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 A25A21119A; Fri, 3 Jan 2025 09:26:46 +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=1735896408; cv=none; b=K/8Ntiy4bYw3ogh//DjfHkcHhHu1trwKtjeKC5WVl8gU2ZyRu5ryoRvZklVQJ9zBvtVpmaCXhZUfS0xgbfmfwbZBQ/qCbEs90lgvL3ThBlqmGBB2/VV1jMwkjtxE9zLzrauPkpqNEWAzhCFH4OTPA9V1u/XPYJWbbjih1lDbDW4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735896408; c=relaxed/simple; bh=r12MOnn1uesY7j1pRUihCeTf3pHRkYo3YfSJvunhVU8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=BMr6v1PxbnMQ2LoBzfobyFW3dD1xFrBZnJOh3TxCS6yS/D1808ynLt+WXAmzS0FxNFU+VE/uGXeEy+pKjbh/Z2UvJgyxFlGPZlcFzUhg1u8VYXY22R+vm31Xk3XTspBwCda2mI3I6QdZWABg4acGasZlMAPOc772TSyOoRF1gnA= 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=qxl5Awe0; 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="qxl5Awe0" 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=jmVJJz+38rmIB/8qMaixIq1CEISbYL2BWv1447YsIio=; b=qxl5Awe00UrxQyzxcnu9RkYyU0 fF7vfHF92LW1CXnqoogPXuc5wSjvtp0ZbkUgKPyloKemOnkrKKemSlIuSYlX/kxcb4ivp5N/rhZA9 fYZl6bCab7DquVIsYm4heHU/+qg8Iqt3exliDH8vijZTaC15RV9m5iToT8tIhJRYUozjlgYZgfwTT jDsAr6t6nskr1oZ6o8xQI6W1tSq//M6oqZQJSOTvmbKVoLDMoLasZE5zFrhrWFVnOGnhahFlmYN27 k6KH0W04gIETO3ueK1k7r5mBmTuDgecZQrXZt+DRalO/3+27/qFhlzwFB94QKStzxvjK07nKTXNJj eVLla9jQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tTdx8-0000000Cbaw-0eXi; Fri, 03 Jan 2025 09:26:46 +0000 Date: Fri, 3 Jan 2025 01:26:46 -0800 From: Christoph Hellwig To: Vishnu ks Cc: lsf-pc@lists.linux-foundation.org, linux-block@vger.kernel.org, bpf@vger.kernel.org, linux-nvme@lists.infradead.org Subject: Re: [LSF/MM/BPF TOPIC] Improving Block Layer Tracepoints for Next-Generation Backup Systems Message-ID: References: Precedence: bulk X-Mailing-List: bpf@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: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Wed, Jan 01, 2025 at 12:04:56PM +0530, Vishnu ks wrote: > - I'm developing a continuous data protection system using eBPF to > monitor block request completions > - The system aims to achieve reliable live data replication for block devices > Current tracepoints present challenges in capturing the complete > lifecycle of write operations This is nuts. No, we don't guarantee any stability in the trace points, and certainly not for data integrity operations. Please make sure this never gets near any production system.