amd64/123936: Swap problem?

[Stefan `Sec` Zehl]

>Number:         123936
>Category:       amd64
>Synopsis:       Swap problem?
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri May 23 17:20:00 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Stefan `Sec` Zehl
>Release:        FreeBSD 7.0-STABLE amd64
>Organization:
>Environment:
System: FreeBSD ice 7.0-STABLE FreeBSD 7.0-STABLE #13: Thu May 8 15:00:23 CEST 2008 root at ice:/usr/obj/usr/src/sys/ICE amd64


	
>Description:

My FreeBSD-7.0-STABLE amd64 machine had some strange swap problems today.

/var/log/messages shows these messages:

| May 23 10:59:07 ice kernel: swap_pager_getswapspace(16): failed
| May 23 10:59:07 ice kernel: swap_pager_getswapspace(8): failed
| May 23 10:59:07 ice kernel: swap_pager_getswapspace(16): failed
| May 23 10:59:07 ice kernel: swap_pager_getswapspace(12): failed
| May 23 10:59:07 ice kernel: swap_pager_getswapspace(16): failed
| May 23 10:59:07 ice kernel: swap_pager_getswapspace(12): failed
| May 23 10:59:07 ice kernel: swap_pager_getswapspace(16): failed
| [....]
until two processes were killed

| May 23 10:59:11 ice kernel: pid 52947 (named), uid 53, was killed: out of swap s

After that, these messages stopped.

The disk itself appears to be ok -- smartctl lists no problems(did also run a
smartctl -t short run), and a dd can read the entire swap device without
problems.

I have encrypted my swap by having the following line in my /etc/fstab:
|/dev/ad4s1b.eli         none            swap    sw              0       0

swapinfo confirms this:
| Device          1K-blocks     Used    Avail Capacity
| /dev/ad4s1b.eli   1441088   188852  1252236    13%

Is there any known issue with encrypted swap? And do the numbers in
"getspace(xx)" signify anyting? Is there any additional information needed?

>How-To-Repeat:
	
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: