The main component of most operating systems, the kernel manages most of a computer's communication between hardware and software. Typically, the kernel is the lowest level of abstraction a programmer can have to a resource.

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ioctl to partition - disk error?

I see the following lines flooded in my /var/log/messages file. mdadm: sending ioctl 1261 to a partition The following lines were also seen but now I've fixed this issue, could this be related to ...
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19 views

What is the relationship between /3GB boot flag, PAE kernel, LargeAddressAware PE flag and 36Bit Memory addressing in Windows 32bit?

After I read that Windows 2003 Enterprise 32bit support more than 4GB, I realize that the rest editions are being crippled even when using PAE kernel (ntkrnlpa.exe / ntkrpamp.exe). So could someone ...
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1answer
19 views

How To Determine Device Data Transfer Amount

Is there a way to determine the amount of data transfered to/from a device. I'm not asking about the block or sector size. I want to know the amount transferred by a read/write operation. For ...
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9 views

Possible kernel bug?

I found this in my dmesg: [10877.030980] ------------[ cut here ]------------ [10877.030987] kernel BUG at /build/linux-baBndT/linux-3.2.60/mm/mmap.c:2275! [10877.030993] invalid opcode: 0000 [#1] ...
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9 views

linux-headers and images in ubuntu after installing vmware-tools

a noob question. Can I run dist-upgrade for linux-headers and images in ubuntu after installing vmware-tools? I ask this because i think vmware-tools also install something like a header and image ...
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11 views

loading second vm in first one w/out rebooting by use of kexec

I've two CentOS virtual machines on my win8 host's vmware. I added one of the virtual machines to another by 'add hdd' of settings of VM. The versions of Centos is 6.4 i686. I installed kexec-tool on ...
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7 views

Can I install a higher version kernel template in VM/LXC Containers

I am reading up on LXC and related Docker . I have a few basic doubts . Is it possible to install a higher kernel version into a VM Does the same apply to LXC's ? I know I need to know what are ...
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1answer
41 views

Error while compiling linux kernel

Hi I'm trying to compile a kernel on Centos 7. I've installed kernel-devel package, but it's failing as follows: [root@centos7 3.10.0-123.6.3.el7.x86_64]# LANG=C make V=1 make -f ...
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1answer
82 views

Which is the best kernel version to upgrade in Debian Wheezy?

I have Debian Wheezy kernel version 3.2.0-3-amd64 (stable). I want to upgrade my kernel version. Here there are many descriptions and source package of kernel. I red that Torvalds has been announced ...
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0answers
28 views

Thinkpad Yoga “Disk I/O Error” (Linux)

My machine is sporadically remounting the SDD readonly due to a "Disk I/O Error". This seems only to happen when I connect to the laptop to a power source or after resuming from suspend. The SSD ...
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33 views

How to stop jbd2 to release a device

In an AWS EC2 instance, we have multiple EBS volumes. When I try to detach any of them, the umount command works, but the device can't be detached. # grep -c xvdj /proc/mounts 0 However, lsof ...
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27 views

What actually happens when computer hangs [closed]

When we come to a point where computer hangs, what does actually happen inside of Windows's or Linux's kernel? Could a user space application be the cause that a whole os i frozen or could it just ...
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0answers
15 views

How to apply a kernel patch from lkml?

How do I patch the kernel from a patch from lkml? Specifically this link : https://lkml.org/lkml/2014/5/9/517 I am running debian. I know how to roll a deb package, but I can't figure out how to do ...
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1answer
19 views

remotely boot into different kernel version

I have a remote machine with Ubuntu 12.04 and the following kernel versions installed: :/lib/modules# ls 2.6.39.4 3.0.0-21-generic 3.2.0-25-generic 3.2.0-25-generic-pae 3.2.0-27-generic ...
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10 views

Is ramdisk_size still needed with a .cpio initrd?

I'm creating a rescue system with the following two files: rescue.linux (version 3.2) initrd.cpio The initrd.cpio file can be quite large, larger than the default 4MB of a ramdisk. However, it ...
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14 views

kernel configuration: select specific drivers or symbols regardless of dependencies?

Is there a way in "make menuconfig" et al. to start with enabling device drivers that you want included, and have it enable the necessary (dependent) generic options and APIs automatically? As it is, ...
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0answers
52 views

Stuck on GRUB command prompt after regular kernel update

I am running Debian Wheezy. Update Manager suggest to install kernel update. After update, I reboot system but instead of listing all the kernels (bootloader), it gave me a GRUB command prompt: ...
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1answer
76 views

Debian boot hangs

I created a Debian USB stick image from the experimental repo with the latest kernel 3.15 RC8, used Syslinux. I wrote the image on a USB stick and I booted from it on two different computers. On the ...
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1answer
48 views

What is the difference between “make modules” and “make modules_install”

I'm currently looking up compiling a custom kernel and I find various guides that first say make modules and then make modules_install in the step when you compile and install the modules while other ...
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1answer
69 views

How to check Intel iGPU frequency on Linux?

I own Intel Haswell G3420. At stock its iGPU has 1,15 GHz turbo frequency. In my UEFI I overclocked the iGPU to 1,5 GHz and added voltage. However the framerates in both benchmarks and games are the ...
2
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1answer
424 views

why does my Mac keep crashing?

(I will have to do this fast, since I think my mac will crash again.) My Mac keeps crashing. It started happening since I installed Adobe Acrobat Pro (since then I have removed it), but it might be ...
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1answer
78 views

Linux Kernel Driver for video capture

I have this EasyCap video capture thing with a USBTV007 chip and I really would like to get it working on my little linux mint 17 laptop so that I can capture video for my RC stuff. But I do not know ...
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2answers
56 views

How to install usbnet driver on kernel 2.4.23-2.5-ts/

I searched in the directory "/usr/lib/modules/2.4.23-2.5-ts/kernel/drivers/net/usb/" for the usbnet but i didn't find it so how can i install the usbnet driver,i don't know where to start or how to ...
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28 views

Fedora: Get a list of installed kernels by Date

I want to get a list of installed kernels in decreasing order on the date which they were installed. Any idea on how to do this? I am on Fedora 20
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24 views

make-kpkg: how to get the correct links in /lib/modules/$version/{source,build}

I'm using make-kpkg to build custom kernel packages (linux-image-.deb and linux-headers-.deb) that I then deploy to my other Linux rigs. The linux-image package created that way creates source and ...
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1answer
52 views

why does NOT the ubuntu 13.10 have the version.h?

/usr/src/linux-header-3.11.0.12 /usr/src/linux-header-3.11.0.12-generic Neither has the version.h file in the /include/linux/. Why? That hinders the softwares installation.
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58 views

Updating kernel on a Chromebook to prep for Chrubuntu

Pretty simple question: I have read that by setting my Chromebook to the dev channel, it will install a later kernel. Currently it's 3.4.0, and it'd install 3.8.0 (64-bit, no less). However, after ...
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1answer
463 views

Updating Chrubuntu 14.04 kernel on Acer C7 (currently 3.4.0)

There was another, similar question on this here, but it's for old ubuntu versions, and the script no longer works. While installing, the script works fine until: + vbutil_kernel --verify /dev/sda6 ...
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43 views

Testing Linux Kernel in QEMU gives black screen after brief text

I'm trying to run a linux kernel (version 3.14) I custom built using make menuconfig. I am trying to test it in QEMU and this is the command I am trying to run: qemu-system-x86_64 -kernel ...
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2answers
45 views

Why I can't upgrade my kernel?

I have perform the following command into ssh shell: sudo apt-get upgrade sudo apt-get update sudo reboot But I still have an old kernel version, infact: pi@raspberrypi ~ $ uname -a Linux ...
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1answer
123 views

how to install 'version.h' in ubuntu ?

Just now , I try to install the Jungo WinDriver in the Ubuntu 13.10 . But I am puzzled by the its manual of how to Install version.h : Install version.h: The file version.h is created when you ...
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48 views

No COM1 port on hyper-v

I just made a fresh Windows 8.1 install and am trying to set-up a VM for kernel debugging. Therefore, I need to create a serial link to debug the VM using windbg. Usually I just simply add a new COM ...
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1answer
41 views

How to specify this 'symbolic link' for the Jungo WinDriver?

Just now , I try to install the Jungo WinDriver in the Ubuntu 13.10 . But I am puzzled by the its manual : 4.2.3. Linux WinDriver Installation Instructions 4.2.3.1. Preparing the System for ...
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0answers
17 views

PCI configuration method error (Linux Kernel)

(I'm not sure if here is the best place for that question, so I will be pleased if anyone suggests me a more proper forum for that.) I'm trying to install Ubuntu 12.04.4 in a netbook (from an usb), ...
0
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1answer
70 views

How to add iptable support to the kernel (for Wheezy/Sid release)

I am running an ARM processor (similar to the raspberry pi) and my kernel doesnt natively support iptables. If I run apt-get install iptables, it successfully installs but NAT tables are unable to be ...
2
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0answers
904 views

Perf samples too long, lowering kernel.perf_event_max_sample rate to

My machine freezes from time to time and I can get it working back by pressing the space key. I have this problem since two weeks now, but it was just once per day max. Now it's starting to be many ...
2
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1answer
40 views

Kernel panics on numerous identical systems running the same OS image

I am trying to diagnose an interesting problem that affects perhaps a dozen or more identical computers. We have an increased rate of kernel panic errors lately, yet I cannot figure out how to ...
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0answers
158 views

kernel panic: VFS: Unable to mount root fs on 03:02

I'm studying kernel compilation for my operating systems course. Unfortunately I'm compiling Linux v2.4.20 and Red Hat 9(yes, they're making us use it and it drives me crazy but I've NO CHOICE ...
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1answer
33 views

Windows HAL dll cannot be used anymore

I ve got this weird problem. For a long time I was running xp sp3 with /hal=halmacpi.dll switch in boot options. Everything fine. I just booted to the "old" normal mode, without the switch. (I used ...
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1answer
2k views

Errors mei_me 0000:00:03.0: timer: connect/disconnect timeout. after upgrade to 14.04

I upgraded from ubuntu 12.10 to 14.04 and now I get dmesg|grep mei [ 19.246502] mei_me 0000:00:03.0: irq 48 for MSI/MSI-X [ 24.280045] mei_me 0000:00:03.0: timer: connect/disconnect timeout. ...
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0answers
17 views

what do i do after editing a *.c file in the linux kernel

I have been having sound issues with the VT1802 AKA VT2002 I have copied over a possible fix into the file patch_via.c in dir /var/lib/dkms/oem-audio-hda-daily/0.201405052014~ubuntu13.10.1/build/ ...
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0answers
97 views

Windows equivalent of alt + sysrq + REISUB/REISUO

Is there a (kernel-level) Windows equivalent to the Linux Magic SysRq key combination REISUO/REISUB? i.e. Redirect keyboard to console Send a quit signal (non-forceful kill) Send a SIGKILL ...
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0answers
76 views

Mount Error (mount: page allocation failure. order:5, mode:0x40d0)

I am trying to mount mtd block on temporary file system(part of RAM). Some times mount command fails and below error comes in dmesg logs. Command: mount -t jffs2 /dev/mtdblock7 /temp/configuration/ ...
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20 views

How to tell which devices have been denied in a device cgroup?

In Linux Control Groups (cgroup), one can use the device subsystem to allow or deny access to device files. By default, all devices are allowed in the top-level cgroup. If I deny a certain device, by ...
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1answer
21 views

Gentoo virtualbox X support

So i wanted to play around in gentoo to level up my linux knowledge. I've installed it on virtualbox, but i didn't add a few USE flags, and during core compilation i didn't select a few necessary ...
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10 views

Output of usbmon ( length field )?

In http://www.mjmwired.net/kernel/Documentation/usb/usbmon.txt#163 it is written that before status tag ,there is data length field ,in my output for usbmon http://pastebin.com/b6U7Je7h please ...
3
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1answer
240 views

How to use usbmon for knowing amount of data transferred from usb (pendrive )?

Please someone explain me in simple terms how to use usbmon to track the amount of data transferred from pendrive ?
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92 views

Debugging linux kernel, SIGKILL

Trying to debug linux kernel (vmlinux) with gdb during my education, but after I run kernel I just got "program terminated with SIGKILL": gdb vmlinux-3.11.0-12-generic ...GDB header... Reading ...
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161 views

Why is the System process using 40-60% of CPU power all the time?

TL;DR: ACPI.sys is constantly using lots of CPU power. Virus and malware scans all come back clean Drivers are up to date (GPU, Chipset, USB devices) Possibly important info: This install of ...
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1answer
46 views

How to add code into the linux kernel?

I am studying how to analyse and evaluate the TCP/IP protocol stack of Linux. My goal is to study the performance of the tcp/ip protocol stack as a whole, to study the time cost of each layer and ...