From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (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 10EB537DEAA for ; Thu, 12 Mar 2026 21:05:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773349523; cv=none; b=OI8ZUtS7EMRqH6N/M8d56kWZ1lYI1ADP5FFtkBfNRMXiP+O1U5PjE+4ZhU6vTM84ITiRT7gBlVAqlvZ4wpR3Nv0tJ9bZuZMwpnYSXdc4nGsgp1N/xSxINol2A3wH71O/bEljXGlbky8qX2l1POgHo6jd6mFNtNleTw+kuooQo3Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773349523; c=relaxed/simple; bh=ZOGZLNz80LFnN03as665nlykWPmZKB7PUGLuZ8BYLrE=; h=Message-ID:Date:MIME-Version:Subject:To:References:From:Cc: In-Reply-To:Content-Type; b=dmVh6BHKu2LJfY7aOXRaXKDFMIvL28+fkrCDdd0uC+Y9NNS2fdccbu13+BE61gCfRc+35gmwB2J4lUozSsnToAiLS/o7Ki2qhEpcSUtHZMf0gVRxmN6E7hTSGZr/OpBRalPdfDTx9n9Ov4xKKecv3EcaoITPMf//y3aSfsqk0+s= 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=Bq6NDM7n; arc=none smtp.client-ip=209.85.128.54 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="Bq6NDM7n" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-4853589700fso760535e9.1 for ; Thu, 12 Mar 2026 14:05:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1773349520; x=1773954320; darn=lists.linux.dev; h=content-transfer-encoding:in-reply-to:cc:from:content-language :references:to:subject:mime-version:date:message-id:from:to:cc :subject:date:message-id:reply-to; bh=/Kvczvfb6NHBT+oBoDYU/stDa9gqjgg6rGXeYbp7MTw=; b=Bq6NDM7njJSzVKNA227a9T1XoFbQfvoSTO5ZIQ7gHgFKgE0tZLXhdS8KiqWoIlT948 di3L517b73E10tln3ghw4BViRwnJAEnJIb92EPDyvJ/rhe3KF2garD7dpySIAiYh+NZ1 7KvBvvhzeMLv5puGq63oaRLUI37lP4V1wHiIeNjoJRE9lHvjiuW3QxsZCuJWJVQcGVSo sYUDdEmoXMufjzTcBe/qROOx3h85QqnXEKH0L1KQlht1iIDzMD0yYUjF1XHS5SqKpnf6 eb7DwRHtYs88xpFA4nm3mYFV/e7e2SInltfOKM3hVFdAfayMlT8vAEZq3zYMR/JGXn5V YdHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1773349520; x=1773954320; h=content-transfer-encoding:in-reply-to:cc:from:content-language :references:to:subject:mime-version:date:message-id:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=/Kvczvfb6NHBT+oBoDYU/stDa9gqjgg6rGXeYbp7MTw=; b=ldV3bzJSETLW+COY2JF8SaofgugZYyy7eZwnZsXGp6MF81KbZIJYeNIGWeQMFcgcMC uMIPvNIiYHkdpXbCMeWID+QA+mUXuhHHd39eYQK6qaY8G97p8o9wJfj/b7HSdk0AqQXY hc2oDUzWeg5qf2fvW7wfpctfVmKv6MkNO8knx+bc2Oi/uLI0pMED6NXiizCkQ5yr2VE4 ihA9VnPhgKdjytPpQVRk12o2gjRXfN0LaLduf/oxk0tgrMliOeUIDC1blmRA1s4NFE/l LtLMuRze9W2qTx0r7ovlG4S+tqCbOEidhri7a3zJ80Vln29UsGY8Pcgp0a/AG1z9tS6C N3lQ== X-Gm-Message-State: AOJu0YxN+vAfIn0KaB1IMNzzA/rGjUXA0wM2lJfyyRaofHk1oSB3fhMG Hrz4OUKOw4aiH8Wisq0jVGzwlvB5mxd7/ccFukMdgrDzMBqTet+kisY= X-Gm-Gg: ATEYQzw57S1zg2QTkfhwG5gIJjB11Q6LtQt45/e49eCzm8BTzvrkvr1PXHT9NyTf0EP AIzguLGwnBToZt1/fnRgxB5be3rtFmK5CLWz56+Nqydtcok+HgD266bk4igMUjeSSVVvnVMo/+2 ixOUn2MhU9ZQVEiT8HYQ+NJZSr8juRiDfhYHG8kIDAtVTtVNRISit4Ngh+ZwKhdyLMfIF3Lm74T 52hiA4wvK1S2hk6JbP8yJDPGtIfgt1lS11ciB4baCSVwrUpt7oGuzrijSn0VmQr91AdATvqwbOA BtY3q+Sl+4VPFfP/fwfaaUqGzDlKrMwDbtE2vUAL1yWRjpuBdIvLVHTRugp5kAJE0KpWFuqMsl4 ON+De9W/KobeE82EYnhfKRc4P1VELBqoqW8ngy/nyAgdeU6cXXL3L9seGeh1n9fQ4rt4oSdEwaT q1Mzy6zLNVUl74Gy784dft372qyfSYcVQO4vJM9HG4YFFglseR1QeNOiBtRqHYEX/1P+g= X-Received: by 2002:a05:600c:83c5:b0:485:2fe9:33a7 with SMTP id 5b1f17b1804b1-4855670529bmr6262535e9.3.1773349520219; Thu, 12 Mar 2026 14:05:20 -0700 (PDT) Received: from localhost (219.red-80-39-142.dynamicip.rima-tde.net. [80.39.142.219]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4854b66e3f8sm156441785e9.14.2026.03.12.14.05.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 12 Mar 2026 14:05:19 -0700 (PDT) Message-ID: <2fb4a070-607a-4e59-9766-e793d4af49f6@gmail.com> Date: Thu, 12 Mar 2026 22:05:18 +0100 Precedence: bulk X-Mailing-List: dm-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [PATCH 0/1] checkers: add alua path checker To: Martin Wilck , Hannes Reinecke , Brian Bunker , Benjamin Marzinski , John Garry , Wayne Berthiaume , Yanfei Chen , heyi , Nigel Hislop , NetApp RDAC team , Steven Schremmer , Martin George , Matthias Rudolph References: <20260312001642.53321-1-brian@purestorage.com> <91ed7162-719f-4ff2-9951-913fe8096f08@suse.de> Content-Language: en-US, en-GB, es-ES From: Xose Vazquez Perez Cc: DM-DEVEL ML , SCSI ML In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 3/12/26 5:48 PM, Martin Wilck wrote: > Actually, multipathd could use TUR for checking unless we receive an > event of this type. multipathd could listen to those events and then > retrieve the new device state(s) from sysfs, without sending an RTPG > command itself. > > We wouldn't switch to the alua checker by default anyway, so the > vendors that prefer the sysfs prioritizer won't be hurt even > if that doesn't work. Just one observation: currently there are ALUA arrays (NetApp E/EF, Dell Unity) where their own checker is preferred. As well as software-defined storage (Hitachi Vantara VSP One SDS Block, Linux-IO (LIO) Target) where directio must be used.