intr using Swap

[Efraín Déctor]

Hello.

This past few days, on a dedicated server I'm seeing that swap space is 
being used while there are plenty of RAM to be used:

Mem: 14G Active, 39G Inact, 7723M Wired, 504M Cache, 1864M Buf, 593M Free
Swap: 8192M Total, 1567M Used, 6625M Free, 19% Inuse, 108K In

After investigating, I swa that the process using swap is intr:

Result of ps ax | grep W:
12  -  WL       937:48.07 [intr]

uname -a:
FreeBSD edh.hyrule.mx 10.1-RELEASE-p24 FreeBSD 10.1-RELEASE-p24 #0: Mon 
Nov  2 12:17:28 UTC 2015 
root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64

Is there any reason for intr to be using swap space? Is this normal?

Thanks in advance.