A CentOS 6.9 domU with kernel 2.6.32-696.18.7.el6.x86_64 also fails to boot on a CentOS 6.9 dom0 with kernel 4.9.63-29.el6.x86_64 and xen 4.4.4-34.el6.x86_64 Xen logs lines like these (among others): /var/log/xen/xend.log:[2018-01-05 17:55:45 2357] WARNING (XendDomainInfo:583) Could not unpause blktap disk: ('unpause', '-p11520', '-m4') failed (5632 ) /var/log/messages:Jan 5 17:55:45 xvm16n00 tapdisk[11520]: tap-err:tapdisk_vbd_resume: resume request for unpaused vbd aio:/dev/VolGroup/Volume Xenctx for vCPU 0 says: [root at dom0 ~] # /usr/lib64/xen/bin/xenctx -s System.map-2.6.32-696.18.7.el6.x86_64 13 0 rip: ffffffff812b7872 __memcpy_fromio+0x12 flags: 00001202 i nz rsp: ffffffff81a03e00 rax: 0000000000000000 rcx: 0000000000000004 rdx: 0000000000000010 rbx: ffffffffff400000 rsi: ffffffffff400000 rdi: ffffffff81a03e68 rbp: ffffffff81a03e48 r8: 0000000000000000 r9: 0000000000007ff0 r10: 0000000000000000 r11: 0000000000000000 r12: ffffffff81a03e58 r13: ffffffffff400000 r14: ffffffffff410000 r15: ffffffff81a03e68 cs: e033 ss: e02b ds: 0000 es: 0000 fs: 0000 @ 0000000000000000 gs: 0000 @ ffffffff81c25000/0000000000000000 Code (instr addr ffffffff812b7872) 00 00 00 55 48 89 e5 e8 57 e8 29 00 89 d2 48 89 d1 48 c1 e9 02 <f3> a5 f6 c2 02 74 02 66 a5 f6 c2 Stack: 0000000000000004 0000000000000000 0000000000000000 ffffffff812b7872 000000010000e030 0000000000010002 ffffffff81a03e48 000000000000e02b ffffffff812b7869 ffffffff81a03eb8 ffffffff81c80153 0000000000000000 0000000000000000 ffffffff81a03e98 ffffffff81c872a0 0000000000000000 Call Trace: [<ffffffff812b7872>] __memcpy_fromio+0x12 <-- [<ffffffff812b7872>] __memcpy_fromio+0x12 [<ffffffff812b7869>] __memcpy_fromio+0x9 [<ffffffff81c80153>] dmi_scan_machine+0x139 [<ffffffff81c45605>] setup_arch+0x424 [<ffffffff8107e0ee>] vprintk_default+0xe [<ffffffff8154b0cd>] printk+0x4f [<ffffffff81c3fdda>] start_kernel+0xdc [<ffffffff81c3f33a>] x86_64_start_reservations+0x125 [<ffffffff81c4309c>] xen_start_kernel+0x4fe And my domU has similar boot messages as Sarah Newman's: (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 root=/dev/xvda3 rd_NO_LUKS rd_NO_LVM rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto LANG=en_US.UTF-8 KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM earlyprintk=xen (hd0,0)/grub/menu.lst (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 - 0000000100000000 (usable) (early) bootconsole [xenboot0] enabled El Viernes 05/01/2018 a las 05:39, Sarah Newman escribió: > 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 -- Ricardo J. Barberis Usuario Linux Nº 250625: http://counter.li.org/ Usuario LFS Nº 5121: http://www.linuxfromscratch.org/ Senior SysAdmin / IT Architect - www.DonWeb.com