From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755867Ab1HRMWr (ORCPT ); Thu, 18 Aug 2011 08:22:47 -0400 Received: from lucidpixels.com ([72.73.18.11]:59709 "EHLO lucidpixels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755786Ab1HRMWp (ORCPT ); Thu, 18 Aug 2011 08:22:45 -0400 Date: Thu, 18 Aug 2011 08:22:44 -0400 (EDT) From: Justin Piszcz To: "J. R. Okajima" cc: Jeff Layton , Jesper Juhl , linux-kernel@vger.kernel.org, Alan Piszcz , Steve French , linux-cifs@vger.kernel.org Subject: Re: Kernel 3.0: Instant kernel crash when mounting CIFS (also crashes with linux-3.1-rc2 In-Reply-To: Message-ID: References: <20110815064734.403b630f@corrin.poochiereds.net> <3300.1313637592@jrobl> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 18 Aug 2011, Justin Piszcz wrote: > > > On Thu, 18 Aug 2011, Justin Piszcz wrote: > >> >> >> On Thu, 18 Aug 2011, J. R. Okajima wrote: >> >>> >>> Justin Piszcz: >>>> Does anyone know if any kernel supports CIFS w/out crashing? I'd like to >>>> backup some CIFS shares, thanks. >>>> >>>> >>>> mount -t cifs //w2/x /mnt -o user=user,pass=pass >>>> >>>> [ 881.388836] CIFS VFS: cifs_mount failed w/return code = -22 >>> ::: >>> >>> Since it failed mounting, this patch will help you. Although the patch >>> will fix one bug, there still may exist another problem. >>> >>> http://marc.info/?l=linux-cifs&m=131345112022031&w=2 >> >> Hi, >> >> Latest patch (this one) applied to linux-3.1-rc2 works, at least it mounted >> this time and did not instantly crash the kernel! >> >> I also tried the hostname again (and it did not crash the kernel, but it >> failed to mount). >> >> Used the IP and it mounted successfully: >> //10.0.0.11/x 28T 5.0T 23T 19% /mnt >> //10.0.0.11/y 19T 1.2T 18T 7% /mnt2 >> >> It has not crashed yet (which is good), I'll apply this patch to my >> production machine and test taking backups of this data and let you know >> if it crashes again, thanks! >> >> Justin. > > > Hello, > > It is working but very slowly: > > Device eth6 [10.0.1.2] (1/1): > ================================================================================ > Incoming: Outgoing: > Curr: 37.60 MByte/s Curr: 0.44 MByte/s > Avg: 4.98 MByte/s Avg: 0.09 MByte/s > Min: 0.00 MByte/s Min: 0.00 MByte/s > Max: 40.79 MByte/s Max: 0.48 MByte/s > Ttl: 1.45 GByte Ttl: 26.77 MByte > > Over 10GbE the other direction (Linux -> Windows (via Samba)) I get 500MiB/s, > is CIFS slow? > > I'll look into options to tweak the speed but this is very poor speed when > you have to transfer 5-10TB. However, it is not crashing anymore, so any > speed is better than that :) > > Justin. Hi, Mounting with: rw,uid=1000,gid=100,mode=0644,rsize=130048,wsize=1048576,credentials=/root/.cifs Same speed: Device eth6 [10.0.1.2] (1/1): ================================================================================ Incoming: Outgoing: Curr: 32.42 MByte/s Curr: 0.38 MByte/s Avg: 30.72 MByte/s Avg: 0.39 MByte/s Min: 0.00 MByte/s Min: 0.00 MByte/s Max: 43.64 MByte/s Max: 0.59 MByte/s Ttl: 20.15 GByte Ttl: 261.03 MByte Thoughts? Has anyone achieved > 30-40MB/s with CIFS? This is a 10GbE link (and yes JUMBO frames are enabled on both sides, and again, samba from Linux->Windows = 500MB/s) Justin.