From owner-freebsd-fs@freebsd.org  Sat Jul 25 11:28:42 2015
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Date: Sat, 25 Jul 2015 13:28:41 +0200
Message-ID: <CAAVO5+KX2f4B=bZi-1OKezhDJk668VNmx-rteXAaPf4EEThNYQ@mail.gmail.com>
Subject: ZFS related panic: Memory modified after free
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Hi FreeBSD-fs,

I have installed last devel snapshot  from
FreeBSD-11.0-CURRENT-amd64-20150722-r285794, with the following
settings:

* ZFS guided
* ZFS encrypted option enable (GELI)


I have only added the following tunables to /boot/loader.conf:

i915kms_load="YES"
vfs.zfs.arc_max="1024M"


Yes, I have limited the ARC cache to 1G, as the system makes a lot of
swapping when you leave the default setting.

Under this scenario, the panic is easily reproducible when the system
is stressed by running a buildworld, and doing some more activity, as
"du -hs /usr/ports" and surfing the web.

Hardware is somewhat ancient and outdated (Dell Latitude D630, 4G RAM).

Full details here:

http://pastebin.com/raw.php?i=vHk6GLy6


If you needed, I can submit a bug report, but before to do that, I
need to make sure that the panic is not related to my specific
hardware or my ARC setting.

Best regards.