Solved swap not getting turned on?

astyle

astyle

What I was doing:
astyle said:
You can also limit how much RAM firefox can hog, supposedly. rctl(8) works on jails and specific-number processes. I'm in the middle of reading a klarasystems article about that. Basic idea, if you apply rctl(8) to the jail that has firefox in it, this just might work. But like I said, I'm in the middle of exploring that.
Click to expand...
So, I created a jail following instructions I found on https://wiki.freebsd.org/JailingGUIApplications ... And at the step that says zfs set readonly=on zroot/jails/firefox/root I got an error message saying cannot open 'root/jails/firefox/root': dataset does not exist

zfs list | grep firefox shows that it does in fact exist... So I figured I'd reboot the laptop (Ideapad 720S-13ARR, with 13.1-RELEASE), and try re-running that step again. Well, something went wrong, and the boot process just hung. I managed to notice that the boot process is not turning on swap - because it can't see the swap partition (swapon: /dev/nvd0p3: No such file or directory is the exact line)! Boot process hangs shortly after, I don't get a login prompt or the ability to type anything.

If there's any more info that I could provide to help matters along, please let me know!

FWIW, I tried to boot an install disk as a rescue disk - and it can see the partitions just fine, on the rescue disk, gpart tells me the disk is fine, and will even cooperate when I use swapon /dev/nvd0p3 ! But when I remove the install stick, and boot off the laptop's SSD, it's the same errors...
 
covacat said:
maybe the jail software modified some of the devfs rules
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That's an idea... looking closer at the wiki, the edits suggested there are of the hide/unhide variety:
# /etc/devfs.rules

[devfsrules_desktop_jail=5]
add include $devfsrules_hide_all
add include $devfsrules_unhide_basic
add include $devfsrules_unhide_login
add path 'mixer*' unhide
add path 'dsp*' unhide
Click to expand...

This is the only jail on my laptop so far... I basically want that jail to have the same rules as the metal, no point hiding/unhiding anything. And that hide/unhide probably messed things up for me. I'm gonna try to just add the path mixer and dsp, and try to match the rest of the /etc/devfs.conf that I have on my laptop...

I do appreciate the replies here... Nothing like a good night's sleep to wake up and see info that gives me ideas! :D
 
Alain De Vos said:
Did you explicitly assign a certain-dataset to a certain-jail ?
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Yep, as per the instructions in that wiki...

I have to say, I followed those instructions pretty blindly, and there's a good chance that my lack of knowledge about jails (and correlating them to the ZFS datasets) made me lose track of something.
 
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