From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id n3JFpYbQ258284 for ; Sun, 19 Apr 2009 10:51:34 -0500 Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E664C1432290 for ; Sun, 19 Apr 2009 08:53:58 -0700 (PDT) Received: from mail.sandeen.net (sandeen.net [209.173.210.139]) by cuda.sgi.com with ESMTP id n2UXMgDt6DmqtewH for ; Sun, 19 Apr 2009 08:53:58 -0700 (PDT) Message-ID: <49EB487C.1020205@sandeen.net> Date: Sun, 19 Apr 2009 10:51:24 -0500 From: Eric Sandeen MIME-Version: 1.0 Subject: Re: XFS support for TRIM / blkdev_issue_discard? References: <20090331053013.7642414167108@attica.americas.sgi.com> <49E4A131.5040309@isg.de> <20090419081927.GE16929@discord.disaster> In-Reply-To: <20090419081927.GE16929@discord.disaster> 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 Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Dave Chinner Cc: Peter Niemayer , xfs@oss.sgi.com Dave Chinner wrote: > On Tue, Apr 14, 2009 at 01:32:35PM -0500, Felix Blyakher wrote: >> On Apr 14, 2009, at 9:44 AM, Peter Niemayer wrote: >> >>> Dear Felix Blyakher, >> Hi Peter, >> >>> do you know whether there are plans to support the ATA TRIM command / >>> blkdev_issue_discard() call in XFS for Linux anytime soon? >> This topic was indeed brought up in xfs discussions. >> Though, we don't have any definite plans on supporting it yet. > > I did some initial work on tracking extents being freed, but then > the TRIM request morphed into a "tell the largest free space around > the area just freed" and that is much harder to do than simply to > issue a "we just freed this bit" command. FWIW, ext[34] is still doing it block by block. At least for SSDs, I think that's fine, isn't it? For think provisioning it might be different. I think (?) the simply block-by-block free is still relevant, no? -Eric _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs