After some more testing I thought it would be good to put this into production
for my personal server. I've used pvhvm_v19 and built it without debugging
options and installed it on a FreeBSD 9.1 system.
I've run into some hiccups with 9.1 user land and a 10-CURRENT kernel, but
that's all solvable.
My VPS has some very limited memory (256M), but I've compensated with swap
Now anytime I'm putting the system under stress, by building ports or by
running a git clone on the kernel repository here, I'm seeing a lot of messages
> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 132545, size: 4096
The system also becomes very sluggish and sometimes unresponsive.
The weird thing was that one of these messages happened right after a reboot
when I rebuilt an outdated port and on the main console was checking the swap
> jeroen:~/ $ swapinfo
> Device 1K-blocks Used Avail Capacity
> /dev/ada0p2 524288 2484 521804 0%
> /dev/md0 1048576 2364 1046212 0%
> Total 1572864 4848 1568016 0%
> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 131424, size: 4096
Is anyone else seeing something similar?
I certainly did not experience something like this on 9.0 with a XENHVM kernel.
If necessary I can rebuild a kernel with debugging support and do some more
recording of what is actually going on.
: I have edited bsd.port.mk to always apply the FBSD10_FIX, and for version
checking I am running "pkg version" with UNAME_r=9.1-RELEASE.
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