Questions tagged [linux-kernel]
The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems. It is one of the most prominent examples of free and open source software.
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Linux hangs on IO operations [migrated]
Since several days now, my Linux desktop (Fedora Linux 43 Workstation) has occasional IO "hangs". So far I noticed
Playing MP3s from an NFS filemount
Writing to the local filesystem (e.g. ...
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Trouble Netbooting RHEL 10.0 over HTTP / iPXE / GRUB on older CPUs
After some time, I decided to update my install server to the latest RHEL releases (8.10, 9.6, 10.0).
There were no issues with releases 8.10 and 9.6, but with release 10.0 I encountered a problem.
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NF Tables : why this last check is failing?
I am trying to setup some very specific rules with NF tables, but I am stuck at some point. There is obviously something I am missing. Here is the script I am using:
#!/usr/sbin/nft -f
flush ruleset
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Actual sequence of events from memory pressure to OOM for cgroups V2
I was trying to understand the sequence of events leading to a OOM kill in a container, which is eventually OOM invocation by memory controller of linux kernel.
Assuming we are using cgroups V2, I ...
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Kernel threads number change between Debian 10 and 11
Upgrading an infrastructure based on Debian workloads, I can see my monitoring alerting when upgrade from Debian 10 to 11.
Same hardware, same workload, same applications and services running I can ...
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A method to generate high amount of hardware interrupts on Linux x86?
I am studying a performance (progress guarantee?) problem of an x86 hypervisor. The current hypothesis is there is a high amount of interrupts caused by concurrently running unrelated processes or ...
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Many old kernel packages not being autoremoved
I have a vintage debian system, currently running bookworm.
I notice there are many old kernels hanging around:
mafro@locke:~ > dpkg -l "linux-image*"
Desired=Unknown/Install/Remove/Purge/...
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How to troubleshoot reboot issue after disruptive kernel patch
We applied the monthly kernel disruptive patch but the server didn’t boot up after the patches. We rebooted manually from vcenter tool without any issue.
My patch is completed on 12, Jul 00:26
. Could ...
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journald is suppressing auditd events sent out by rsyslogd
I've encounterd an odd behavior I do not fully understand. Journald is supressing auditd messages being send out by rsyslog to a remote server for some reason on my centos 7-x64 VM:
Thats the ...
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Why does qdisc in tc not reflect congestion on my wireless interface under high UDP load?
I'm observing unusual behavior with the fq_codel qdisc on my wireless interface in Ubuntu 18.04 (kernel version 4.15.0-20-generic). During a stress test with high upstream UDP load (~8 Gbps) on a ...
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I am setting up some new compute nodes but they are performing poorer than older nodes
So as the question says, I am in the process of migrating to new compute nodes. The new servers are HPE Proliant DL360 Gen 10 and the operating system installed is Ubuntu. These are the specifications ...
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In the XFS file system, does the ls command (syscall getdents) access the disk, or is there a cached directory structure in memory? [closed]
Just for test, I created and mounted the same XFS file system on two hosts based on a shared device (pmem).Host A created a file in its mounted directory and executed the sync command to ensure that ...
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How to find reason(s) for massive packet drops, between physical interface and virtual bridge?
I have two Proxmox hosts connected to one switch. Both Proxmox hosts have identical hardware, and are connected to the switch using LACP with two links in a bond.
The WAN connection is connected to ...
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Critical temperature reached, shutting down. But system does not shutdown
The system shows these messages in the terminal upon reaching the critical temperature (70c):
acpitz: critical temperature reached, shutting down
reboot: HARDWARE PROTECTION shutdown (Temperature too ...
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Where the default network kernel parameters for pods come from
I know how to set a pod's kernel parameters but I want to know Where the default network kernel parameters for pods come from.
I tried to look up the answer online, but there is very little ...
