r334533 renders head unbootable on XenServer 7.4

[Trond Endrestøl]

After trial and error, I found r334533 to be responsible for rendering
head unbootable on XenServer 7.4. Neither of the two available
XenServer patches has been applied on the host server.

Normal and verbose boot messages stops non-deterministically at:

hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0

Or at:

granttable0: <Xen Grant-table Device> on xenpv0

This is on a non-critical VM, but I think this issue should be
resolved by the time stable/12 becomes available, or if stable/11
will be impacted by a MFH of r334533 in the near future.

The host server will be upgraded to XenServer 7.5 by the end of the
week, in case that makes the issue go away.

[Mateusz Guzik]

On Wed, Jun 6, 2018 at 6:50 PM, Trond Endrestøl <

Post by Trond Endrestøl
After trial and error, I found r334533 to be responsible for rendering
head unbootable on XenServer 7.4. Neither of the two available
XenServer patches has been applied on the host server.
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
granttable0: <Xen Grant-table Device> on xenpv0
This is on a non-critical VM, but I think this issue should be
resolved by the time stable/12 becomes available, or if stable/11
will be impacted by a MFH of r334533 in the near future.
The host server will be upgraded to XenServer 7.5 by the end of the
week, in case that makes the issue go away.

Thanks for the report. Next time if you identify the culprit please cc:
the committer - not everyone watches mailing lists too closely.

I set it up on FreeBSD as dom0 and verified the problem exists.
I fixed it with the following:
https://svnweb.freebsd.org/changeset/base/334820

[Trond Endrestøl]

Post by Mateusz Guzik
the committer - not everyone watches mailing lists too closely.

Wilco.

Post by Mateusz Guzik
I set it up on FreeBSD as dom0 and verified the problem exists.
https://svnweb.freebsd.org/changeset/base/334820

Thanks. I'll try to build r334820+.