Re: Xen CentOS 7.3 server + CentOS 7.3 VM fails to boot after CR updates (applied to VM)!

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On 09/01/2017 02:41 PM, Kevin Stange wrote:
> On 08/31/2017 07:50 AM, PJ Welsh wrote:
>> A recently created and fully functional CentOS 7.3 VM fails to boot
>> after applying CR updates:
> <snip>
>> Server OS is CentOS 7.3 using Xen (no CR updates):
>> rpm -qa xen\*
>> xen-hypervisor-4.6.3-15.el7.x86_64
>> xen-4.6.3-15.el7.x86_64
>> xen-licenses-4.6.3-15.el7.x86_64
>> xen-libs-4.6.3-15.el7.x86_64
>> xen-runtime-4.6.3-15.el7.x86_64
>>
>> uname -a
>> Linux tsxen2.xx.com <http://tsxen2.xx.com> 4.9.39-29.el7.x86_64 #1 SMP
>> Fri Jul 21 15:09:00 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
>>
>> Sadly, the other issue is that the grub menu will not display for me to
>> select another kernel to see if it is just a kernel issue.
>>
>> The dracut prompt does not show any /dev/disk folder either.
>>
> 
> I'm seeing this as well.  My host is 4.9.44-29 and Xen 4.4.4-26 from
> testing repo, my guest is 3.10.0-693.1.1.  Guest boots fine with
> 514.26.2.  The kernel messages that appear to kick off the failure for
> me start with a page allocation failure.  It eventually reaches dracut
> failures due to systemd/udev not setting up properly, but I think the
> root is this:
> 
> [    1.970630] ------------[ cut here ]------------
> [    1.970651] WARNING: CPU: 2 PID: 225 at mm/vmalloc.c:131
> vmap_page_range_noflush+0x2c1/0x350
> [    1.970660] Modules linked in:
> [    1.970668] CPU: 2 PID: 225 Comm: systemd-udevd Not tainted
> 3.10.0-693.1.1.el7.x86_64 #1
> [    1.970677]  0000000000000000 000000008cddc75d ffff8803e8587bd8
> ffffffff816a3d91
> [    1.970688]  ffff8803e8587c18 ffffffff810879c8 00000083811c14e8
> ffff8800066eb000
> [    1.970698]  0000000000000001 ffff8803e86d6940 ffffffffc0000000
> 0000000000000000
> [    1.970708] Call Trace:
> [    1.970725]  [<ffffffff816a3d91>] dump_stack+0x19/0x1b
> [    1.970736]  [<ffffffff810879c8>] __warn+0xd8/0x100
> [    1.970742]  [<ffffffff81087b0d>] warn_slowpath_null+0x1d/0x20
> [    1.970748]  [<ffffffff811c0781>] vmap_page_range_noflush+0x2c1/0x350
> [    1.970758]  [<ffffffff811c083e>] map_vm_area+0x2e/0x40
> [    1.970765]  [<ffffffff811c1590>] __vmalloc_node_range+0x170/0x270
> [    1.970774]  [<ffffffff810fe754>] ? module_alloc_update_bounds+0x14/0x70
> [    1.970781]  [<ffffffff810fe754>] ? module_alloc_update_bounds+0x14/0x70
> [    1.970792]  [<ffffffff8105f143>] module_alloc+0x73/0xd0
> [    1.970798]  [<ffffffff810fe754>] ? module_alloc_update_bounds+0x14/0x70
> [    1.970804]  [<ffffffff810fe754>] module_alloc_update_bounds+0x14/0x70
> [    1.970811]  [<ffffffff810ff2d2>] load_module+0xb02/0x29e0
> [    1.970817]  [<ffffffff811c0717>] ? vmap_page_range_noflush+0x257/0x350
> [    1.970823]  [<ffffffff811c083e>] ? map_vm_area+0x2e/0x40
> [    1.970829]  [<ffffffff811c1590>] ? __vmalloc_node_range+0x170/0x270
> [    1.970838]  [<ffffffff81101249>] ? SyS_init_module+0x99/0x110
> [    1.970846]  [<ffffffff81101275>] SyS_init_module+0xc5/0x110
> [    1.970856]  [<ffffffff816b4fc9>] system_call_fastpath+0x16/0x1b
> [    1.970862] ---[ end trace 2117480876ed90d2 ]---
> [    1.970869] vmalloc: allocation failure, allocated 24576 of 28672 bytes
> [    1.970874] systemd-udevd: page allocation failure: order:0, mode:0xd2
> [    1.970883] CPU: 2 PID: 225 Comm: systemd-udevd Tainted: G        W
>    ------------   3.10.0-693.1.1.el7.x86_64 #1
> [    1.970894]  00000000000000d2 000000008cddc75d ffff8803e8587c48
> ffffffff816a3d91
> [    1.970910]  ffff8803e8587cd8 ffffffff81188810 ffffffff8190ea38
> ffff8803e8587c68
> [    1.970923]  ffffffff00000018 ffff8803e8587ce8 ffff8803e8587c88
> 000000008cddc75d
> [    1.970939] Call Trace:
> [    1.970946]  [<ffffffff816a3d91>] dump_stack+0x19/0x1b
> [    1.970961]  [<ffffffff81188810>] warn_alloc_failed+0x110/0x180
> [    1.970971]  [<ffffffff811c1654>] __vmalloc_node_range+0x234/0x270
> [    1.970981]  [<ffffffff810fe754>] ? module_alloc_update_bounds+0x14/0x70
> [    1.970989]  [<ffffffff810fe754>] ? module_alloc_update_bounds+0x14/0x70
> [    1.970999]  [<ffffffff8105f143>] module_alloc+0x73/0xd0
> [    1.971031]  [<ffffffff810fe754>] ? module_alloc_update_bounds+0x14/0x70
> [    1.971038]  [<ffffffff810fe754>] module_alloc_update_bounds+0x14/0x70
> [    1.971046]  [<ffffffff810ff2d2>] load_module+0xb02/0x29e0
> [    1.971052]  [<ffffffff811c0717>] ? vmap_page_range_noflush+0x257/0x350
> [    1.971061]  [<ffffffff811c083e>] ? map_vm_area+0x2e/0x40
> [    1.971067]  [<ffffffff811c1590>] ? __vmalloc_node_range+0x170/0x270
> [    1.971075]  [<ffffffff81101249>] ? SyS_init_module+0x99/0x110
> [    1.971081]  [<ffffffff81101275>] SyS_init_module+0xc5/0x110
> [    1.971088]  [<ffffffff816b4fc9>] system_call_fastpath+0x16/0x1b
> [    1.971094] Mem-Info:
> [    1.971103] active_anon:875 inactive_anon:2049 isolated_anon:0
> [    1.971103]  active_file:791 inactive_file:8841 isolated_file:0
> [    1.971103]  unevictable:0 dirty:0 writeback:0 unstable:0
> [    1.971103]  slab_reclaimable:1732 slab_unreclaimable:1629
> [    1.971103]  mapped:1464 shmem:2053 pagetables:480 bounce:0
> [    1.971103]  free:4065966 free_pcp:763 free_cma:0
> [    1.971131] Node 0 DMA free:15912kB min:12kB low:12kB high:16kB
> active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB
> unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15996kB
> managed:15912kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB
> slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB
> pagetables:0kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB
> free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
> [    1.971217] lowmem_reserve[]: 0 4063 16028 16028
> [    1.971226] Node 0 DMA32 free:4156584kB min:4104kB low:5128kB
> high:6156kB active_anon:952kB inactive_anon:1924kB active_file:0kB
> inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB
> present:4177920kB managed:4162956kB mlocked:0kB dirty:0kB writeback:0kB
> mapped:4kB shmem:1928kB slab_reclaimable:240kB slab_unreclaimable:504kB
> kernel_stack:32kB pagetables:592kB unstable:0kB bounce:0kB
> free_pcp:1760kB local_pcp:288kB free_cma:0kB writeback_tmp:0kB
> pages_scanned:0 all_unreclaimable? no
> [    1.971264] lowmem_reserve[]: 0 0 11964 11964
> [    1.971273] Node 0 Normal free:12091564kB min:12088kB low:15108kB
> high:18132kB active_anon:2352kB inactive_anon:6272kB active_file:3164kB
> inactive_file:35364kB unevictable:0kB isolated(anon):0kB
> isolated(file):0kB present:12591104kB managed:12251788kB mlocked:0kB
> dirty:0kB writeback:0kB mapped:5852kB shmem:6284kB
> slab_reclaimable:6688kB slab_unreclaimable:6012kB kernel_stack:880kB
> pagetables:1328kB unstable:0kB bounce:0kB free_pcp:1196kB
> local_pcp:152kB free_cma:0kB writeback_tmp:0kB pages_scanned:0
> all_unreclaimable? no
> [    1.971309] lowmem_reserve[]: 0 0 0 0
> [    1.971316] Node 0 DMA: 0*4kB 1*8kB (U) 0*16kB 1*32kB (U) 2*64kB (U)
> 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) =
> 15912kB
> [    1.971343] Node 0 DMA32: 7*4kB (M) 18*8kB (UM) 7*16kB (EM) 3*32kB
> (EM) 1*64kB (E) 2*128kB (UM) 1*256kB (E) 4*512kB (UM) 4*1024kB (UEM)
> 4*2048kB (EM) 1011*4096kB (M) = 4156348kB
> [    1.971377] Node 0 Normal: 64*4kB (UEM) 10*8kB (UEM) 6*16kB (EM)
> 3*32kB (EM) 3*64kB (UE) 3*128kB (UEM) 1*256kB (E) 2*512kB (UE) 0*1024kB
> 1*2048kB (M) 2951*4096kB (M) = 12091728kB
> [    1.971413] Node 0 hugepages_total=0 hugepages_free=0
> hugepages_surp=0 hugepages_size=2048kB
> [    1.971425] 11685 total pagecache pages
> [    1.971430] 0 pages in swap cache
> [    1.971437] Swap cache stats: add 0, delete 0, find 0/0
> [    1.971444] Free swap  = 0kB
> [    1.971451] Total swap = 0kB
> [    1.971456] 4196255 pages RAM
> [    1.971462] 0 pages HighMem/MovableOnly
> [    1.971467] 88591 pages reserved
> 

Do any of you guys have access to RHEL to try the RHEL 7.4 Kernel?

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