Questions tagged [linux-kernel]
Questions about Linux kernel and Linux kernel related topics eg. implementation details such as system calls, kernel customization, etc. For Linux user space topics which do not involve kernel details, [linux] or distribution tag are more suitable.
3,703 questions
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disabling I8042 driver completely
"i8042 is still probing even though I disabled CONFIG_SERIO_I8042. Does it have dependent configurations? Even after passing kernel command-line arguments: i8042.nopnp i8042.noaux , I still see ...
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how do I find the current i2c bus speed?
I am building custom game controllers on Linux that use the i2c bus present in video ports such as HDMI, dvi, and VGA, on standard PC hardware (x86_64). I would like to verify my current i2c bus speed ...
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Is it possible that multiple network interface (net_device) tied to a single physical adapter
I am new to the Linux kernel. Recently, I read some articles about Linux "network interface", understanding that it is a logical abstraction layer of the underlying physical adapter (NIC), ...
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Load new version of non-removable running kernel module
I have an embedded Linux device (Ubiquiti EdgeRouter-X, see this thread for more detail) for which I cross-compiled the kernel module nf_conntrack.ko (part of netfilter) to support a protocol that was ...
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I am having BTRFS error. Does not know what it is?
I am using Parrot OS and doing just regular stuff (web surfing etc) and encounter this error. It is a File system error but could not figure out what this mean and how to resolve it. This is my first ...
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How to debug the Linux kernel or device driver if the motherboard has no serial port?
I am used to debug Linux device driver through the serial port on the motherboard to see the real-time message before the system hang. But now I have a brand-new server board, MSI MPG Z890 CARBON WIFI,...
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What is a parked thread in Linux kernel?
What is a parked thread in the context of Linux kernel? I mean a thread that is in TASK_PARKED state? How this state differs from TASK_INTERRUPTIBLE and TASK_UNINTERRUPTIBLE? From which state a thread ...
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hugepages allocated via mmap not being freed up by Kernel even after unmounting hugetlbfs filesystem (OL9/UEK7)
We have an c++ application that allocates and uses hugepages memory (via Jemalloc hooks). Chunk (2MB) allocation happens via mmap with protection flags PROT_READ | PROT_WRITE and flags MAP_SHARED | ...
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CPU affinity not following cpuset
When I run taskset -p <pid> of a process I am getting something like this back: # taskset -p 1078 pid 1078's current affinity mask: 3f And it keeps changing what it reports, sometimes it's 5f, ...
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What does "BTRFS warning (device nvme0n1p7): devid 1 physical 0 len 4194304 inside the reserved space" mean?
On mount, I see the following warning in dmesg: [ 0.913159] BTRFS warning (device nvme0n1p7): devid 1 physical 0 len 4194304 inside the reserved space More log context: [ 0.909896] BTRFS: ...
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Kernel APIs to disable/enable CPU cores within a driver module
I have a linux kernel version 6.8.0-57-generic (Ubuntu Jammy). I want try disabling and enabling the cores in the CPU through the linux kernel module (from kernel space) What is the right way to do ...
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Unable to Mitigate GDS (gather_data_sampling) using Fedora 41, 40 Intel HP
I was using Fedora 40 and upgraded the system to Fedora 41 still getting this from my cpu information $ cat /sys/devices/system/cpu/vulnerabilities/gather_data_sampling Vulnerable: No microcode The ...
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Limit length of a scatterlist entry produced by dma_map_sg
The documentation for DMA in Linux kernel states: The implementation [of dma_map_sg] is free to merge several consecutive sglist entries into one (e.g. with an IOMMU, or if several pages just happen ...
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What is `BLKSECDISCARD`?
I've been trying to get a "clean" f2fs format on a WD SSD drive. But there is something that bugs me, and I cannot seem to find any specific details on it. When I format the SSD with f2fs: $ ...
- 3,727
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Debian | can't install linux-headers-6.12.12+bpo-amd64; function “strlcpy” is unknown
I'm a Debian 12 derivative and I'm trying to install Nvidia drivers. To do so, I needed to install linux-headers and dependencies: First, I've checked my kernel info, uname -r 6.12.12+bpo-amd64 After ...
