From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: raid5-cache I/O path improvements Date: Tue, 8 Sep 2015 11:25:46 -0400 Message-ID: <20150908152546.GB13749@mtj.duckdns.org> References: <1441603250-5119-1-git-send-email-hch@lst.de> <20150908002840.GA3196542@devbig257.prn2.facebook.com> <20150908061215.GA23833@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20150908061215.GA23833@lst.de> Sender: linux-raid-owner@vger.kernel.org To: Christoph Hellwig Cc: Shaohua Li , neilb@suse.de, linux-raid@vger.kernel.org, Kernel-team@fb.com, dan.j.williams@intel.com, "Martin K. Petersen" , linux-ide@vger.kernel.org List-Id: linux-raid.ids Hello, Christoph. On Tue, Sep 08, 2015 at 08:12:15AM +0200, Christoph Hellwig wrote: > Tejun, do you have any updates on libata vs FUA? We onable it > by default for a while in 2012, but then Jeff reverted it with a rather > non-descriptive commit message. IIRC, some controllers and/or controllers were choking on it and it didn't make any noticeable difference on rotating disks. Maybe we can try again with controller white list and enabling by default on SSds. Thanks. -- tejun