From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 59DF821CC79; Fri, 16 May 2025 05:57:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747375031; cv=none; b=n6vcwONHTe/zSwJ3dxrC6FuEmpC3LnKtcnivJQHvu0vN/R7QD7suWtAaeK9GPR+8UXkA1Pc11cA+1SHZPJyzQVWkzJ38kbXCR+BB3LqPlg9e8JFtQ3nWwppxmzsCbtPrbEcTKkfIY7TfZp0KU6tRFoa6hbo3efDIsuH796+L660= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747375031; c=relaxed/simple; bh=9JdI+jOeuyQy4by4DCLlqp2ycKCjc71/EM4ukAm7xWs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=UJ68vbmVK8ZsdAZXSORpyulMYnz0V+WIJv+D6kq3EUi/8McVC5wTL7fd9NFClJx1dkJVFyWhJfRCUZ5hJhIAiy6Fm9mmnfdc5IUSeqjGD6PFcq0VRUQVjYh/eO1bn8XaeX12Gf+n8KR0q6C/ongRloz3vL3wacmR5DW96dYHVuQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=RdrVIbQs; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="RdrVIbQs" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=5A8B1+vuDbLdgEK1W25fWtT5e6F4vVts0Pbed2TmLZU=; b=RdrVIbQsqdO7ct10DgpGQefnvN Kwg8SbgpOrbW7h/9sHR1cwF1OBcdS1s6iNLRMUBUiPU9Bxzpl9QIFQSV3wO3Katf+30DuFxYolcBH DwEF2TzrmdrhXenHWGNd6jTKKpe4adv1E2XJHEd3+jljqpnFCirFZwS2uzwP/a67E9TQON/RVpYlX Od5Sca/jpAXFiJ6ho4LHONJRfSXfvsxeCIRQRRdVi9+nEwJj6diYGJlSds7xMZyTJ4AC7tAuWtFm+ kAtmRY2NJqo6CxFW8OjfBqYirIFWZZyiW+NvpcqUZNp9gZKZrU8l2YFE7FBcAZOVZBaz5hVHjinfY Kru9GWGQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1uFo4D-00000002XXf-2W7k; Fri, 16 May 2025 05:57:09 +0000 Date: Thu, 15 May 2025 22:57:09 -0700 From: Christoph Hellwig To: Martin Wilck Cc: Benjamin Marzinski , Paolo Bonzini , Christoph Hellwig , Kevin Wolf , dm-devel@lists.linux.dev, Hanna Czenczek , Mikulas Patocka , snitzer@kernel.org, "Kernel Mailing List, Linux" , Hannes Reinecke Subject: Re: [PATCH 0/2] dm mpath: Interface for explicit probing of active paths Message-ID: References: <50beb356b4dc000446fd186ab754c87f386eaeae.camel@suse.com> <2f0fc8ef7d04c590893bd6d54a6c0c842c4b21d7.camel@suse.com> <5911e91974db637d4a3395e60244c2c52b27b4b4.camel@suse.com> 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: <5911e91974db637d4a3395e60244c2c52b27b4b4.camel@suse.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Thu, May 15, 2025 at 05:00:41PM +0200, Martin Wilck wrote: > I didn't mean it this way. I was rather musing about the question > whether doing SG_IO on multipath devices by forwarding them to the > current path makes sense. It doesn't, and that's the core of the problem. Someone back in the day though just forwarding SG_IO would solve whatever thing they had to do back then and which didn't have a proper kernel abstraction, and it keeps adding problems.