Issue #3187 has been updated by t_dfbsd.

This issue is not limited to hammer1. I've replaced all but one of my disks 
with SSDs all my volumes are hammer2 now and I've seen this same thing happen 3 
times since then. Twice it appeared to happen during the nightly cleanup, but 
once was during the day with only moderated disk activity. This is a lot less 
ferquently than when using hammer1, so it's going to be even more difficult to 
track down.

Bug #3187: Kernel: multiple swap pager messages during hammer cleanup

* Author: t_dfbsd
* Status: New
* Priority: High
* Assignee: dillon
* Category: 
* Target version: 
On master, commit a19800f223, running hammer cleanup causes dozens of messages 
like this and causes the machine to become inaccessible by network services, 
SSH in particular, although ping still works:

May 23 19:20:14 <kern.crit> boojum kernel: swap_pager: indefinite wait buffer:  
bp 0xfffff800735334d8 offset: 5092941824, size: 4096  m=0xfffff8005fee7580 
busy=e0000000 flags=00004080

This behavior was also observed at commit d29a2431b3, so whatever is causing it 
is probably earlier than that. When I ran hammer cleanup today, the last thing 
I noticed running before my SSH connection died was hammer reblock-btree. This 
was on a 8TB encrypted volume.

dmesg.boot (88 KB)
fstab (976 Bytes)

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