Glibc question - 'RT using linux kernel aio'

Hello all,
Can anyone give some info about one of the glibc add-ons called 'RT using linux kernel aio'
I've googled alot without success.
Here is libc output in default ArchLinux install
GNU C Library stable release version 2.16, by Roland McGrath et al.
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.7.1 20120721 (prerelease).
Compiled on a Linux 3.4.6 system on 2012-07-24.
Available extensions:
crypt add-on version 2.1 by Michael Glad and others
GNU Libidn by Simon Josefsson
Native POSIX Threads Library by Ulrich Drepper et al
BIND-8.2.3-T5B
libc ABIs: UNIQUE IFUNC
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.
In Fedora (and others) there is one additional glibc add-on listed:
GNU C Library stable release version 2.15, by Roland McGrath et al.
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.7.0 20120507 (Red Hat 4.7.0-5).
Compiled on a Linux 3.4.4 system on 2012-07-03.
Available extensions:
Support for some architectures added on, not maintained in glibc core.
The C stubs add-on version 2.1.2.
crypt add-on version 2.1 by Michael Glad and others
GNU Libidn by Simon Josefsson
Native POSIX Threads Library by Ulrich Drepper et al
BIND-8.2.3-T5B
>> RT using linux kernel aio <<
libc ABIs: UNIQUE IFUNC
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.
Any chances we can have this add-on installed ? Or in other words is there any good reasons not to have this add-on ?
Regards,

ZENworks Linux Management is what used to be called Red Carpet - it
does not provide access for other client operating systems. Please
could you repost this in the community chat forum, since it will not
reference any Novell products.
Shaun Pond
Novell Support Connection SysOp

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Safe to remove linux kernel when using linux-lts kernel?

I'm using the `linux-lts` kernel on my work machine (less reboots after updates); I know in theory it should be safe to remove the normal `linux` kernel (and it's dependencies) but does anyone know if it is safe in practice? Nothing that assumes there will always be a `linux` package because without it there couldn't be a running system?

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jonjac wrote:
The OSS document that you mentioned lists the latest kernels as of September 2010, and describes the changes made.
Why are you afraid that you might not be in compliance?
Because I don't know enough about what I'm doing to be able to confirm that the specific issue has been addressed.
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Part of what leaves me a bit uncomfortable is the statement in my directive that the directive states
=========
Affected Software/Patch(es):
Linux Kernel 2.6.X releases prior to 20 September 2010 *
===========================
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If I understand correctly, all you need to do is install the latest kernel update of OEL, because that's the distribution you are running.
What repositories does your system use? Which kernel updates are automatically available?
Here's a complete accounting of what I've done ...
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Loaded plugins: security
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Setting up Install Process
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=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2010.10.20 16:21:01 =~=~=~=~=~=~=~=~=~=~=~=
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<snip>
=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2010.10.21 10:44:59 =~=~=~=~=~=~=~=~=~=~=~=
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Enterprise Linux Enterprise Linux Server release 5.5 (Carthage)
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How to use Corecrypto kernel module

Hi all,
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[Solved] Worth buying the book? Linux Kernel Internals

Dear Arch Community,
Yesterday I succesfully installed arch on my old laptop for testing purposes, and it's been great.
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Last edited by MatRoo (2013-03-23 12:59:37)

weirddan455 wrote:
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I know i dont have to, but I'd like to know what's happening under the hood when I'm doing my stuff.
The original questions stays :-) Is it worth buying the book if I want to know the internals, since the book only covers 2.6, and we're a tad past version 2.6.
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Dear community,
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Dear community,
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Linux: Kernel Preemption, To Enable Or Not To Enable

The default 2.6.4 Arch Linux kernel .config has 'CONFIG_PREEMPT=y'.
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The text of the article is repeated here:
"A recent bug report on the lkml complained of significant performance degradation from enabling CONFIG_PREEMPT, kernel preemption. 2.6 kernel maintainer Andrew Morton [interview] pointed out that such degradation from enabling kernel preemption is not normal, instead likely from it triggering a bug. However, an interesting conversation on the merits of kernel preemption followed.
Andrea Arcangeli, author of the 2.4 virtual memory subsystem, bluntly suggested, "keep preempt turned off always, it's useless. Preempt just wastes cpu with tons of branches in fast paths that should take one cycle instead." Andrew Morton noted, "preempt is overrated." However, he went on to point out that kernel preemption has been very useful in detecting locking bugs. He added, "it has been demonstrated that preempt improves the average latency. But not worst-case, because those paths tend to be under spinlock."
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I like preemption. it the "democracy" heaven of processes and threads. This post was interesting, but the point is this bug..?
if the bug is found, who can say that preemption in the kernel is not a good idea?
thanks for posting though ;P

How to use Linux legally for business in the US

Hello.
I am doing some research on software patents and how they inhibit businesses in the US from using FOSS.
My question is, basically, what would a business have to do in the US to use Linux in place of Windows/Mac and make sure they are not violating software patents? Violating these patents (for example, including an illegal H.264 codec in a company's system image so that video can be played by employees) present a serious liability to US businesses and could potentially discourage them from abandoning a proprietary OS for a free one.
One portion (of many) of this discussion I do not understand is how does one guarantee their system is clean of illegal codecs? For example, assume if one used his/her package manager to delete any codec-related packages he/she could find. If this person used a web browser to navigate to a website that included in-page H.264 videos or sound effects encoded using MP3, would this content merely not function (meaning, the person would be legally safe but unable to play the content)? Or do web browsers have these illegal codecs built in? I don't understand how website programming works enough to know the answer to this particular question.
I would appreciate any insight on this issue (and/or any thoughts you might have on this subject).
Thank you for your time.

See distro's to avoid here if you are in the US:
http://www.gnu.org/distros/common-distros.html
And, linked from that page, see ones that should be safer:
http://www.gnu.org/distros/free-distros.html
With Parbola:
https://parabolagnulinux.org/
Being Free and based on Arch.
Now, the problem, completely free is very picky about the hardware it will run on so you will want to procure hardware specifically built to run under a Free system without issues. Licensed distributables you can get away with using, for example: Adobe Flash Player. Just accept the license agreement and you should be good to go. The minefield is that somewhere in even the Free code there could be a patent lying in wait. Something that someone in the US patented and the Free systems programmers were not aware of it. This is an issue in the US because commercial Operating Systems such as Windows will indemnify their users against patent infringement. On Free systems however you, the business using them, could end up being on the hook for significant damages.
The reason a completely Free system is very picky about what hardware it will run on is because all those binary blobs in common Linux distributions contain code that just makes stuff work. Without that you have to make absolutely sure that what you have will work with just Free software.
See:
http://www.gnu.org/philosophy/fighting- … tents.html
Last edited by headkase (2013-02-21 01:25:52)

Unable to run PL/SQL Cartridge (OAS 4.0.8.1, Redhat Linux Kernel 2.2, Oracle 8.1.5)

PL/SQL Cartridge server refuses to come up.
Config:
=======
OAS 4.0.8.1 on Redhat Linux Kernel 2.2
Oracle 8.1.5 on Windows NT
Remote access to the database using connect string
The Linux m/c and NT m/c have recommended system requirements and domain registering. I could invoke the procedure from SQL plus and view the HTML contents using owa_util.showpage. Also, I could install PL/SQL Web Toolkit using the same DAD. But Cartridge server just refuses to come up. If anyone has a solution for this, it would be a great help!!
P.S: Attached below is wrb.log
Thanks,
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Wrb Log Contents
================
02-11-2000 17:27:49 746919 devlinux `Broker` 2231 1 0x10fff `OWS-04764: Unable to bring up cartridge server, type icsawebsite, at devlinux. `
02-11-2000 17:27:50 760451 devlinux `Dispatcher` 2361 1 0x2fff `OWS-04517: Error indicated by broker in getting cartridges of type icsawebsite/ckreddy. `
02-11-2000 17:27:50 860311 devlinux `Dispatcher` 2361 1 0x2fff `OWS-04512: Request 604CD69E9EBF-A5EC-E000-16FAA8C00954 has internal error due to Error 4511. `
02-11-2000 17:31:47 204347 devlinux `Broker` 2231 1 0x10fff `OWS-04764: Unable to bring up cartridge server, type icsawebsite, at devlinux. `

We had the same problem with the PL/SQL cartridge (OWS-04764 ...). We solved our problem with a new kernel. Its important that you have a kernel with symmetric multi-processing support (SMP) enabled, independent if you have a one or two processor machine.
I hope it will help you.
Best regards
Hans Hirter
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by icsanet:
PL/SQL Cartridge server refuses to come up.
Config:
=======
OAS 4.0.8.1 on Redhat Linux Kernel 2.2
Oracle 8.1.5 on Windows NT
Remote access to the database using connect string
The Linux m/c and NT m/c have recommended system requirements and domain registering. I could invoke the procedure from SQL plus and view the HTML contents using owa_util.showpage. Also, I could install PL/SQL Web Toolkit using the same DAD. But Cartridge server just refuses to come up. If anyone has a solution for this, it would be a great help!!
P.S: Attached below is wrb.log
Thanks,
Kiran
Wrb Log Contents
================
02-11-2000 17:27:49 746919 devlinux `Broker` 2231 1 0x10fff `OWS-04764: Unable to bring up cartridge server, type icsawebsite, at devlinux. `
02-11-2000 17:27:50 760451 devlinux `Dispatcher` 2361 1 0x2fff `OWS-04517: Error indicated by broker in getting cartridges of type icsawebsite/ckreddy. `
02-11-2000 17:27:50 860311 devlinux `Dispatcher` 2361 1 0x2fff `OWS-04512: Request 604CD69E9EBF-A5EC-E000-16FAA8C00954 has internal error due to Error 4511. `
02-11-2000 17:31:47 204347 devlinux `Broker` 2231 1 0x10fff `OWS-04764: Unable to bring up cartridge server, type icsawebsite, at devlinux. `<HR></BLOCKQUOTE>
null

Can I use LINUX Drivers in Solaris 10...

As a beginner, I have installed Solaris 10 version 08/07 onto my system. The motherboard is ASUS M2A-VM, with integrated graphics, network interface, audio, etc...
My audio and network interface are not working... The motherboard came with a cd which has windows drivers and additional software.
It also has linux drivers for:
Audio:
Core5
Core6
Linux
RHEL4
SUSE10
Other
realtek-linux-audiopack-4.05f
LAN
FreeBSD
Linux
SCO_OpenServer6
Unixware7.x
Chipset, and RAID!
Has anyone used any of these ASUS Linux drivers with Solaris...
If so what steps do I need to take to get them to work on my system! (I hate to ask, I know you all have better things to do) Maybe you can point me to a good book that explains how to go step by step...
My question is how do I get my NIC to work (What steps do I need to follow? the sound is not an issue, as, I can do with out that. Will any of the drivers mentioned above work?) thank you in advance for your answers...

Drivers are the "connective tissue" between the Operating System and the hardware. The connections from the drivers to the OS are not compatible between different operating systems, so no, you cannot use Linux drivers in Solaris.
If the OS is similar enough you can sometimes get away with it -- example, using Solaris 9 drivers in Solaris 10. But between completely different OSes? Won't work.

[SOLVED] Intel i7-3920XM Laptop CPU Linux Kernel Support

Recently, I purchased a laptop with an Intel i7-3920XM CPU, with the intention of utilizing it for scientific computing (I've become strongly interested in machine learning and artificial neural networks). Supposedly, the CPU has a variable clock speed of 2.90 -- 3.80 GHz, which would be great, but my kernel has throttled it to 1200MHz. I've tried both the cpufreq performance and userspace kernel modules (configured for performance), but the laptop stubbornly refuses to increase the clockspeed more than 1200MHz; I gave up on cpufreq and have uninstalled it. I've read some accounts that it is possible that the Linux kernel may not support my CPU yet --- does anybody know if that is the case? If it is not, can anybody point me to some literature describing how to un-throttle my CPU?
Last edited by deltaecho (2013-03-03 21:59:30)

runny6play wrote:
Meyithi wrote:
CPU frequency scaling is enabled by default, 1200MHz is fine for your processor as it's lowest frequency I have the 3960x and it's lowest frequency is 1200MHz as well.
You should just leave things as they are, if you can actually feel sluggish performance ( I don't with 6 cores @ 1200MHz) you can try this:- https://wiki.archlinux.org/index.php/Cp … erformance
Which will liven things up a bit at the cost of more battery juice.
EDIT/ compile something and whilst compiling
cat /proc/cpuinfo | grep MHz
to see what's reported at full load, but be aware it still may not report correctly due to turbo.
deltaecho wrote:Recently, I purchased a laptop with an Intel i7-3920XM CPU, with the intention of utilizing it for scientific computing (I've become strongly interested in machine learning and artificial neural networks). Supposedly, the CPU has a variable clock speed of 2.90 -- 3.80 GHz, which would be great, but my kernel has throttled it to 1200MHz. I've tried both the cpufreq performance and userspace kernel modules (configured for performance), but the laptop stubbornly refuses to increase the clockspeed more than 1200MHz; I gave up on cpufreq and have uninstalled it. I've read some accounts that it is possible that the Linux kernel may not support my CPU yet --- does anybody know if that is the case? If it is not, can anybody point me to some literature describing how to un-throttle my CPU?
I would agree with you if that was what the argument was about. I said the same thing about i7z as you just did, which is why i suggested it. as I understand it. your telling him 1.2 Ghz is an acceptable min and i would agree.How i am interperting his thread is 2.90 Ghz is his base. 3.80 Ghz is his max turbo. His CPU under 100 % load will not rise above 1.2 Ghz despite his stock clock is actually 2.90 Ghz. I can honestly say that this is the more likely story because my i7 did the same thing. on battery the max it would clock up to while runing /dev/urandom > /dev/null was 1.2 Ghz, while on Ac it would even turbo correctly. by unloading the module. my proccessor would clock as expected 800 mhz min 3.4 max turbo. and if you look he even used the performance governor to try to increase the clock
Ya, really the OP did not tell us 'how' he was reading his CPU speed....
deltaecho wrote:Recently, I purchased a laptop with an Intel i7-3920XM CPU, with the intention of utilizing it for scientific computing (I've become strongly interested in machine learning and artificial neural networks). Supposedly, the CPU has a variable clock speed of 2.90 -- 3.80 GHz, which would be great, but my kernel has throttled it to 1200MHz. I've tried both the cpufreq performance and userspace kernel modules (configured for performance), but the laptop stubbornly refuses to increase the clockspeed more than 1200MHz; I gave up on cpufreq and have uninstalled it. I've read some accounts that it is possible that the Linux kernel may not support my CPU yet --- does anybody know if that is the case? If it is not, can anybody point me to some literature describing how to un-throttle my CPU?
runny6play: If deltaecho is also seeing these same slow speeds in i7z then both you and he should look into your BIOS settings. For sure this would be a BIOS setting on a ThinkPad. "If on battery....slow... if on AC...fast".
Yes, it is the Linux Kernel that is no "Reporting" the correct speed. This is a known bug. However, there is nothing wrong with your CPU. It is running at High Speed.. Like this is the read out from my Kernel at idle...
[user@archtop:~]% sudo cat /proc/cpuinfo | grep MHz
[sudo] password for user:
cpu MHz : 1200.000
cpu MHz : 1200.000
cpu MHz : 2901.000
cpu MHz : 1200.000
The BEST way to test your CPU is, again i7z then compile some code... Like change the MAKEFLAGS="-j4" to -j1 for 1 thread, -j2 for 2 threads.... and so on. Compiling software will push your CPU all the way up.
When testing like this, i7z will show on 1 thread my CPU runs at 3.6GHz, on all 4 threads it runs at 3.4GHz, as it should. However, /proc/cpuinfo will only say wacky stuff like cpu MHz: 1200.000 cpu MHz: 2901.000
Last edited by hunterthomson (2012-11-26 09:28:13)

Nikal linux kernel 2.6.11.8 build fails

I am trying to install nidaqmxbase-1.5.0-f2, but the install keeps failing. I tried installing with a stock FC3 kernel, but the build has failed. I have since tried again after building a stock linux 2.6.11.8 kernel, but I get the same error message. The "warning: `packed' attribute ignored" in particular is one I haven't seen before.
Attachments:
nikal.log.txt ‏5 KB

myric wrote:
I am trying to install nidaqmxbase-1.5.0-f2, but the install keeps failing. I tried installing with a stock FC3 kernel, but the build has failed. I have since tried again after building a stock linux 2.6.11.8 kernel, but I get the same error message. The "warning: `packed' attribute ignored" in particular is one I haven't seen before.
I found the answer to my question in another thread:
http://forums.ni.com/ni/board/message?board.id=250&message.id=11286&requireLogin=False
It appears that NI-KAL doesn't like the 2.6.10+ linux kernel due to a change in the API. Both the kernels I tried were 2.6.10 plus.
Perhaps in the next release if nidaqmxbase the latest kernel will be supported? Hint, hint, pretty-please from a paying customer. ;-)

Is RDAC supported in Oracle Unbreakable Linux kernel 2.6.32-100.0.19.el5?

Dear,
Is RDAC supported in Oracle Unbreakable Linux Kernel 2.6.32-100.0.19.el5?
If supported, please point to the download link.
We require this in order to plan for the OEL 5.5 kernel upgrade to ULK and to connect SUN SAN storage array 6180.
Thanks,
...basha

From what I can gather you will need to compile the driver from source in order to use the RDAC driver with the UEK kernel. Chances are that it won't compile properly under the UEK kernel, which is more up to date than the RHEL kernel.
You will have to start the system from the supplied original RHEL kernel in order to use the binary IBM RDAC driver distribution. The following is available: http://www.lsi.com/sep/Pages/rdac/ds4000.aspx and http://www.lsi.com/sep/Pages/rdac/ds3000.aspx
You may however be able to use Multipath, which is build in also in the UEK kernel. To get the current supported configurations for IBM System Storage it is best to use the interoperability matrices located at http://www-03.ibm.com/systems/storage/product/interop.html. You can use the link to the "System Storage Interoperation Center (SSIC)" to query your specific configuration (http://www-03.ibm.com/systems/support/storage/ssic/interoperability.wss)
Edited by: Dude on Feb 12, 2012 2:17 PM

Listing of All Linux Kernel Modules

I've been poking around, trying to find a list of all available Linux kernel Modules.. Does anyone know where such a list may be located?
Basically looking for something that gives the module name (like - nvidia) and then a quick explanation or description of it (like - nVidia Video Card Module).
If I find something, I'll stick it on the wiki; but thought someone may have already run across it somewhere.
thanks!!

This will provide a list of modules
modprobe -c | less
An example output portion will look like this:
alias pci:v00001133d0000E00Bsv*sd*bc*sc*i* hisax
alias pci:v00001133d0000E005sv*sd*bc*sc*i* hisax
alias pci:v00001133d0000E004sv*sd*bc*sc*i* hisax
alias pci:v00001133d0000E002sv*sd*bc*sc*i* hisax
alias pci:v00001244d00000A00sv*sd*bc*sc*i* hisax
alias pcmcia:m*c*f*fn*pfn*paD79E0B84pb21D083AEpc*pd* sedlbauer_cs
alias pcmcia:m*c*f*fn*pfn*pa81FB79F5pbE4E9BC12pcB391AB4Cpd* sedlbauer_cs
alias pcmcia:m*c*f*fn*pfn*pa81FB79F5pbE4E9BC12pc8DB143FEpd* sedlbauer_cs
To get information on what each module does
yum -y install kernel-doc --This will install the kernel documentation to /usr/share/doc/kernel-doc-*/Documentation (* is the version of the kernel you are using)
If we wanted to get info on the 'hisax' module
cd /usr/share/doc/kernel-doc-*/Documentation
grep -R -i hisax * --This will list any docs on the module, in this case will find that it is a driver for a Siemens ISDN card

Glibc question - 'RT using linux kernel aio'

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