[CentOS-virt] Centos 6 2.6.32-696.18.7.el6.x86_64 does not boot in Xen PV mode

Fri Jan 5 08:39:21 UTC 2018
Sarah Newman <srn at prgmr.com>

Problems start before any of the kaiser code executes, though it could still be related to CONFIG_KAISER since that has effects beyond kaiser.c.

---
(early) Initializing cgroup subsys cpuset
(early) Initializing cgroup subsys cpu
(early) Linux version 2.6.32-696.18.7.el6.x86_64 (mockbuild at c1bl.rdu2.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) ) #1 SMP Thu
Jan 4 17:31:22 UTC 2018
(early) Command line: ro console=hvc0 rootflags=barrier=0 crashkernel=auto SYSFONT=latarcyrheb-sun16 LANG=en_US.UTF-8 KEYTABLE=us earlyprintk=xen
(early) KERNEL supported cpus:
(early)   Intel GenuineIntel
(early)   AMD AuthenticAMD
(early)   Centaur CentaurHauls
(early) 1 multicall(s) failed: cpu 0
(early) Pid: 0, comm: swapper Not tainted 2.6.32-696.18.7.el6.x86_64 #1
(early) Call Trace:
(early)  [<ffffffff81004843>] ? xen_mc_flush+0x1c3/0x250
(early)  [<ffffffff81006b9e>] ? xen_extend_mmu_update+0xde/0x1b0
(early)  [<ffffffff81006fcd>] ? xen_set_pmd_hyper+0x9d/0xc0
(early)  [<ffffffff81c5e8ac>] ? early_ioremap_init+0x98/0x133
(early)  [<ffffffff81c45221>] ? setup_arch+0x40/0xca6
(early)  [<ffffffff8107e0ee>] ? vprintk_default+0xe/0x10
(early)  [<ffffffff8154b0cd>] ? printk+0x4f/0x52
(early)  [<ffffffff81c3fdda>] ? start_kernel+0xdc/0x43b
(early)  [<ffffffff81c47eb0>] ? reserve_early+0x30/0x39
(early)  [<ffffffff81c3f33a>] ? x86_64_start_reservations+0x125/0x129
(early)  [<ffffffff81c4309c>] ? xen_start_kernel+0x4fe/0x505
(early) ------------[ cut here ]------------
(early) WARNING: at arch/x86/xen/multicalls.c:182 xen_mc_flush+0x21f/0x250() (Not tainted)
(early) Modules linked in:
(early) Pid: 0, comm: swapper Not tainted 2.6.32-696.18.7.el6.x86_64 #1
(early) Call Trace:
(early)  [<ffffffff8107ce81>] ? warn_slowpath_common+0x91/0xe0
(early)  [<ffffffff8100762f>] ? __raw_callee_save_xen_restore_fl+0x11/0x1e
(early)  [<ffffffff8107ceea>] ? warn_slowpath_null+0x1a/0x20
(early)  [<ffffffff8100489f>] ? xen_mc_flush+0x21f/0x250
(early)  [<ffffffff81006b9e>] ? xen_extend_mmu_update+0xde/0x1b0
(early)  [<ffffffff81006b9e>] ? xen_extend_mmu_update+0xde/0x1b0
(early)  [<ffffffff81006fcd>] ? xen_set_pmd_hyper+0x9d/0xc0
(early)  [<ffffffff81c5e8ac>] ? early_ioremap_init+0x98/0x133
(early)  [<ffffffff81c45221>] ? setup_arch+0x40/0xca6
(early)  [<ffffffff8107e0ee>] ? vprintk_default+0xe/0x10
(early)  [<ffffffff8154b0cd>] ? printk+0x4f/0x52
(early)  [<ffffffff81c3fdda>] ? start_kernel+0xdc/0x43b
(early)  [<ffffffff81c47eb0>] ? reserve_early+0x30/0x39
(early)  [<ffffffff81c3f33a>] ? x86_64_start_reservations+0x125/0x129
(early)  [<ffffffff81c4309c>] ? xen_start_kernel+0x4fe/0x505
(early) ---[ end trace a7919e7f17c0a725 ]---
(early) ACPI in unprivileged domain disabled
(early) released 0 pages of unused memory
(early) BIOS-provided physical RAM map:
(early)  Xen: 0000000000000000 - 00000000000a0000 (usable)
(early)  Xen: 00000000000a0000 - 0000000000100000 (reserved)
(early)  Xen: 0000000000100000 - 0000000020000000 (usable)
(early) bootconsole [xenboot0] enabled