[systemd-devel] Strange behavior of socket activation units
Hello, I have encountered this kind of problem. This particularly is MariaDB 10.6 installation to Debian. Nearly every application that is restarted/started dies on: Failed to get properties: Unit name mariadb-extra@.socket is missing the instance name. Failed to get properties: Unit name mariadb@.socket is missing the instance name. This is kind of strange as those are for multi target version and should not be launched if I don't have mariadb@something.service added or make specified systemctl enable mariadb@something.socker which I haven't. They don't show up in dependencies of mariadb.service or other service file? Sincerely, Tuukka
[systemd-devel] Which distributions copy systemd-networkd 'link' files into the initramfs?
Is this just a Debian (and derivatives) feature, or more common? I just spent nearly an hour trying to figure out why the link file changes I'd made on a system were not working properly, and this was the cause. I even ran 'networkctl status' on an interface that should no longer exist, and it reported a 'Link File' path that did not exist... because it *used* to exist (in /etc, not /usr), and had been copied into the initramfs. At a minimum, I'd like to suggest to the relevant distros that they modify systemd.link(5) to clearly indicate that this behavior exists and that any changes to link files must be accompanied by an initramfs update or the behavior on the next system boot may result in a non-functional network.
Re: [systemd-devel] Udevd and dev file creation
On Sun, Feb 06, 2022 at 01:43:08PM +0530, Nishant Nayan wrote: > While reading the code I came across :- > struct Manager > struct Worker > Can you please provide an overview on these, I did not get a clear cut > explanation on these structs, the code only has its member variables. Those are the "workers" that handle the uevents that are sent by the kernel. Put the program in a debugger to see how they work if you have questions. > Also what is the variable 'arg_children_max' > Why is it specifically set to 8 + no_of_cpus*2 ? Because based on tuning, that's the "best" number that was come up with. If in your testing you think it should be different, please submit a patch. But note that the current number has been tested to work well on both single CPU machines, as well as machines with thousands of cpus that bring hundreds of thousands of devices online all at once when booting. thanks, greg k-h
Re: [systemd-devel] Udevd and dev file creation
While reading the code I came across :- struct Manager struct Worker Can you please provide an overview on these, I did not get a clear cut explanation on these structs, the code only has its member variables. Also what is the variable 'arg_children_max' Why is it specifically set to 8 + no_of_cpus*2 ? Regards Nishant Nayan On Tue, 1 Feb 2022, 14:13 Greg KH, wrote: > On Tue, Feb 01, 2022 at 10:08:04AM +0530, Nishant Nayan wrote: > > Thanks, I will check that out. > > Is there any site where I can gain in depth code level knowledge of > > systemd-udevd? > > The code is all there for you to read and understand directly. What > specific questions did you have that you did not understand after > reading it? > > thanks, > > greg k-h >
