From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from verein.lst.de ([213.95.11.211]:55259 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750841AbdAXOtj (ORCPT ); Tue, 24 Jan 2017 09:49:39 -0500 Date: Tue, 24 Jan 2017 15:49:37 +0100 From: Christoph Hellwig Subject: Re: [PATCH v2] xfs: use per-AG reservations for the finobt Message-ID: <20170124144937.GA27261@lst.de> References: <1485194742-23185-1-git-send-email-hch@lst.de> <20170124140649.GC60234@bfoster.bfoster> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170124140649.GC60234@bfoster.bfoster> Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: Brian Foster Cc: Christoph Hellwig , linux-xfs@vger.kernel.org On Tue, Jan 24, 2017 at 09:06:49AM -0500, Brian Foster wrote: > Darrick called out in the previous version that this requires traversal > of the entire tree at mount time. Do you have any test results on what > kind of worst case mount delays we could be looking at here? Even with pretty horribly fragmented file systems I've not seen major delays. But I don't have a setup with a lot of actual disks but mostly SSDs these days, so this might not statistically significant.