This tag is for questions about the internals of the Linux kernel itself - particularly about use or configuration of kernel modules or drivers.

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1answer
222 views

Where is my /boot/grub/menu.lst file

I m using VMware for my linux version Ubuntu 11.04 and i have searched for /boot/grub/menu.lst file but this file was not there. Why?? I was creating a new kernel in virtual linux but unable to ...
1
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0answers
500 views

bash autocompletion is slow, freezing my desktop

sometimes when working with a custom kernel, pressing tab in the bash autocompletes at a horrible pace. It freezes the whole desktop. Then comes back after awhile. This is the only quirk that I've ...
0
votes
1answer
267 views

UDP packets from kernel

I would like to know what is this and how can i stop this? Apr 10 15:30:17 -- kernel: [ 1182.295900] [UFW BLOCK] IN=eth0 OUT= MAC=00:16:3e:5b:f3:c1:00:08:e3:ff:fd:90:08:00 SRC=95.37.189.176 ...
0
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1answer
334 views

The difference between task context and process context in Linux kernel

I was reading Linux kernel Document and found in some places, they use task context and process context. linux/Documentation$ grep -R "task context" . ./driver-model/driver.txt:147:The probe() entry ...
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2answers
1k views

In the output of lspci -vv, what do the Region lines mean?

I have the following output from running lspci -vv -s 00:00 on my single board computer running Linux. 07:05.0 RAID bus controller: Adaptec AAC-RAID (Rocket) (rev 03) Subsystem: Adaptec ...
3
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2answers
3k views

How to get a list of active drivers that are statically built into the linux kernel?

While I can use lsmod in order to show currently active kernel modules, how can I see which drivers are statically built into the kernel AND currently active?
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0answers
96 views

How are ties broken in AuFS with the top-down-parent file creation policy?

The AuFS manual says: Policies for Creating create=tdp | top−down−parent Selects the highest writable branch where the parent dir exists. If the parent dir does not exist on a writable branch, ...
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3answers
301 views

Machine needs F1 key to reboot, how to skip this?

Each time the machine (Linux, RHEL) reboots, it waits for F1 key to be pressed in order to continue the boot process. How can I skip this ? These are the message :Node3 DRAM uncorrected ECC ...
0
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1answer
480 views

Intel Wifi card module not visible in linux menuconfig

I've gotten myself into a pickle it seems. I just got the latest gentoo kernel (3.7.10), and it seems that they didn't include my wireless lan driver in the menuconfig (or it depends on another option ...
0
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1answer
1k views

linux ipv6 default route to loopback

I am trying to understand what is the reason that in recent linux kernels there is ipv6 default route to loopback ::/0 :: !n -1 1 4 lo is it ...
1
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2answers
437 views

What kind of methods are used to calculate IP ID fields?

I'm doing a bit of research on the methods of generating the ID field of the IP headers. I have read the sources and other documents and have confirmed that Linux generates a random number for every ...
2
votes
1answer
296 views

GENTOO: disadvantages to using genkernel all?

I'm wondering, what are the disadvantages to using genkernel when I'm compiling a kernel in gentoo? Is it perfectly ok to use genkernel all in pretty much any situation, and skip this ...
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0answers
44 views

Who is filling the ELF header

I have ELF file which I dumped using readelf -h filename and I can see the different fields with the some values like entry point address is 0x99cc ,but really want to know from where these values get ...
2
votes
1answer
88 views

How is PAE implemented in Linux?

There are only 36 physical address lines but a page table entry is 64 bit long. How does the CPU check if the address is valid ? How does Linux OS map the same virtual address in different processes ...
0
votes
1answer
103 views

Permanently detach device

I'm setting up a vm box and I've enabled IOMMU. Works great, except I get PTE Read access is not set errors flooding my dmesg. In particular it is for one device, a USB 1.1 controller, that just ...
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2answers
1k views

How to load a module in gentoo?

I am using gentoo 2.6.30 and I tried to load a module as follows: modprobe usbcore with the response modprobe: module 'usbcore' not found However, I can find a directory with that name in the ...
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2answers
474 views

Linux kernel conflicts

rpm --query --all '*kernel*' kernel-headers-2.6.32-220.17.1.el6.x86_64 kernel-firmware-2.6.32-220.17.1.el6.noarch dracut-kernel-004-256.el6.noarch kernel-devel-2.6.32-220.17.1.el6.x86_64 ...
0
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2answers
180 views

Will dual wireless interfaces in Linux increase my bandwidth? [duplicate]

I have two wireless interfaces connected to the same network. Is it possible for data to be transferred on them simultaneously?
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2answers
151 views

Linux boot parameters and hacking

Bear with me since I'm a linux noob... I had an assignment for a security class in which I was supposed to gain access to a file in on an administrator's desktop. I modified the boot settings by ...
2
votes
2answers
2k views

AR9485 chipset support by linux kernel

The wireless in my Asus P8Z77-V Pro didn’t work (it’s a new machine, in which I installed Debian Linux 6.0.6, kernel 2.6.32-5-amd64), and since I’m not an advanced user, and knew naught about ...
0
votes
1answer
2k views

How to downgrade Linux kernel

I have a Linux machine running RHEL3.8 with kernel release 2.4.21-66.ELsmp. How can I downgrade the Linux kernel to 2.4.21-47.ELsmp? Second: About the last kernel upgrade, can we find logs somewhere ...
1
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2answers
454 views

Linux kernel compiling: standalone OS

Hi guys I'm new to linux kernel compiling so I have some question: By compiling linux kernel are we building a totally standalone OS which doesn't depend on any linux destributions? If yes... Well ...
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2answers
436 views

AMD driver installation kernel header issues

I am having problems getting the AMD linux graphics drivers installed; every time I try to install it errors saying that it cannot find the kernel headers. The current kernel version running is ...
2
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2answers
2k views

Linux: Disable loopback interface from kernel

I know it is possible to bring down lo interface by doing ifconfig lo down. But is it possible to configure the kernel that the lo interface will simply not be available? Please note that I don't want ...
1
vote
1answer
529 views

Radeon HD6570 only working in Linux Kernel 3.6.7

I have an interesting problem getting my Radeon HD6570 graphics card working in Fedora 17: When booting into any Linux kernel version above 3.6.7-4, after GRUB finishes there is no video except for a ...
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0answers
170 views

rtl8111/8168b doesn't work after upgrade linux kernel

my computer has a ethernet controller: realtek semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) my computer is installed archlinux. Before I upgrade kernel, it ...
3
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2answers
2k views

Install VirtualBox on Ubuntu 12.04.1 (on [Samsung] Chromebook)

I have dual booted Ubuntu Linux 12.04.1 LTS on my Samsung Series 5 ChromeBook, and am trying to run/install Oracle VirtualBox (from the generic .run file downloaded from their website). However, every ...
0
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2answers
85 views

the usage of memory is so high on linux

I found memory usage is so high. And i checked it via top command, only 66664k free, my computer's total memory is 12GB. I checked all processes via system monitor software, found all processes cost ...
0
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1answer
74 views

Development environment for embedded system [closed]

I need to develop software in C/C++ for an embedded system. I have Debian 6 running off of a USB hard drive. I would like to be able to generate a stripped-down kernel with modules, and install them ...
0
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0answers
554 views

Kernel OOM killer been called when plenty of memory left while using malloc

The program is a memory exerciser that request multiple chunks of 512MB to malloc. For some reason the node 0 is been memory exhausted while the others are not been called. MemExerciser cpuset=/ ...
0
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2answers
2k views

Grub installer has been deleted in ubuntu

I was installing an operating system (Fedora) in Virtual box which was installed in the Ubuntu Natty Narhwal. it asked me to format the disk (which should format inside virtual machine), which I did ...
1
vote
1answer
150 views

Raid system fails to boot after moving from 2.6 kernel to 3.5

I'm running Gentoo Linux with a custom compiled kernel and I've just migrated from a 2.6 kernel to a 3.5. As my HD's are on RAID 0 mode I use a custom initrd file in order to be able to boot. While ...
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0answers
208 views

Kernel recompilation: mp-bios error 8254 timer not connected to ioapic

After recompiling my kernel I see this error every time I start linux. Os starts fine but I see it is not stable at all: sometimes it freezes and I can just reboot it. I guess it is because of this ...
1
vote
1answer
928 views

How can I get the number of threads running in a process from /proc/[pid]/stat in Linux?

I have the pid of the process. I would like to know the current number of thread running in the process. I know I can read /proc/pid/stat for this information, but I'm not sure how to specifically get ...
0
votes
1answer
208 views

Why does my Slackware 13.37 freeze with a kernel bug?

My Slackware 13.37 started to freeze from time to time. Mouse and keyboard stops working, while xmms still playing the song. I paste my syslog and I hope someone could see the reason it crashes. BUG: ...
1
vote
1answer
3k views

Linux boot - stop the kernel switching to a new framebuffer mode clearing output

I'm working on an embedded system (based onUbuntu 12.04 LTS) and I'm customizing its kernel. I'm having some problem with upstart, mountall and plymouth. Nothing unsolvable I suppose, but the real ...
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0answers
123 views

Installing Kernel 3.5.1 breaks boot up

I have twice tried to update my kernel from 3.2.0.30 to 3.5.1 on my Ubuntu 12.04 32 bit system using two different methods I found via google. In both cases the operation appeared to run flawlessly ...
1
vote
1answer
191 views

Is there any Base Filtering Engine (BFE) service in Linux similar to windows

In windows we have Base Filtering Engine which helps applications to monitor network traffic. Is there any similar service which runs in Linux too. Something similar to a packet filtering service. I ...
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0answers
151 views

An error during bochsdbg installation

I want to install bochs which can debug the kernel. First, I download a package, then: tar zxvf bochs-2.4.6.tar.gz<br> cd bochs-2.4.6.<br> ./configure --enable-debugger --enable-disasm ...
0
votes
1answer
109 views

I'm compiling a modified Linux kernel in Ubuntu; can I recover from a corrupted kernel if I boot into recovery mode?

I have installed Ubuntu from wubi.exe along-side windows, and I am a new user to it. If my kernel has an error after modifying it and replacing the previous one, does the "safe" option in my ...
1
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1answer
27 views

which module of linux kernel can be loaded dynamic

So, is there a list of the modules which are loadable? Is the schedule module loadable? my english is poor, maybe you know what I say.
5
votes
1answer
253 views

Kernel hacking methodology - how to find out where to hack the linux kernel

I have a throw-away cheap laptop I'd like to twiddle around, a Thinkpad SL 500. What bothers me are two leds, the one for wireless connectivity, and the one for hibernation, which don't light up at ...
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3answers
297 views

Linux How can I prove if udev installed?

How can I prove if udev is installed and working proper? Just call udevadm would be a method, right?
1
vote
1answer
62 views

A tiered approach to cloning linux partitons

I'm looking at a strategy for cloning Linux (root) partitions without having to use a Live CD. Literature suggests rightly that the source and target partitions must be umounted to be able to get a ...
1
vote
2answers
868 views

Update in grub.cfg file for loading new kernel image in Ubuntu 11.04

I am new to Linux. I am compiling Linux kernel (ver: 2.6.34.12) in gcc in traditional manner in VMware machine in Ubuntu (kernel version - 2.6.38-8-generic) 11.04 version. I am unable to find, where ...
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0answers
2k views

How to make VirtualBox or VMWare (or any other virtualization software) use a native guest network driver?

I've just posted something in stackoverflow and was asked to post this question here. I have a problem I could use some help with... I am really not an expert in virtualization, so I don't know if ...
0
votes
1answer
136 views

in which kernel version CONFIG_IP_NF_MATCH_OWNER appears?

In which kernel version CONFIG_IP_NF_MATCH_OWNER key appears? I dont see it while make mennuconfig on 3.2.28 that I am trying to compile for my ubuntu 12.04 (3.2.0 - default kernel version).
0
votes
1answer
529 views

serial console output goes away while booting

I added console=ttyS0,57600n8 to my kernel command line. I get the normal boot messages until this [ 5.123106] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) Begin: ...
3
votes
1answer
6k views

Where can I find the Linux kernel file?

Is there any common directory to find kernel file in all Linux distributions?if yes please tell me how to browse to the directory? Where can I find the Linux file in Ubuntu & RedHat operating ...
0
votes
0answers
229 views

Not able to mount HFS partition in Linux (SD Card)

I am trying to mount an HFS Plus partition in my Linux embedded target(2.6.35) and I ended up with the following error: "mount -t hfsplus /dev/mmcblk0p9 /mnt" mount: mounting /dev/mmcblk0p9 on /mnt ...