From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754568AbcARK0F (ORCPT ); Mon, 18 Jan 2016 05:26:05 -0500 Received: from mondschein.lichtvoll.de ([194.150.191.11]:50509 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753977AbcARKZ7 (ORCPT ); Mon, 18 Jan 2016 05:25:59 -0500 From: Martin Steigerwald To: Chris Mason Cc: Linus Torvalds , Btrfs mailing list , LKML Subject: Re: [GIT PULL] Btrfs Date: Mon, 18 Jan 2016 11:25:57 +0100 Message-ID: <3289863.t1Fo0U0Yqz@merkaba> User-Agent: KMail/5.1.54 (Linux/4.4.0-tp520-btrfstrim+; KDE/5.19.0; x86_64; git-70d2ff1; 2016-01-17) In-Reply-To: <20160117233033.aowuldoul2cfuaad@floor.thefacebook.com> References: <20160117233033.aowuldoul2cfuaad@floor.thefacebook.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Chris, Am Sonntag, 17. Januar 2016, 18:30:34 CET schrieb Chris Mason: > For very large filesystems (30T+) our existing free space caching code > can end up taking a huge amount of time during commits. The new tree > based code is faster and less work overall to update as the commit > progresses. Will be interesting to see whether this also helps with: [Bug 90401] New: btrfs kworker thread uses up 100% of a Sandybridge core for minutes on random write into big file https://bugzilla.kernel.org/show_bug.cgi?id=90401 Thanks, -- Martin