From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta1.migadu.com (out-253.mta1.migadu.com [95.215.58.253]) (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 B1FD930EF9A for ; Mon, 28 Sep 2026 10:17:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.253 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790590625; cv=none; b=jcFsVrto9JucagYQiPCZK76NwZ2BeTFG+yJBDbWwUIJ873VQMCR6D4UywYWu6qvl8lkg6o2mwPdActpwJST6oUjm+WXOQ5A3tBAHUL++Q8yWUy9RhuFzK8phoZHpU2e/zp3f/jbkXgzqAUy4o1+FxyohPZ0sCmqeG38ttYgVPAI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790590625; c=relaxed/simple; bh=S7HtiBzV+yUVKZNtjNQwGaJxuNAlauHZCZOJNOl8s7s=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=MWNwBLa519HyhcxSODgMxbQIXYQ43GsOsCGnOUWmQ7KXgtiJh1HYO6vxCMvrspTEJZ6bo2SAPpdNj2xtH/ZYmzSWa0TUt7gLJM1S5+icGpu502wq/ARWZCQQ99fPAqxZjbAvd5RYW+bw5jGe2fI8fOXayOhSuz5f590MqvMxiks= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=i/6+7XK5; arc=none smtp.client-ip=95.215.58.253 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="i/6+7XK5" X-Envelope-To: linux-block@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=S7HtiBzV+yUVKZNtjNQwGaJxuNAlauHZCZOJNOl8s7s=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1790590620; v=1; x=1791195420; b=i/6+7XK5BIJzUq7myo9J/2fbAPlOher3Z0TrsisQS+8D5qmGHb874cptiUkxyzwKusR27YOF rIO/tmoQwJfWvUYdDDbKEZnMbBT98mgU4qE8KPfKX3oOXLSm9TJGjgYYHeN9fjy9dwMXomLbmQn zVum6wgvDIwN06pBivbsYLK0= X-Envelope-To: linux-block@vger.kernel.org Received: by mta12.migadu.com with ESMTPS id 951cb6a3c28291de; Mon, 28 Sep 2026 10:17:00 +0000 X-Mizu-Trace-ID: 951cb6a3c28291de X-Migadu-Flow: FLOW_OUT Message-ID: <2258be48-9e35-4139-b423-82400746db8c@linux.dev> Date: Mon, 28 Sep 2026 11:16:59 +0100 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 0/4] fix NVMe multipath partition diskstats To: Christoph Hellwig , John Garry Cc: axboe@kernel.dk, kbusch@kernel.org, sagi@grimberg.me, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org References: <20260921083752.1154316-1-john.garry@linux.dev> <5fe0a938-aaf4-46cb-8fba-3524586ac5b4@oracle.com> <20260928091428.GA29876@lst.de> Content-Language: en-US From: John Garry In-Reply-To: <20260928091428.GA29876@lst.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 9/28/26 10:14, Christoph Hellwig wrote: > On Mon, Sep 28, 2026 at 08:30:10AM +0100, John Garry wrote: >> On 21/09/2026 09:37, John Garry wrote: >> >> A reminder on this one ... or are we just going to leave this broken? > > I find the amount of overhead and relatively invasive code very > offputting, and I still don't understand why we now have a strong > urge to address this after 10 years. Nobody noticed (that the values are not maintained), I guess. It may also be useful to have the per-path disk partition table in future for other reasons. Anyway, your call, so I'll leave it for now.