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 75A4B2441B4; Tue, 20 May 2025 13:46:56 +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=1747748817; cv=none; b=Nu55AerDcEN8yoqfro27Ob/3aP4T0qvZ2A+d9TuPWaLKOwwcYEVi0jkYKP1SJ+lejrSMut5gxbB4HDC/JQGvKmIu+abT7sYDZ1rBD24mPIYtLGjoiFhBvnSb0Js0s52uEahwDnRM/D4wudS3sXuyX70Vegm9x2yXSJ9vGvB3vGo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747748817; c=relaxed/simple; bh=gT0qsOxXBK/hI+CUQi4J6/Jupa+PoB/pzblsZBJac08=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=DL95EdTyq9dM8QHY8rognDp5sESW4wJcwb1zyeoad+cXLWb6ydN1A11GBUOv0SEHqhKidBajFMFlvm9ZTY+Ntzk0VsNsvKFJdLvrc1Jm8LoU5ANNFAmrY+dRE2gNeswEKoH3dZob/PbXPQ5AaQt1hGWuR782GY3k+1lh5O6MT5k= 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=0mWEg9bq; 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="0mWEg9bq" 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=042DvXqa0a9B9ggp4H5ETGqUUlZKP5UrH69lkxaNfCM=; b=0mWEg9bqPw8ZR9QDSBnQ55JuoV QOu6tZiYPLjBamefsfJEjWOQ1kjGecUvp3K1MLPqG1qIH/loFq1uLS32wr9Cq7vVLmZ5KMKeBIWUA HQZodUM1r4toW3pw+KI4komYwwahG2GR4ntl4dBS8ORTCNHlry5nKOa0Y1HlJVg19WHzMjf4hOYqm ZpKanebfZcHQ0JXXkGqoJZSw2uUCzRmB99w2i/Y+99egzwnjSDJ8gMB7rxgdOBw3oMSEhTyUkYYzj JTWd2zIP5cwyJba/j7uJLSHLxRasMiT+JqxGyh8tNsSX5ZQr4yxSgv0VQhm8mtT9ITaUuVpuTuHdH tA4kiKIg==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1uHNJ2-0000000D3tD-0JWC; Tue, 20 May 2025 13:46:56 +0000 Date: Tue, 20 May 2025 06:46:56 -0700 From: Christoph Hellwig To: Martin Wilck Cc: Christoph Hellwig , Kevin Wolf , Benjamin Marzinski , dm-devel@lists.linux.dev, hreitz@redhat.com, mpatocka@redhat.com, snitzer@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/2] dm mpath: Interface for explicit probing of active paths Message-ID: References: <20250429165018.112999-1-kwolf@redhat.com> <47dd225b433b0df585a25084a2e793344eeda239.camel@suse.com> Precedence: bulk X-Mailing-List: dm-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Mon, May 19, 2025 at 07:33:50PM +0200, Martin Wilck wrote: > I still don't get what this buys us. You get one layer to deal with instead of polking into a leak abstraction. Qemu sees a block devices, checks if it supports persistent reservations and everything is taken care underneath instead of having to try to understand what is below and working around it.