Hi all,
Recently, I am testing the TMEM support on Xen. I discovered that when
enabled TMEM in ubuntu 14.10 as guest on Xen 4.1 & Xen 4.3, "xm save" & "xm
restore“ failed after there are more than 1000 pages put in persistent pool
of TMEM in Xen. My operations are list as follows:
In ubuntu guest (8 cores , 8GB):
sudo modprobe tmem
(than wait for the selfballoon to finish)
dd if=/dev/zero of=/tmp/test.img bs=10M count=1000
dd if=/tmp/test.img of=/dev/null bs=10M
dd if=/tmp/test.img of=/dev/null bs=10M
.........
(until more than 1000 pages put in persistent pool)
In Domain 0:
(add tmem in grub.cfg)
xm save ubuntu test.save
xm restore ubuntu test.save
When TMEM is not enabled, save & restore success after these operations.
But if TMEM is enabled, save & restore fail.
Does anyone test about save & restore when enabled TMEM in Xen?? Is there
anything I do wrong?
Thanks!!
Best Regards,
Yunfang
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