From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mondschein.lichtvoll.de ([194.150.191.11]:57198 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751527Ab2HCSpW convert rfc822-to-8bit (ORCPT ); Fri, 3 Aug 2012 14:45:22 -0400 From: Martin Steigerwald To: Marc MERLIN Subject: Re: How can btrfs take 23sec to stat 23K files from an SSD? Date: Fri, 3 Aug 2012 20:45:19 +0200 Cc: linux-btrfs@vger.kernel.org, "Fajar A. Nugraha" References: <20120722185848.GA10089@merlins.org> <201208022321.51795.Martin@lichtvoll.de> <20120802214946.GB1834@merlins.org> (sfid-20120803_140753_131575_3A20DA47) In-Reply-To: <20120802214946.GB1834@merlins.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Message-Id: <201208032045.19803.Martin@lichtvoll.de> Sender: linux-btrfs-owner@vger.kernel.org List-ID: Am Donnerstag, 2. August 2012 schrieb Marc MERLIN: > > > I'll try plugging this SSD in a totally different PC and see what > > > happens. This may say if it's an AHCI/intel sata driver problem. > > > > > > > > Seems we will continue until someone starts to complain here. Maybe > > another list will be more approbiate? But then this thread has it all > > in one ;). Adding a CC with some introductory note might be > > approbiate. Its your problem, so you decide ;). I´d suggest the fio > > mailing list, there are other performance people how may want to > > chime in. > > > Actually you know the lists and people involved more than me. I'd be > happy if you added a Cc to another list you think is best, and we can > move there. I have no more ideas for the moment. I suggest you to try the fio mailing list at fio lalala vger.kernel.org. I currently have no ideas for other lists. I bet there is some block layer / libata / scsi list that might match. Just browse the lists from kernel.org and pick the one that sounds most suitable for me¹. Probably fsdevel but since the thing does not seem to be filesystem related beside some alignment effect (stripe in Ext4). Hmmm, probably linux-scsi, but look there first, whether block layer and libata related things are discussed there. I would start a new thread. Tell the problem, tell in summary what you have tried and the outcome of that was and ask for advice. Add a link to the original thread here. (It might be a good idea to have one more post here with a link to the new thread so that other curious people can follow there – in case there are any. Otherwise I would end it on this thread. The thread view already looks ridiculous in KMail here ;-) And put me on Cc ;). I´d really like to know whats going on here. As written I have no more ideas right now. It seems to be getting to low level for me. [1] http://vger.kernel.org/vger-lists.html Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7