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vmxnet3 patch for CentOS6 kernel?
by Matti Aarnio 26 Aug '11

26 Aug '11

Hi, Could CentOS kernel keepers apply following patch on current kernel? http://patchwork.ozlabs.org/patch/95785/ (Current as: 2.6.32-71.29.1.el6.x86_64) With the patch applied, and a ".local" kernel built, I get 30% higher throughput with vmxnet3 in my IP routing node, than when using e1000 "card" at the same. Without the patch, the TCP flow over vmxnet3 driver on a _router_ node is abysmally slow. I am running a bunch of CentOS servers on VMware ESXi 4.1U1 hosts with multiple of VLANs. The best network performance is obtainable with vmxnet3 network driver in normal case. This driver includes so called LRO optimization, which boosts TCP flow network performance on end-nodes, but kills it on routers, thus the LRO mode needs to be disabled on a host doing routing in between network interfaces. The issue is a bug in vmxnet3 driver, which is not able to disable LRO mode when the kernel is telling the driver to do so. The patch for it applies on 2.6.32 kernels as well as 2.6.38/39 where it got applied to baseline. Could this be applied on stock CentOS kernel so that I could return on un-customized kernel use? Best Regards, Matti Aarnio PS: bugs.centos.org is apparently unable to send email out, otherwise I would have written this as a bug report... <http://patchwork.ozlabs.org/patch/95785/>

4 7

CentOS 6.0 and freenx
by Helmut Drodofsky 26 Aug '11

26 Aug '11

Hi, http://wiki.centos.org/HowTos/FreeNX says: NX and FreeNX are only available for Centos 4 and 5 Alternative? Thanks in advance for ideas. Helmut

9 17

CentOS 6: add icon to desktop
by Michael D. Berger 26 Aug '11

26 Aug '11

On my old CentOS 5 KDE, if I add a link to ~/Desktop, it appears on the desktop as an icon. But on my new CentOS 6 KDE, this does not work. How can I make it work? Thanks, Mike.

3 2

Centos 6: howto install and run KDE
by Michael D. Berger 26 Aug '11

26 Aug '11

On my laptop, I have not been able to get KDE to run; I always get gnome. I installed selecting KDE, and I tried yum groupinstall, which appeared to work, but I still get gnome running. BTW, I boot to level 3, and run startx. Thanks for your suggestions. Mike.

4 3

Problems with kickstart installation into a Virtualbox
by anax 26 Aug '11

26 Aug '11

Hi listers i tried to kickstart-install CentOS 6.0 64 in a Virtualbox (Virtualbox Version 4.12). I used a local CDROM with the net-install ISO on it to boot from. The ISO distribution file was provided on a server in the LAN as was the kickstart file. When starting the installation i aded the following to the kernel line of the grub menu: ks=http://install.mydomain.com/ks/centos.6.64.cfg After i had corrected some errors in the kickstart file, the installation started as expected. But it did not terminate as expected: after installing 198 of 671 packages, the installation halted with an error (i.e. after installing the package libutempter). In order to see what the problem was, i restarted from the CDROM in recovery mode, and after going into the half-way installed system, i saw in the anaconda log that about three quarters of the post-installation scripts of the packages had returned a warning. The warning code was 255. But the post-installation script of the package libutempter had returned an error with code 255, whereupon the installation stopped. I thought, OK, we will work around the libutempter package by selecting other program-groups in the kickstart-file. But i had no luck: the installation stopped then after the package MAKEDEV. Then i left off kickstart-installation and did a standard installation booting from the CDROM and getting the default packages from the server in the LAN. This worked fine. ----- When it came to test the installed packages i was always lucky except with the package fuse (fuse-2.8.3-1.el6.x86_64) which contains the binary /usr/bin/fusermount. This binary was installed without execute permission for everybody, so it could be invoked only by the userid root and members of the group fuse, which is not, what i had expected. suomi

4 6

updating 5.6 but not going to 6.0
by Mike VanHorn 26 Aug '11

26 Aug '11

I'm confused as to how to install updates for CentOS 5.6 without upgrading to 6.0. When I do a "yum check-updates", the new *-release packages for 6.0 are listed, so I don't think I want to do a simply "yum update". Is there a way to update 5.6 without going to 6.0? --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanhorn(a)wright.edu http://www.engineering.wright.edu/~mvanhorn/

3 2

Re: [CentOS] Cent OS 6 freezing up
by m.roth＠5-cent.us 26 Aug '11

26 Aug '11

John Doe wrote: > From: Jimmy Bradley <bmobile40(a)ocellaris.net> > >> I've been out of pocket for a while, so don't shoot me, if this has already been brought up. I'm having a problem with my desktop freezing up, and I'm running Cent OS 6. It seems to happen while I'm running firefox. I'm not sure if it's firefox, or the OS that's locking up. When it freezes up, nothing will respond, so I'm inclined to think it's the OS that's freezing up. Has anyone else been having this problem? > > I've had "many" temporary whole desktop freezes due to Firefox being overloaded. > Not sure who is the culprit... Gnome? Xorg? NVidia driver? > Guess nothing in the bios or lnux logs? > You could try another browser for a while and see if there are no more freezes... I wouldn't say "many", but yes, it does. It also does things like slowing to a crawl, and then there's when I allow something via noscript, and refresh the page... and then have to refresh and restart the streaming media that's running in another tab. mark

1 0

perl-Sys-Filesystem on 6.0
by m.roth＠5-cent.us 26 Aug '11

26 Aug '11

I'm trying to install a number of perl modules, and yum gives up with perl-Sys-Filesystem, because it has a dependency of perl(:MODULE_COMPAT_5.8.8) I've tried seeing what provides it, and yum says nothing. I also see, googling, that there was a problem thread on this list in '08 with the same dependency. Anyone have a clue, or workaround? mark

2 1

svnserve and SysVinit
by Andrew Dorozhkin 26 Aug '11

26 Aug '11

Hello there and SFME. Since el6 subversion package doesn't contain traditional SysV demonization script anymore I wonder how it is supposed to run svnserve from now on. 1) Should one write init script to be managed with service(8) on his own? 2) Or launch svnserve on demand via (x)inetd? 3) Or put svnserve command line in some rc-script? 4) Or maybe is ra_svn deployment scheme not supported in el6 at all and one should stick with Apache/mod_dav_svn? Thanks d.a.

3 4

XFCE missing applets: weather and xfapplet
by wwp 26 Aug '11

26 Aug '11

Hello there, I'm just looking for two XFCE applets I'm missing: the weather and xfapplet (the one to load GNOME applets). Couldn't find them in repositories I know of. Any hint or do I have to either wait or compile their sources by hand? Thanks in advance for any XFCE help! Regards, -- wwp

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