Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752725AbYKXDG5 (ORCPT ); Sun, 23 Nov 2008 22:06:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751571AbYKXDGt (ORCPT ); Sun, 23 Nov 2008 22:06:49 -0500 Received: from BISCAYNE-ONE-STATION.MIT.EDU ([18.7.7.80]:52742 "EHLO biscayne-one-station.mit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751075AbYKXDGr (ORCPT ); Sun, 23 Nov 2008 22:06:47 -0500 Date: Sun, 23 Nov 2008 22:01:11 -0500 From: Theodore Tso To: David Woodhouse Cc: Matthew Wilcox , Tejun Heo , Linux Kernel Mailing List , Nick Piggin , Jens Axboe , IDE/ATA development list , Jeff Garzik , Dongjun Shin , chris.mason@oracle.com Subject: Re: about TRIM/DISCARD support and barriers Message-ID: <20081124030111.GC2163@mit.edu> Mail-Followup-To: Theodore Tso , David Woodhouse , Matthew Wilcox , Tejun Heo , Linux Kernel Mailing List , Nick Piggin , Jens Axboe , IDE/ATA development list , Jeff Garzik , Dongjun Shin , chris.mason@oracle.com References: <4928E010.4090801@kernel.org> <4929023C.2060302@suse.de> <20081123123514.GI5707@parisc-linux.org> <1227447584.4901.405.camel@macbook.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1227447584.4901.405.camel@macbook.infradead.org> User-Agent: Mutt/1.5.17+20080114 (2008-01-14) X-Spam-Flag: NO X-Spam-Score: 0.00 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 736 Lines: 17 On Sun, Nov 23, 2008 at 01:39:44PM +0000, David Woodhouse wrote: > On Sun, 2008-11-23 at 05:35 -0700, Matthew Wilcox wrote: > > The current VFAT filesystem implements DISCARD. > > As does btrfs. I think I posted ext2 patches a little while ago too? Or > someone else did. Did they get merged? Looks like they didn't get merged. I thought akpm was going to merge them. Ext4 has discard support though. It doesn't port easily to ext3 since it ext4 has a new block allocator. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/