Wandering Thoughts archives

2024-12-27:	Cgroup V2 memory limits and their potential for thrashing
2024-12-23:	A gotcha with importing ZFS pools and NFS exports on Linux (as of ZFS 2.3.0)
2024-12-14:	ZFS on Linux and block IO limits show some limits of being out of the kernel
2024-12-13:	Cgroup V2's cpu.idle setting versus process niceness
2024-12-12:	Improving my desktop's responsiveness with the cgroup V2 'cpu.idle' setting
2024-12-10:	My wish for VFS or filesystem level cgroup (v2) IO limits
2024-11-30:	Using systemd-run to limit something's memory usage in cgroups v2
2024-11-25:	What NFS server threads do in the Linux kernel
2024-11-24:	The question of how many NFS server threads you should use (on Linux)
2024-11-18:	Ubuntu LTS (server) releases have become fairly similar to each other
2024-11-04:	A rough equivalent to "return to last power state" for libvirt virtual machines
2024-10-31:	Pam_unix and your system's supported password algorithms
2024-10-27:	Linux's /dev/disk/by-id unfortunately often puts the transport in the name
2024-10-25:	Using pam_access to sometimes not use another PAM module
2024-10-24:	Having an emergency backup DNS resolver with systemd-resolved
2024-10-15:	A surprise with /etc/cron.daily, run-parts, and files with '.' in their name
2024-10-10:	Linux software RAID and changing your system's hostname
2024-09-30:	Resetting the backoff restart delay for a systemd service
2024-09-28:	Options for adding IPv6 networking to your libvirt based virtual machines
2024-09-23:	Mostly getting redundant UEFI boot disks on modern Ubuntu (especially 24.04)
2024-09-16:	Why my Fedora 40 systems stalled logins for ten seconds or so
2024-09-07:	I wish (Linux) WireGuard had a simple way to restrict peer public IPs
2024-09-05:	The problems (Open)ZFS can have on new Linux kernel versions
2024-08-28:	How not to upgrade (some) held packages on Ubuntu (and Debian)
2024-08-22:	I used libvirt's '`virt-install`' briefly and it worked nicely
2024-08-17:	Why and how I keep around spare libvirt based virtual machines
2024-08-09:	The Broadcom 'bnxt' Ethernet driver and RDMA (in Ubuntu 24.04)
2024-08-08:	How Linux kernel driver modules for hardware get loaded (I think)
2024-07-22:	The challenges of working out how many CPUs your program can use on Linux
2024-07-18:	The Linux Out-Of-Memory killer process list can be misleading
2024-07-10:	Fedora 40 probably doesn't work with software RAID 0.90 format superblocks
2024-07-05:	Gtk 4 has decided to blow up some people's world on HiDPI displays
2024-07-03:	Fedora 40 and a natural but less than ideal outcome with 'alternatives'
2024-06-30:	The systemd journal doesn't force you to not have plain text logs
2024-06-28:	I wish systemd didn't require two units for each socket service
2024-06-26:	The xinetd restart problem with binding ports that we run into
2024-06-23:	Some notes on ZFS's zstd compression kstats (on Linux)
2024-06-20:	Where Thunderbird seems to get your default browser from on Linux
2024-06-12:	The Linux kernel NFS server and reconnecting client NFS filehandles
2024-05-22:	The Prometheus host agent's 'perf' collector can be kind of expensive
2024-05-13:	Some ideas on what Linux distributions can do about the new kernel situation
2024-05-12:	The Linux kernel giving CVEs to all bugfixes is sort of predictable
2024-05-10:	It's very difficult to tell if a Linux kernel bug is a security issue
2024-04-29:	Our likely long term future (not) with Ubuntu (as of early 2024)
2024-04-23:	Libvirt's virt-viewer and (guest) screen blanking
2024-04-22:	Making virtual machine network interfaces inactive in Linux libvirt
2024-04-19:	Modern Linux mounts a lot of different types of virtual filesystems
2024-04-17:	Limiting the maximum size of Amanda debug logs with a Linux tmpfs mount
2024-04-11:	Getting the underlying disks of a Linux software RAID array
2024-04-10:	It's far from clear how grub package updates work on Ubuntu
2024-03-31:	Some thoughts on switching daemons to be socket activated via systemd
2024-03-22:	The Linux kernel.task_delayacct sysctl and why you might care about it
2024-03-21:	Reading the Linux cpufreq sysfs interface is (deliberately) slow
2024-03-18:	Sorting out PIDs, Tgids, and tasks on Linux
2024-03-16:	Some more notes on Linux's `ionice` and kernel IO priorities
2024-03-13:	Restarting systemd-networkd normally clears your 'ip rules' routing policies
2024-03-10:	Scheduling latency, IO latency, and their role in Linux responsiveness
2024-03-07:	Some notes about the Cloudflare eBPF Prometheus exporter for Linux
2024-03-06:	Where and how Ubuntu kernels get their ZFS modules
2024-02-23:	Fixing my problem of a stuck '`dnf updateinfo info`' on Fedora Linux
2024-02-21:	What ZIL metrics are exposed by (Open)ZFS on Linux
2024-02-20:	NetworkManager won't share network interfaces, which is a problem
2024-02-13:	What is in (Open)ZFS's per-pool "txgs" /proc file on Linux
2024-02-12:	Linux kernel boot messages and seeing if your AMD system has ECC
2024-02-10:	My plan for backups of my home machine (as of early 2024)
2024-02-07:	What I'd like in a hypothetical new desktop machine in 2024
2024-02-06:	What the `max_connect` Linux NFS v4 mount parameter seems to do
2024-01-18:	Notes on the Linux kernel's 'irq' pressure stall information and meaning
2024-01-17:	Some interesting metrics you can get from cgroup V2 systems
2024-01-12:	What we use ZFS on Linux's ZED 'zedlets' for

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