I run the latest RHEL 7.2 with the KAISER/KPTI patch, and boot failed.
...
[ 0.000000] PM: Registered nosave memory: [mem 0x81000000000-0x8ffffffffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x91000000000-0xfffffffffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x101000000000-0x10ffffffffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x111000000000-0x17ffffffffff]
[ 0.000000] PM: Regitered nosave memory: [mem 0x181000000000-0x18ffffffffff]
[ 0.000000] e820: [mem 0x90000000-0xfed1bfff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on bare hardware
[ 0.000000] setup_percpu: NR_CPUS:5120 nr_cpumask_bits:1536 nr_cpu_ids:1536
nr_node_ids:8
[ 0.000000] PERCPU: max_distance=0x180ffe240000 too large for vmalloc space
0x1fffffffffff
[ 0.000000] setup_percpu: auto allocator failed (-22), falling back to page
size
[ 0.000000] PERCPU: 32 4K pages/cpu @ffffc90000000000 s107200 r8192 d15680
[ 0.000000] Built 8 zonelists in Zone order, mobility grouping on. Total
pages: 132001804
[ 0.000000] Policy zone: Normal
iosdevname=0 8250.nr_uarts=8 efi=old_map rdloaddriver=usb_storage
rdloaddriver=sd_mod udev.event-timeout=600 softlockup_panic=0
rcupdate.rcu_cpu_stall_timeout=300
[ 0.000000] Intel-IOMMU: enabled
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] x86/fpu: xstate_offset[2]: 0240, xstate_sizes[2]: 0100
[ 0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340
[ 0.000000] AGP: Checking aperture...
[ 0.000000] AGP: No AGP bridge found
[ 0.000000] Memory: 526901612k/26910638080k available (6528k kernel code,
26374249692k absent, 9486776k reserved, 4302k data, 1676k init)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1536, Nodes=8
[ 0.000000] x86/pti: Unmapping kernel while in userspace
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=1536.
[ 0.000000] Offload RCU callbacks from all CPUs
[ 0.000000] Offload RCU callbacks from CPUs: 0-1535.
[ 0.000000] NR_IRQS:327936 nr_irqs:15976 0
[ 0.000000] Console: colour dummy device 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] console [ttyS0] enabled
[ 0.000000] allocated 2145910784 bytes of page_cgroup
[ 0.000000] please try 'cgroup_disable=memory' option if you don't want
memory cgroups
[ 0.000000] Enabling automatic NUMA balancing. Configure with
numa_balancing= or the kernel.numa_balancing sysctl
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 2799.999 MHz processor
[ 0.001803] Calibrating delay loop (skipped), value calculated using timer
frequency.. 5599.99 BogoMIPS (lpj=2799999)
[ 0.012408] pid_max: default: 1572864 minimum: 12288
[ 0.017987] init_memory_mapping: [mem 0x5947f000-0x5b47efff]
[ 0.023701] init_memory_mapping: [mem 0x5b47f000-0x5b87efff]
[ 0.029369] init_memory_mapping: [mem 0x6d368000-0x6d3edfff]
[ 0.039130] BUG: unable to handle kernel paging request at 000000005b835f90
[ 0.046101] IP: [<000000005b835f90>] 0x5b835f8f
[ 0.050637] PGD 8000000001f61067 PUD 190ffefff067 PMD 190ffeffd067 PTE
5b835063
[ 0.057989] Oops: 0011 [#1] SMP
[ 0.061241] Modules linked in:
[ 0.064304] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
3.10.0-327.59.59.46.h42.x86_64 #1
[ 0.072280] Hardware name: Huawei FusionServer9032/IT91SMUB, BIOS BLXSV316
11/14/2017
[ 0.080082] task: ffffffff8196e440 ti: ffffffff81958000 task.ti:
ffffffff81958000
[ 0.087539] RIP: 0010:[<000000005b835f90>] [<000000005b835f90>] 0x5b835f8f
[ 0.094494] RSP: 0000:ffffffff8195be28 EFLAGS: 00010046
[ 0.099788] RAX: 0000000080050033 RBX: ffff910fbc802000 RCX: 00000000000002d0
[ 0.106897] RDX: 0000000000000030 RSI: 00000000000002d0 RDI: 000000005b835f90
[ 0.114006] RBP: ffffffff8195bf38 R08: 0000000000000001 R09: 0000090fbc802000
[ 0.121116] R10: ffff88ffbcc07340 R11: 0000000000000001 R12: 0000000000000001
[ 0.128225] R13: 0000090fbc802000 R14: 00000000000002d0 R15: 0000000000000001
[ 0.135336] FS: 0000000000000000(0000) GS:ffffc90000000000(0000)
knlGS:0000000000000000
[ 0.143398] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.149124] CR2: 000000005b835f90 CR3: 0000000001966000 CR4: 00000000000606b0
[ 0.156234] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 0.163344] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 0.170454] Call Trace:
[ 0.172899] [<ffffffff8107512c>] ? efi_call4+0x6c/0xf0
[ 0.178108] [<ffffffff8105b3fe>] ? native_flush_tlb_global+0x8e/0xc0
[ 0.184527] [<ffffffff810652b3>] ? set_memory_x+0x43/0x50
[ 0.189997] [<ffffffff81acf91f>] ? efi_enter_virtual_mode+0x3bc/0x538
[ 0.196505] [<ffffffff81ab104b>] start_kernel+0x39f/0x44f
[ 0.201972] [<ffffffff81ab0ab5>] ? repair_env_string+0x5c/0x5c
[ 0.207872] [<ffffffff81ab0120>] ? early_idt_handlers+0x120/0x120
[ 0.214030] [<ffffffff81ab066c>] x86_64_start_reservations+0x2a/0x2c
[ 0.220449] [<ffffffff81ab07c0>] x86_64_start_kernel+0x152/0x175
[ 0.226521] Code: Bad RIP value.
[ 0.229860] RIP [<000000005b835f90>] 0x5b835f8f
[ 0.234478] RSP <ffffffff8195be28>
[ 0.237955] CR2: 000000005b835f90
[ 0.241266] ---[ end trace 8178226af3e802ca ]---
[ 0.245869] Kernel panic - not syncing: Fatal exception
