From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755959AbZERMEe (ORCPT ); Mon, 18 May 2009 08:04:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754716AbZERMEY (ORCPT ); Mon, 18 May 2009 08:04:24 -0400 Received: from web26106.mail.ukl.yahoo.com ([217.146.182.147]:40534 "HELO web26106.mail.ukl.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754515AbZERMEY convert rfc822-to-8bit (ORCPT ); Mon, 18 May 2009 08:04:24 -0400 X-Greylist: delayed 400 seconds by postgrey-1.27 at vger.kernel.org; Mon, 18 May 2009 08:04:23 EDT DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=pL4ifYn5l2n/qBpfbtVy5NHFHpUwuEkBSHCgw4ZAq7qa+GLJaIZaDYBID5557XpqC6ArN14mw8pE0p/Olg3CXTGp64aQKUVOPQRe0PYl0I9fvNvz5zPvM6JamsPTHmYxMyy+HyjDkDoAOePRg+cGeGg1A3dNhS8SToq9zAlom2w=; Message-ID: <865071.76281.qm@web26106.mail.ukl.yahoo.com> X-YMail-OSG: 7r9FWDgVM1kgt6wVAfQvT6f3.uh3E3uJtkGhb4b05AagKZ9EnYIKk92ST1IRQlOyvx_jFIj1OQCEJhh91hZdrb2Sbu7bUvFC8Y2ym4AWXXowsE7ja9i_yYTxKQQKwj1vp9D7Yn4s_2uOiCM8HBnKq6r63cq7BEMkOa7GtKn0v7oX8jUwEIbR6YQklqq65wt2.LFWzAX3V307dh1VxdtmlTAFEkpmS545hjmJV3RcA5DXan9qdGYK8MYd2NLfOoFwWf_WQVy1_0ntJ_Clh94q7bKWAub.K3cwt9Zfq_uFvQ18Fc3BdbAz8Gi0.fJkoJoXGUG5Mm0cv9W3S4EZhxn5v2dq X-Mailer: YahooMailClassic/5.3.9 YahooMailWebService/0.7.289.10 Date: Mon, 18 May 2009 11:57:43 +0000 (GMT) From: John Zupfel Subject: Houston, we have a problem: big file copying, USB, external disks To: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Are recent kernels (since somewhere around 2.6.27 - 2.6.28) choking on big file copying? https://bugs.launchpad.net/ubuntu/+source/gvfs/+bug/197762?comments=all Quoting the latest post: > No, it's not Ubuntu specific and Canonical didn't cause it. > > Right now I'm copying between two SATA drives, connected to my PC via > eSATA. So far a lousy 600MB has been copied and I'm already down to > 5MB/s and falling. > > Here is what I know about the problem: > > It affects ALL hardware. > > It affects ALL file copying connections to varying degrees: USB, > network, SATA/eSATA. > > In some instances, it also affects multitasking, all but locking the > computer up despite little to no CPU use in System Monitor. > > There are no error logs, messages or anything else that occur when the > problem is happening. > > In my experience, if you test for the problem and nothing seems to be > wrong, then that's because you aren't copying enough data, you don't > know how fast your hardware should be copying files, or you are lucky > enough to only be subtly affected that time. Try copying more multi- > gigabytes of data, several times and see if you can't get wildly > different durations for the same data size. As I state above, all > hardware I have tested is affected to varying degrees, some hardware > shows minor performance degradation over time, some hardware is all but > useless for file copying. > > If you ask me, it's either the scheduler (GUI lockups with no CPU usage > makes me think this) or whatever performs the actual file copy process. > It's definitely not a USB problem because it affects network copying > too.