Arch Linux

Ogashi

Member

Registered: 2017-03-05

Posts: 5

Slow shutdown/reboot

Hi everyone,
I'm having this issue for a while now, I didn give it much importance but now is getting annoying and I would like to solve it. My computer takes a long time for shutting down/rebooting, but not always, more or less once out of two times. I found this post, which gives instructions for debugging the shutdown process, and here is my output http://paste2.org/9Yhb7B2Z. I don't really know what I'm looking for, but there are lots of "Failed to send unit remove signal for...: Transport endpoint is not connected", until it forces shutdown. I have read some similar cases where the problem was some network shares, but that is not my case. Any clue on this? Thanks for your effort.
Sincerely,
James

Docbroke

Member

From: India

Registered: 2015-06-13

Posts: 1,448

Re: Slow shutdown/reboot

this looks interesting

 systemd-udevd[188]: maximum number (16) of children reached 

There are plenty of this errors, and probably reason of slowing down. Have tried to search for this error?

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https://github.com/Docbroke

Ogashi

Member

Registered: 2017-03-05

Posts: 5

Re: Slow shutdown/reboot

Hi Docbroke,
thanks for pointing that out. I've searched for that and I find some people having issues with this error, but none related to a slow shutdown/reboot. But, they claim that setting the children limit depending on ram leads to too much concurrent I/O. On the other hand, limiting it by the number of CPU cores (8 + <num_cpu> * 2) could cause the slowing, perhaps? Here is shown the kernel parameters used to change this limit, but I don't honestly know which one would be a good value.
James