[DragonFlyBSD - Bug #2365] Hammer pfs-destroy and prune-everything can cause network loss

[Sascha Wildner via Redmine]

Issue #2365 has been updated by Sascha Wildner.

File indefinite_wait_buffer.png added
File indefinite_wait_buffer2.png added
File indefinite_wait_buffer3.png added

I just had the "indefinite wait buffer" in an i386 VM and I captured the beginnings of it. I was building in pkgsrc and then thought I should cleanup my HAMMER so I ran /etc/periodic/daily/160.clean-hammer and it went fine until it got to /home (second image). Although nothing of the package building took place on /home (afaics) it hung there and soon the "indefinite wait buffer" messages started to appear on the console (first image). First the offsets were all the same but later on it was several (third image).

Maybe this gives some better clue? So far I had never witnessed it when it happened.


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Bug #2365: Hammer pfs-destroy and prune-everything can cause network loss
http://bugs.dragonflybsd.org/issues/2365

Author: Tim Darby
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


Fairly consistently, when I run hammer prune-everything, at some point in the process my ssh session will stop and not recover and the machine becomes unavailable on the network.  It eventually returns to normal and I can reconnect to it.  Today, I ran a hammer pfs-destroy on a 1.3TB pfs and the same thing happened.  While the network was out, it was putting these messages in the log:

swap_pager: indefinite wait buffer:  offset: 6489661440, size: 4096
swap_pager: indefinite wait buffer:  offset: 23187279872, size: 4096
swap_pager: indefinite wait buffer:  offset: 6642294784, size: 4096
swap_pager: indefinite wait buffer:  offset: 6536355840, size: 4096
swap_pager: indefinite wait buffer:  offset: 6500122624, size: 4096
swap_pager: indefinite wait buffer:  offset: 6489661440, size: 4096
swap_pager: indefinite wait buffer:  offset: 6725648384, size: 4096
swap_pager: indefinite wait buffer:  offset: 23187279872, size: 4096
swap_pager: indefinite wait buffer:  offset: 6642294784, size: 4096
swap_pager: indefinite wait buffer:  offset: 6536355840, size: 4096
swap_pager: indefinite wait buffer:  offset: 6500122624, size: 4096
swap_pager: indefinite wait buffer:  offset: 861982720, size: 4096
swap_pager: indefinite wait buffer:  offset: 6489661440, size: 4096
swap_pager: indefinite wait buffer:  offset: 6725648384, size: 4096
swap_pager: indefinite wait buffer:  offset: 23187279872, size: 4096
swap_pager: indefinite wait buffer:  offset: 6642294784, size: 4096
swap_pager: indefinite wait buffer:  offset: 1027108864, size: 4096
swap_pager: indefinite wait buffer:  offset: 6536355840, size: 4096
swap_pager: indefinite wait buffer:  offset: 6500122624, size: 4096


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