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Questions tagged [kernel-modules]

104 questions
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Module ip_tables not found after upgrade

Since I upgraded recently my Ubuntu server from 20.04 to 22.04 I have an issue with Docker. Docker will not start any more after reboot, because of the ip_tables module. After every reboot of Ubuntu the ip_tables module is not available, lsmod |…
Ar_wed
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BTRFS on RHEL8 - compiling kernel module or making userspace tools work

Context I recently installed RHEL 8 without realizing that it no longer supports BTRFS. Unfortunately, I have 4 disks in BTRFS RAID10. I don't have enough space on my other disks to hold the data present on the BTRFS disks, so copying it all…
catleeball
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Linux kernel version with (uname -r) does not show distribution version, where can I get the kernel source for this kernel?

I'm trying to compile a specific kernel module for my linux machine running on a hosted dedicated VPS. The VPS instance is running Ubuntu 20.04 64bit. In order to get the source code for the kernel I need to find out the exact kernel version. When I…
dihit32745
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Is buddyinfo valid in virtual machines

Buddyinfo shows number of contiguous pages for each order available. Since virtual machine treats host's virtual memory as its physical memory does any kernel module allocating higher order memory from buddyinfo work?
kalyan
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Unable to print the message sent from user space C application to Linux kernel module

I have developed a simple Linux kernel module : #include #include #include ssize_t exer_open(struct inode *pinode, struct file *pfile) { return 0; } ssize_t exer_read(struct file *pfile, char…
gaston
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linux: truecrypt/veracrypt/luks/etc without /dev/loop*

I'm using a linux system without any /dev/loop* devices and without the loop module compiled into the kernel, and I don't have the option of upgrading the system or kernel. I want to use luks, truecrypt, veracrypt, or something similar to create a…
HippoMan
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How can I determine which kernel module is responsible for a specific connection showing in NetHogs?

I currently rent a dedicated server from OVH, and I was looking at nethogs to see how much connection capacity a specific process was using. I ended up, however, finding a slew of processes there that I did not authorize that are communicating with…
john01dav
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Package dependency issue, not sure safest way to proceed

I am running into a package dependency issue. Can someone help make sense of how to resolve this? Q What steps do i need to take when it says Requires: zfs-kmod = 0.7.7 Available: kmod-zfs-0.6.5.11-1.el7_4.x86_64 (zfs-kmod) for e.g. …
Brian Thomas
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Failed to find Linux Kernel Module

I`m trying to add driver for specific hardware at startup. Module file is located at /lib/modules/4.4.0-66-generic/kernel/drivers/misc/. Also I've tried /lib/modules/4.4.0-66-generic/kernel/drivers/misc/. Module is successfully loaded with…
Dmitry Petrov
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nf_conntrack_ftp module has disappearedl

I've been running a Linode droplet for several years with no problems. In the last month, users have reported FTP connection errors, always related to Passive FTP. Investigation shows that the nf_conntrack_ftp module is no longer loaded. We use…
Ryan Griggs
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Do I need to compile the kernel again?

Compile the kernel, and an option I forgot to give you my card support. Do I need to compile the kernel again? $ Make && make modules_install $ Make install or is there an easier way to activate this feature and not compile everything again.
Kevin AB
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What does the following C-State output mean?

# cat /proc/acpi/processor/CPU0/power active state: C0 max_cstate: C8 maximum allowed latency: 2000000000 usec states: C1: type[C1] promotion[--] demotion[--] latency[001] usage[08724892]…
GP92
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How to find out the response time for C-state to change to higher mode

How much time does the CPU wait to go to higher mode, let's say from C0 to C1? Or if it can be customized, where can I find the current value? Also, does the the C-State changes in stages like first go to C1 mode then wait there for some time, and…
GP92
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Kernel headers not found in Cent OS 7

I was trying to install ixgbevf drivers. # dkms build -m ixgbevf -v 2.14.2 Error! echo Your kernel headers for kernel 3.13.0-74-generic cannot be found at /lib/modules/3.13.0-74-generic/build or /lib/modules/3.13.0-74-generic/source. I tried to…
Senthil Kumaran
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How to compile drivers for Centos 7 with mainline kernel 4.5.0.0-1 from @elrepo-kernel

When using CENTOS 7 with Kernel 4.5, I can not yum install kernel-headers with the same kernel version. I am stuck on 3.10, which is what Centos comes with. How can I install Kernel-headers 4.5 and Kernel-devel which is needed for compiling…
user1955162
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