0
votes
0answers
13 views

SLES 10 SP4 - how to get specific kernel source?

I want to look at the kernel source for some specific kernel versions on SLES 10 SP4. I don't want to see just the Linux kernel source, but the one SLES is actually running. Suppose I wanted to get ...
0
votes
0answers
51 views

inotify does not work with linux kernel 3.4.11

I have a Linux running with kernel 3.4.11. I tried to run inotify-tools, but it does not work (in fact it does not detect the file changes). I checked the .config file of Linux kernel and I found ...
0
votes
2answers
98 views

Linux memory usage?

We have 1TB of memory on a server which hosts an SAP application. When the app is running the memory usage shown in top is around 700GB. When the app is stopped the memory usage shown in top comes ...
3
votes
0answers
34 views

What's the exact behaviour of the command: ip address change?

I have been fiddling with IPv6 and address lifetimes. I found out that the valid_lft attribute will make a v6-address disappear automagically, if used correctly. To extend an address' lifetime I would ...
2
votes
0answers
85 views

Server won't boot, kernel panic - not syncing

After a reboot of a CentOS 6.2 server we are getting a kernel panic with the following error: Kernel panic - not syncing: Attempted to kill init! Panic occurred, switching back to text console ...
1
vote
0answers
150 views

Why does this iptables rule doesn't get configured after a reboot once in a while? [closed]

On my Android network device, iptables firewall rules service script is started by the init.rc scripts during boot time. One of the firewall INPUT chain rules doesn't get configured in the iptables ...
0
votes
1answer
66 views

Kernel 3.14.1 compilation errors

I installed the kernel 3.14.1 and there seem to be no issues. uname -r 3.14.1-031401-generic However, when I try to go to the folder and try to do a make it fails. I see that multiple files are ...
0
votes
0answers
50 views

Extremely slow CD-ROM burning

When I try to burn a CD-ROM using K3B, the burner slows down from 10x to 0.12x after writing exactly 71MB. Consequently, burning a 142MB live CD takes more than a hour. Why is this happening? The ...
0
votes
0answers
28 views

Black screen when kernel boots with vga= parameter

Recently recompiled kernel refuses to do output on the screen if vga parameter was in the list. Without it kernel boots properly as usual, however, before that it changed resolution and RC log ...
5
votes
1answer
146 views

Kernel panic when passing noatime in bootargs

I have an embedded system using jffs2 and want to pass rootflags=noatime in the kernel bootargs parameter. This results in a kernel panic: jffs2: Error: unrecognized mount option 'noatime' or ...
3
votes
1answer
28 views

filesystem that works under qemu and I can mount on my host

I'm using qemu for different kind of tasks, I would like to pick a filesystem that is both qemu-compatible and easy to mount under my host. I already discarded both qcow and qcow2 because apparently ...
1
vote
1answer
37 views

Getty instances in init process

Init typically will start multiple instances of "getty" which waits for console logins which spawn one's user shell process. Upon shutdown, init controls the sequence and processes for shutdown. The ...
1
vote
0answers
67 views

Some questions compiling linux kernel with make-kpkg

I'm doing my first steps compiling the linux kernel and adding a new system call. I've managed to do it, but I still have some questions. For this task, I has set up a Virtual Machine guesting debian ...
10
votes
2answers
719 views

What does a niceness value of (-) mean?

According to the man page, and wikipedia; nice ranges from -20 to 20. Yet when I run the following command, I find some processes have a non numerical value such as (-). See the sixth column from ...
1
vote
0answers
109 views

About Linux Memory Compaction (CONFIG_COMPACTION)

I have a question regarding memory compaction on Linux. Generally compaction is triggered when system cannot satisfy a large contiguous memory allocation. This causes the compaction to run on all ...
0
votes
1answer
43 views

How to select which OS kernel to upgrade when multiple OS'es are installed?

I am trying to upgrade my kernel on a machine with multiple OS'es. I have a Red Hawk OS (a real-time Red Hat variant) and Red Hat installed. I can select which OS to boot into using grub. I'd like to ...
1
vote
2answers
103 views

How I can enable Linux full tickless mode using CONFIG_NO_HZ_FULL?

Where do I enable the CONFIG_NO_HZ_FULL kernel configuration? Is it something I can set in conf files or is it something that has to be enabled when I build the kernel? I am using CentOS with an ...
7
votes
1answer
92 views

Possible to see dead proccesses?

In man ps, it clearly states the different states a process can have on Linux. D Uninterruptible sleep (usually IO) R Running or runnable (on run queue) S Interruptible sleep (waiting for an ...
0
votes
0answers
126 views

Ping IP works, nslookup fails. New Kernel

I am compiling my own 3.14 kernel. I fear I may have left out some important networking feature to get DNS working. I can't resolve domain names. I can ping my DNS server. I can resolve using that ...
1
vote
1answer
46 views

Can a real-time process exist in the 'expired' queue of linux kernel?

In the Linux kernel 2.4: Real-time processes are given a priority of 0-99 and they co-exist in the ready queue along with the nice processes (who's priority goes between 100 and 139). But real-time ...
2
votes
2answers
89 views

Where kernel configuration file is stored?

I currently run Angstrom Linux 2.6.32. I intend to upgrade linux kernel from 2.6.32 to 3.0.7. For this reason, I had to configure kernel 3.0.7 running make menuconfig. Now, I want to compare the new ...
0
votes
2answers
90 views

System too slow [closed]

My linux system is responding very slowly.I should wait to get the result of my command. How can i investigate to know the problem of his behavior?
1
vote
1answer
49 views

How to automate configuration of the Linux kernel build

I'm compiling a flavor of the Linux kernel based on the default configuration (for an ODROID system), with some additional features enabled. I want to automate this process so that I don't have to ...
1
vote
0answers
61 views

Interfacing ds1337 RTC on LPC17xx

I am a newbie and I am trying to understand how to interface DS1337(RTC) on LPC17xx Board. This board uses uclinux 2.6.33. .CONFIG: CONFIG_RTC_LIB=y CONFIG_RTC_CLASS=y CONFIG_RTC_HCTOSYS=y ...
0
votes
1answer
194 views

Can I upgrade my Linux kernel from 2.6.32 to 3.0.7?

I currently run Angstrom Linux 2.6.32 on BeagleBoard-xM (ARM architecture). Can I upgrade my Linux kernel from 2.6.32 to 3.0.7 and what is the difficulty level in case upgrade is possible? EDIT#1: ...
1
vote
0answers
51 views

Where is Linux kernel development headed? [closed]

I regularly read development updates from various components of the Linux ecosystem. Of all these, the kernel is the one that seems least transparent to me. Typical kernel release notes mention tons ...
0
votes
0answers
74 views

How to cause memory fragmentation on a Linux based embedded device?

Hardware ARM What am I trying to do: Answer: I am trying to create memory fragmentation on a Linux 2.6.31 based swapless embedded device. Why: Answer:I am trying to port some patches to Linux ...
3
votes
2answers
521 views

BSD Kernel Vs. Linux kernel? [closed]

I wanted to know in technical terms; what is the difference between BSD Kernel and Linux Kernel. In Linux, we can download the source kernel then patch it and make and make modules it. Even we have ...
5
votes
1answer
190 views

Linux: What is a tainted kernel?

Under certain conditions, the Linux kernel may become tainted. For example, loading a proprietary video driver into the kernel taints the kernel. This condition may be visible in system logs, kernel ...
12
votes
3answers
2k views

Why there are many BSD systems but only one Linux kernel?

Why there are many BSD systems but only one Linux kernel? I wonder why BSD was forked many times, but no such thing with Linux.
1
vote
2answers
303 views

Kernel Configuration: Which Processor Family to choose for 'Celeron M CPU 420' (Core Solo)?

I am trying to build custom kernel (version 3.12.13) for my old laptop and I am unable to determine the Processor Family from the provided list. ( ) 486 ( ) 586/K5/5x86/6x86/6x86MX ( ) ...
1
vote
3answers
61 views

Structure of GNU/Linux [closed]

I have some basic knowledge about Linux OS like it consist of Kernel.The kernel is core of Linux , It manages all processes, device drivers, and I/O.But My Question is what Linux consists of beside ...
1
vote
0answers
92 views

KMS Terminal: How to disable second screen, or how to force a certaion resolution?

I have two screens with different native resolution connected to my Gentoo/systemd machine. since the VTs try to mirror the outputs, they do not use the whole size of the higher resolution screen. I ...
1
vote
1answer
90 views

Debian/Ubuntu:How to compile a Linux kernel on one machine and use on other machines (same architecture)

Debian/Ubuntu: How to compile a Linux kernel on one machine and use on other machines (same architecture)? I know how to do it on the same machine. But to use a compiled kernel other machines, is ...
5
votes
0answers
155 views

Why are cgroups mapped differently on these two systems by systemd

I have two systems, both running customized variants of OpenSuSE 12.2 (Mantis), both running exactly the same kernel. I get two very different outputs of /proc/self/cgroup or /proc/$$/cgroup on the ...
-3
votes
1answer
39 views

RHEL6: Failed Dependencies when installing a package

Hi I'm getting errors when forcing to install unixODBC package on RHEL 6 here is the following error: http://flic.kr/p/jBEFvP I don't know where to get the following packages that were needed by the ...
0
votes
0answers
78 views

Issue with Hugepage reservation in linux

I have reserved hugepages for my process using below commands: #echo 64 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages #mkdir -p /mnt/huge && mount -t hugetlbfs nodev /mnt/huge ...
1
vote
1answer
2k views

What do the kernel parameters acpi_osi=linux and acpi_backlight=vendor do?

I had troubles with the screen brightness control in my laptop and I fixed it by adding the acpi_osi=linux and acpi_backlight=vendorparameters to the filegrub.cfg. I'd like to know what these ...
2
votes
1answer
129 views

How to build a basic embedded linux on a Qualcomm router?

Not knowing the first thing on how to build a minimal linux system on an embedded device, I'd like to get some pointers in the right direction. Generally speaking, I'd like to know what are the ...
0
votes
0answers
168 views

Compiling Linux and Creating Bootable ISO Image

I have already compiled Linux kernel 3.12.6 but did not install it into /boot as I did not want my hard disk to have another OS. I have the compiled bzImage and I don't know how to take that and ...
2
votes
1answer
44 views

Make Install Linux Kernel Location Change

I have already run make to compile the Linux Kernel 3.12.6, but when I run make install, I don't want it to install it in /boot (as I don't want another OS on the hard disk). How can I change it so it ...
0
votes
1answer
265 views

how do I include the qcserial module in the kernel?

I need a kernel compiled, featuring the qcserial module to have support for the Huawei EM 680 model (Gobi 3000). I got kernel 3.11.6 and can find the appropriate source file in ...
0
votes
2answers
86 views

Which runlevel is best for a Linux (Debian) server (DBMS/SCM)?

I currently try to harden the system and the security of a Debian server running a database and a source code management. I just want networking and me (one user) to be able to login. Which runlevel ...
2
votes
0answers
45 views

Detach keyboard from the kernel

I am writing a remote controller app for an octocopter and want to use a keyboard as an input device for this app but I don't want it to have any effect outside this app. Somehow I would like to make ...
0
votes
1answer
118 views

How to run just linux kernel in vmware?

I am VERY new to Linux and am wondering if you can just boot the Linux kernel by itself or does it absolutely HAVE to be apart of an operating system. My reasoning behind wanting to do this is so that ...
2
votes
1answer
191 views

How can I run gdb in one machine and run kgdb kernel in another machine?

I want to run two machine: debugged machine: compiled kernel with kgdb option. debugger machine: for running gdb How can I debug machine 1 from machine 2?
1
vote
0answers
63 views

Kernel IPsec SA database: FIFO instead of LIFO

When processing an IP packet, the kernel looks into the security policy (SP) database to determine whether it is to be protected with IPsec. If the identifiers of the packet (e.g. IP addresses, etc.) ...
3
votes
1answer
145 views

Find kernel with specific commit

I have recently bought an Acer Aspire E1-572 with NetXtreme BCM57786 Gigabit Ethernet network card. The problem is that currently I cannot see it in ifconfig, but I can see it with lshw: *-network ...
4
votes
1answer
187 views

Know which directory is “mount -o bind” by asking the kernel (Linux)

If I do mount -o bind /my/dir /mnt/tmp, I can see the content of /my/dir within /mnt/temp. However, if I type cat /proc/mounts, I get the following output: /dev/sda7 /my ext4 ...
3
votes
3answers
75 views

Disallow File IO for a process except for FIFOs

How do you start a process that cannot do any file IO (opening / closing files, creating / deleting files, reading / writing files, etc.), except to read and write to pre-created FIFOs? (chroot will ...