From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A61A223372D for ; Wed, 5 Mar 2025 15:18:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741187882; cv=none; b=bodsOQZVp+hJGDx94yiPw8j8YiYpJfwuVVD8VXfLb20BzSgN0YzxrArUDlN6FTidy/kuL05NvT5yoYQ6CLFm/QM9yzp1dPkeBuYEbKM2AVxZSt5xlsTHguSSu6Ewp6Kj3TzytMEndFWeqSzA90y8ZlEr20oxEcwQU+NDrCg8Cw4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741187882; c=relaxed/simple; bh=4/XUH4d6qHByGlAYL7Gr+YXKagxCHVRhwdzC2f31ZOA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=YmkHunFP7L3FNdlQVAtshw2y/GZojEVu8U3H/5YgyqYrUDK1rKlt6rKnr97bX3RlFkC7mX68Yf1veIL+TkfnFyNAt+XVsBDufInmj0MCm/cwP54ty/6CDuYsGbgtiAVsU63i0Dgqu0Bo/1Z4yX+UlWqBr68/ok1imzKZhqWw/zA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Nl73jgPh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Nl73jgPh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5474FC4CED1; Wed, 5 Mar 2025 15:18:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741187882; bh=4/XUH4d6qHByGlAYL7Gr+YXKagxCHVRhwdzC2f31ZOA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Nl73jgPhaTVbXFF+Cs/OL3fP5WkoaXbJnkKhHT1HzgT8uZk5UPXw4o+Im78AtGGDJ Px7Jc5A4uaG7Zl2iCzQufMeMhuuKYsWAP1d0euB7b/JNV9RqZZuNlh6Am5fnsNlE0H 6dvl/rAe2U8UwfTiXqWJTNuX8LF8+vvlw/NFKnSSfDTvbJfdMcq9z68iLxRmGC+L1f P43xWh+eNdUF9nxofS6ZRejz4Y8JFHRjNW2Iy/gsX0PUKjbGjVPPuBKoKlkFXS1t4o eKodc7Y7es0UkWalQR6lijVH75ldm014ztpzev4pBB2IoFeMBSfP9tgV9avVrVeE/i ATHAmOyB72t1A== Date: Wed, 5 Mar 2025 08:17:59 -0700 From: Keith Busch To: Christoph Hellwig Cc: Hannes Reinecke , Sagi Grimberg , Nilay Shroff , John Meneghini , bmarzins@redhat.com, Bryan Gurney , linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, Marco Patalano , axboe@kernel.dk Subject: Re: [PATCH] nvme: remove multipath module parameter Message-ID: References: <20250204211158.43126-1-bgurney@redhat.com> <7c588344-f019-4939-8a93-0a450481d4bc@redhat.com> <8a1730a1-1faf-4722-99e1-c3a85257b6f4@redhat.com> <2ff87386-c6db-4f2e-be91-213504d99a78@linux.ibm.com> <0656b66c-dd9c-495d-b1fc-4f09e763fa66@grimberg.me> <91ae613a-7b56-4ca0-b91c-6bc1eee798b8@suse.de> <20250305141554.GA18065@lst.de> 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: <20250305141554.GA18065@lst.de> On Wed, Mar 05, 2025 at 03:15:54PM +0100, Christoph Hellwig wrote: > On Wed, Feb 26, 2025 at 10:55:21AM +0100, Hannes Reinecke wrote: > > Plus there are some NVMe devices out there which _despite_ being PCIe do > > report NMIC and CMIC set (I won't name names, if you came across them > > you'll know) > > ????? > > NMIC and CMIC is perfectly normal and expected for multiported PCIe. > WTF are you talking about? Obviously he's not talking about multiported PCIe. And he's right, the behavior of a PCIe hot plug is very different and often undesirable when it's under native multipath.