOejeAZBBHgn7vwPvTmhKkCsTTLmHfhAoVF eV6i0buvvTeHpBld5Q1mt/02YWBcHFtw/qz1/VOH1fJRXcB9kw41 X-Google-Smtp-Source: AGHT+IHKWMGs9nZ9glGJICXGp/lnk3zbLGPv06pwuWoh7CMFd7JnCV+l588sA4B0uKWcpckylTUjow== X-Received: by 2002:a17:902:e5d2:b0:1e2:a31e:2062 with SMTP id d9443c01a7336-1ef4404a35dmr306433475ad.53.1715993583310; Fri, 17 May 2024 17:53:03 -0700 (PDT) Received: from [192.168.50.127] ([147.78.243.100]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1ef0c0374ffsm162886825ad.220.2024.05.17.17.53.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 May 2024 17:53:02 -0700 (PDT) Message-ID: Date: Sat, 18 May 2024 08:52:54 +0800 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH stable] block/mq-deadline: fix different priority request on the same zone To: Bart Van Assche , Wu Bo Cc: axboe@kernel.dk, dlemoal@kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20240517014456.1919588-1-bo.wu@vivo.com> Content-Language: en-US From: Wu Bo In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2024/5/18 01:53, Bart Van Assche wrote: > On 5/16/24 18:44, Wu Bo wrote: >> So I figured this solution to fix this priority issue on zoned >> device. It sure >> raises the overhead but can do fix it. > > Something I should have realized earlier is that this patch is not > necessary with the latest upstream kernel (v6.10-rc1). Damien's zoned > write plugging patch series has been merged. Hence, I/O schedulers, > including the mq-deadline I/O schedulers, will only see a single > zoned write at a time per zone. So it is no longer possible that > zoned writes are reordered by the I/O scheduler because of their I/O > priorities. Hi Bart, Yes, I noticed that 'zone write plugging' has been merged to latest branch. But it seems hard to backport to old version which mq-deadline priority feature has been merged. So is it possible to apply this fix to old versions? Thanks, Wu Bo > > Thanks, > > Bart.