From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 77CCE7F37 for ; Mon, 14 Dec 2015 04:27:58 -0600 (CST) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay2.corp.sgi.com (Postfix) with ESMTP id 597E9304032 for ; Mon, 14 Dec 2015 02:27:55 -0800 (PST) Received: from bombadil.infradead.org ([198.137.202.9]) by cuda.sgi.com with ESMTP id bR7CN7WmMiodEhI6 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO) for ; Mon, 14 Dec 2015 02:27:54 -0800 (PST) Date: Mon, 14 Dec 2015 02:27:50 -0800 From: Christoph Hellwig Subject: Re: XFS and nobarrier with SSDs Message-ID: <20151214102750.GA29192@infradead.org> References: <3496214.YTSKClH6pV@merkaba> <566E6524.6070401@xortex.com> <3911767.qVqsL1TcMv@merkaba> <20151214095823.GA30662@infradead.org> <566E978E.2070502@xortex.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <566E978E.2070502@xortex.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Georg Sch?nberger Cc: Jens Axboe , Linux Block mailing list , XFS mailing list , Christoph Hellwig , Jeff Moyer , Linux FS-Devel On Mon, Dec 14, 2015 at 10:18:54AM +0000, Georg Sch?nberger wrote: > > Or to phrase it > > differently: If nobarrier makes a difference skipping it is not safe. > I do not fully understand that sentence, what do you mean by "makes a > difference" and "skipping is not safe"? The rule of thumb is: if nobarrier makes your workload run faster you should not be using it, aka: don't use it. _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs