From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7847CC433EF for ; Thu, 26 May 2022 09:06:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232347AbiEZJGo (ORCPT ); Thu, 26 May 2022 05:06:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231982AbiEZJGo (ORCPT ); Thu, 26 May 2022 05:06:44 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32090EE1D; Thu, 26 May 2022 02:06:43 -0700 (PDT) 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=FFAIKEkbJZeiSFekp3ljhU7NUFXzNR9DXxiGVRu0Nx0=; b=z8amMr/6STOSfuq0B9KWyeNlCd JkAftNc9BuT65Jmos4DTDJ9mmbB3/w998MVwq93xrnsoINYD9x0wiktO+w+jg73Qmf9uczs263Dfc Xj6cuaQMCy+Bz+jCFDVFcJxqVMWdjjKAHH3UwyIQH0hWS+WLCVTnFxIPi3vZ/e9WOSD2KH9whduNf MZFgmpn5kw3q1wrFxQYb0CPC/SBvpMYQ+brCpnasu3cbQCP6Gg2NQSWbQvuYWO5VROKwRnp0FzluP 5AJ3rBNOJP73mJr7rEpJXVtUzbF5EkCNqlXi+vTSHVh6Z+oO2xIVNIg0hrE5JCPIyJ21VFjRBigKk IrOszSYQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nu9Rw-00EBBN-Hx; Thu, 26 May 2022 09:06:32 +0000 Date: Thu, 26 May 2022 02:06:32 -0700 From: Christoph Hellwig To: Eric Wheeler Cc: Christoph Hellwig , Keith Busch , Coly Li , Adriano Silva , Bcache Linux , Matthias Ferdinand , linux-block@vger.kernel.org Subject: Re: [RFC] Add sysctl option to drop disk flushes in bcache? (was: Bcache in writes direct with fsync) Message-ID: References: <958894243.922478.1652201375900.ref@mail.yahoo.com> <958894243.922478.1652201375900@mail.yahoo.com> <9d59af25-d648-4777-a5c0-c38c246a9610@ewheeler.net> <27ef674d-67e-5739-d5d8-f4aa2887e9c2@ewheeler.net> <5486e421-b8d0-3063-4cb9-84e69c41b7a3@ewheeler.net> <7759781b-dac-7f84-ff42-86f4b1983ca1@ewheeler.net> <77e7dbf9-d5bd-424-1ef7-8a1bb49e9010@ewheeler.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <77e7dbf9-d5bd-424-1ef7-8a1bb49e9010@ewheeler.net> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-bcache@vger.kernel.org On Wed, May 25, 2022 at 11:44:01AM -0700, Eric Wheeler wrote: > In your experience, which SAS/SATA RAID controllers are best behaved in > terms of policies and reporting things like io_opt and > writeback/writethrough to the kernel? I never had actually good experiences with any of them. That being said I also haven't used one for years. For SAS or SATA attachd to expanders setups I've mostly used the mpt2/3 family of controllers which are doing okay.