Learn Linux Blog - Latest Comments

Re: Resolved Intel e1000e driver bug on 82574L Ethernet controller causing network blipping

Kyrian — Wed, 02 Oct 2013 19:19:15 -0000

Using Debian, elrepo is not an option (unless I use tools to convert to .deb). Thus far I've had "success" (I await being disproven by ifconfig in due course!) by compiling the module with "CFLAGS_EXTRA=-DE1000E_NO_NAPI make" (with bash as a shell, other docs suggest different incantations, but that didn't work, so make sure environment variable passing for your shell is done correctly!) for version 2.5.4-NAPI, and using an rx queue length of 4096 with rx pause off. I lose track of what exactly fixed it, but using different IntMode values to force each of eth0 and eth1 onto different interrupt "types" combined with the aforementioned seemed to be finally what got it nailed. I think it's the *different types* that's the key here, not what type you use, so make sure you comma-separate the list so each ethX interface uses a different type to avoid clashes (/proc/interrupts btw!).

One weird thing I noticed was that the number of dropped packets concurred directly with the number of dropped packets was exactly the sum of the xon/xoff flow control errors (which you can get with eg "/sbin/ethtool -S ethX | grep xo") even if the flow control stuff concurred with what was happening on the switch port, and (although I could be wrong on this) the rx pause was turned off!
The above is not to say that the configuration options and ethtool tweaks applied wouldn't have worked with the "in situ" driver version, though, so maybe try those first before forcing a module version upgrade and rebooting.

Frankly, this is pot luck, because these drivers seem so broken in so many different ways that work for different people and I think the vendor should probably up their game with documentation (which to their credit they do seem to have done in the README for the 2.5.4 driver, but that's no good to many people if Google can't find it, or you can't hit the right keyword combinations to find it...).

Re: Use xming, xshell to display linux gui to windows desktop (x11 forwarding)

Abhinav — Mon, 03 Jun 2013 06:59:04 -0000

I am creating a GUI in java swing on linux client machine which creates a ssh connection to the remote linux server on button click and execute a command "java -jar GUITest.jar", But i am not able to see the GUI of GUITest.jar. I am using Jsch library for SSH connection.
Same thing i am able to do in windows,i have used same java code and there i am running Xming server which opens GUI automatically on client machine but the application actual runs on server. please provide me the solution.

Re: Resolved Intel e1000e driver bug on 82574L Ethernet controller causing network blipping

Qf Yang — Wed, 29 May 2013 01:41:59 -0000

Intel website (http://downloadmirror.intel... says there is a option IntMode can be use in /etc/modprobe.conf :
IntMode
Valid Range: 0-2 (0=legacy, 1=MSI, 2=MSI-X)
Default Value: 2

Maybe this is a easy way to solve the issue:
put lines below to /etc/modprobe.d/myoption.conf
alias eth0 e1000e
alias eth1 e1000e
options e1000e IntMode=0,0

Re: EMC BCV database backup howto

Todd — Thu, 02 May 2013 22:24:04 -0000

Wanted to say thanks. This was most useful. I do not directly work with the EMC storage, but it does house the DASD for the IBM Z/os Server that I maintenance. I knew BCV notifications were my snapshots but this was good for what I needed.

Re: resolved linux check qlogic/emulex hba firmware version and model name type howto

Arunabh — Thu, 11 Apr 2013 16:17:38 -0000

Thanks a lot for the script. I've emulex HBA card installed in my server. Please refer the below details.

# lspci|grep -i fibre
0a:00.0 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter (rev 02)
0a:00.1 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter (rev 02)
0c:00.0 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter (rev 02)
0c:00.1 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter (rev 02)

I've just pasted the script and ran it, it gives below errors on the screen. Please suggest on this.

# sh hbainfo.sh
hbainfo.sh: line 4: Model: command not found
LPe11002-E
hbainfo.sh: line 6: Firmware: command not found
2.80A4 (Z2F2.80A4)
hbainfo.sh: line 4: Model: command not found
LPe11002-E
hbainfo.sh: line 6: Firmware: command not found
2.80A4 (Z2F2.80A4)
hbainfo.sh: line 4: Model: command not found
LPe11002-E
hbainfo.sh: line 6: Firmware: command not found
2.80A4 (Z2F2.80A4)
hbainfo.sh: line 4: Model: command not found
LPe11002-E
hbainfo.sh: line 6: Firmware: command not found
2.80A4 (Z2F2.80A4)

Re: mkfile/dd to create a file with specific size

kekkonj — Sun, 31 Mar 2013 07:08:27 -0000

Remove from the script all the html/xml tags after the last "exit 0". They were not supposed to appear there, but copying + pasting onto the website did cause this kind garbled contents to appear there.

Re: mkfile/dd to create a file with specific size

kekkonj — Sun, 31 Mar 2013 07:02:34 -0000

You can also use the following script with almost all different Linux distros to emulate "mkfile". Put the script somewhere within the search path and give it a executable rights with the command chmod 755 mkfile. The syntax of the mkfile is then "mkfile <size in="" k,="" m,="" or="" g=""> <filename>

#!/bin/bash
#
# This script makes the Solaris mkfile command to live in Linux
#
# USAGE: mkfile <filesize k,m,g=""> <filename> with an example # mkfile 10m filename
opt1=`echo $1`
value=`echo $1|sed -e "s/^.*$.$$/\1/"`
size=`echo "${opt1::${#opt1}-1}"`
gi=`echo "$size * 1000"|bc -l`
count=`echo $opt1|grep '\.'|wc -m`
echo $opt1|grep '\.' 1> /dev/null 2>&1
if [ $? = 0 ]; then
if [ "$count" -ge 6 ]; then
echo -e "Please, do not give more decimals than one after . (period)."
echo -e "Use m for Mega Bytes instead of g for Giga Bytes in exact cases."
exit 0
fi
giga=`echo "${gi::${#gi}-2}"`
else
giga=`echo $gi`
fi
#
case "$value" in
k|K)
dd if=/dev/zero of=$2 bs=1k count=$size 1> /dev/null 2>&1
;;
m|M)
dd if=/dev/zero of=$2 bs=1024k count=$size 1> /dev/null 2>&1
;;
g|G)
dd if=/dev/zero of=$2 bs=1024k count=$giga 1> /dev/null 2>&1
;;
*)
;;
esac
exit 0

Re: resolved – tcl error list element in quotes followed by “” instead of space while executing tcl

yogev ch — Sat, 02 Mar 2013 11:16:13 -0000

I get the same error, but on the following command:

while {[gets $logfile_fd line] >= 0} {
...do something with $line...
}

How can I resolve this ?

for something like 20 lines of the $logfile_fd, everything works fine (as it should), but on the 21'th line, there is a phrase:

")\nindexRecordsRead:", that ruins everything...

The full error I get is: "list element in quotes followed by ")\nindexRecordsRead:" instead of space"

Is there any solution for this one ?

Thanks...

Re: Use xming, xshell to display linux gui to windows desktop (x11 forwarding)

HS — Thu, 21 Feb 2013 20:52:47 -0000

Amazing.. Worked like a charm !! Cheers..

Re: Install curl utility on solaris

Richard Santillán Echevarría — Tue, 15 Jan 2013 12:25:32 -0000

In the first point also works with command "date --set". Only change time with it and will work the source compilation.

Re: Support doxer.org

Andy — Tue, 08 Jan 2013 09:58:51 -0000

Thanks Patrick, I'm happy to share ideas with GNU guys and wish my articles can give you guys a hand.

Re: Support doxer.org

Patrick — Tue, 08 Jan 2013 09:56:46 -0000

Ok pal, I've to say that your site is a great one and ads are reasonably arranged, they won't hinder reading. Thanks a lot for keeping updates to this blog.

Re: Oracle views – Static Data Dictionary Views & Dynamic Performance Views

ynehs — Wed, 02 Jan 2013 04:32:47 -0000

Thanks for posting this.

Re: Steps to create new volume of VxVM under solaris

armand — Tue, 04 Dec 2012 10:43:50 -0000

thanks for the simple WI

Re: EMC BCV database backup howto

Vishnu — Fri, 02 Nov 2012 10:35:11 -0000

It is very use full

Re: Nagios Check_nrpe/check_disk with error message DISK CRITICAL – /apps/yourxxx is not accessible: Permission denied

FrustratedNagiosAdmin — Tue, 23 Oct 2012 12:33:31 -0000

what if the local nagios user (after doing su -s /bin/bash nrpe) can also run the command, its only the remote check that gives the permissions error?

Re: Using zpool clear to resolve zpool “cannot open” issue

Tony — Wed, 19 Sep 2012 14:01:32 -0000

Thank you for your post, I was going crazy trying to fix this problem after a brown out.
After I found your post, I have my zone running in no time. Thank you again.

Re: Resolved – VxVM vxconfigd ERROR V-5-1-0 Segmentation violation – core dumped

doxerorg — Mon, 10 Sep 2012 18:44:11 -0000

you're welcome! Good luck!

Re: resolved: zoneadm list segmentation fault core dumped

Lorenzo — Mon, 10 Sep 2012 10:16:13 -0000

Thank Dude! It's Work! :)

Re: Resolved Intel e1000e driver bug on 82574L Ethernet controller causing network blipping

Ilya Dorfman — Fri, 07 Sep 2012 21:38:21 -0000

Given that this fix has been posted on April 1 - could someone confirm that it actually is the right way to fix the problem and that it actually worked. I am having an issue like this too and would like a confirmation from someone...

Re: Use xming, xshell to display linux gui to windows desktop (x11 forwarding)

Jayesh — Mon, 27 Aug 2012 06:13:20 -0000

I did this, everything works fine except clipboard.
I cannot copy text from xming (say gvim opened in xming) to xshell window, but I can copy it to any other windows application like msword. Please let me know how to fix this.

Re: Resolved – VxVM vxconfigd ERROR V-5-1-0 Segmentation violation – core dumped

andyhan.net — Mon, 20 Aug 2012 21:32:54 -0000

Thanks mate. resolved an issue during a change.

Re: Resolved Intel e1000e driver bug on 82574L Ethernet controller causing network blipping

Henrique Madureira — Thu, 16 Aug 2012 11:45:35 -0000

Hello all, this may be related to something I'm experiencing. I have a Debian Lenny install and the same occurs all the time to me. My server runs a Clonezilla-SE and e1000 always crashes randomly, but never while sending the multicast over the network. Also, nothing appears on the va/log/messages but a "e1000 PCI INT A disabled". I'm gonna try to re-install the NIC driver and see what I get.

Re: Resolved Intel e1000e driver bug on 82574L Ethernet controller causing network blipping

Mark — Fri, 27 Jul 2012 12:23:52 -0000

Thanks a LOT for taking the time to document this! We ran into this problem on our new squid proxy servers but the problem didnt show up until it was under load (we had run it for months under a light load with no problems). Fortunately, one of the NIC's failed yesterday (under no load) except with some errors in /var/log/messsages this time (unlike before). After searching a bit on the error messages, I started running across comments by others of similar problems and eventually found this link with detailed instructions on how to fix bug. I went ahead and made the changes and will now decide how much user traffic to send thru to see if the problem re-occurs. Thanks again!!

Re: use ldapmodify to change ldap userpassword

Ping — Mon, 23 Jul 2012 10:32:45 -0000

Hi,

I am able to change the password of a user with ldapmodify, I see the change in the ldapsearch output. but that user is unable to login with either changed password or the old password.
The users who have not changed the password are able to login with ldap authentication. But not the ones whose password was changed either by ldapmodify or ldappasswd.
Any idea what is happening. Please help

thanks

Ping