From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id p9BG6gMq010962 for ; Tue, 11 Oct 2011 11:06:42 -0500 Received: from mail.mnsu.edu (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D084E1BD069 for ; Tue, 11 Oct 2011 09:06:37 -0700 (PDT) Received: from mail.mnsu.edu (Mail.MNSU.EDU [134.29.1.12]) by cuda.sgi.com with ESMTP id iKblBF9UMCLO1cJS for ; Tue, 11 Oct 2011 09:06:37 -0700 (PDT) Message-ID: <4E946980.4060702@mnsu.edu> Date: Tue, 11 Oct 2011 11:06:24 -0500 From: Jeffrey Hundstad MIME-Version: 1.0 Subject: Re: TRIM on XFS References: <201110071352.20135@zmi.at> <20111007233450.GK3159@dastard> <201110100829.45823@zmi.at> <4E936BFB.5060907@mnsu.edu> <20111011020552.GY3159@dastard> In-Reply-To: <20111011020552.GY3159@dastard> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com Dave, Thank you. I suspected this may be the case. It is awfully nice to have a definitive answer though. It is especially nice to have a way to determine if it is possible. Thank you! I've created a an XFS Wiki page for this info: http://xfs.org/index.php/FITRIM/discard -- Jeffrey Hundstad On 10/10/2011 09:05 PM, Dave Chinner wrote: > On Mon, Oct 10, 2011 at 05:04:43PM -0500, Jeffrey Hundstad wrote: >> On 10/10/2011 03:28 PM, Greg Freemyer wrote: >>> fitrim is the batch mode. >>> >>> To enable realtime discard, add --discard to your mount options. >>> >>> Documented athttp://lxr.linux.no/#linux+v3.0.4/Documentation/filesystems/xfs.txt >>> >>> To invoke batch mode, simply use fstrim from user space. >> Hello, >> >> I'm also trying to use FITRIM on a simple XFS partition on a >> spinning magnetic hard drive (remember those). I haven't had much >> luck. I'm doing this just to get used to the commands when using >> this against a thinly provisioned disk. I have no idea if this >> should work in this configuration. >> >> On a Debian system with Linux 3.0.0-2-amd64 when I issue: >> # fstrim / >> >> I receive: >> fstrim: /: FITRIM ioctl failed: Operation not supported >> >> With an strace this looks like: >> open("/", O_RDONLY) = 3 >> ioctl(3, 0xc0185879, 0x7fff4ea851b0) = -1 EOPNOTSUPP (Operation >> not supported) > It means the block device underneath the filesystem doesn't support > the TRIM operation. Check /sys/block//queue/discard_max_bytes - > if the value is zero then your device doesn't support discard > operations. > > Cheers, > > Dave. _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs