FYI, we noticed the following commit: commit: 25e6871840b6763ca0b668121bfaa89cdf9641da ("proc-mm-export-pte-sizes-directly-in-smaps-v3") git://git.cmpxchg.org/linux-mmotm.git master in testcase: boot on test machine: qemu-system-i386 -enable-kvm -smp 2 -m 256M caused below changes: +---------------------------------------------+------------+------------+ | | 9de3d897be | 25e6871840 | +---------------------------------------------+------------+------------+ | boot_successes | 9 | 0 | | boot_failures | 3 | 10 | | invoked_oom-killer:gfp_mask=0x | 3 | 1 | | Mem-Info | 3 | 1 | | WARNING:at_mm/hugetlb.c:#hugetlb_add_hstate | 0 | 10 | | calltrace:hugetlb_init | 0 | 10 | +---------------------------------------------+------------+------------+ [ 0.729449] PCI: PCI BIOS revision 2.10 entry at 0xfd40f, last bus=0 [ 0.732739] PCI: Using configuration type 1 for base access [ 0.806061] ------------[ cut here ]------------ [ 0.807626] WARNING: CPU: 0 PID: 1 at mm/hugetlb.c:2918 hugetlb_add_hstate+0x1bc/0x1d2 [ 0.813914] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.0-rc7-mm1-00085-g25e6871 #1 [ 0.817604] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 0.825258] cf4afea0 cc0201ab 00000000 cd8cd7a8 cf4afeb8 cb88ce88 00000b66 cdaddf20 [ 0.832788] 00001000 cdade1f8 cf4afecc cb88cfa5 00000009 00000000 00000000 cf4afee8 [ 0.839646] cd8cd7a8 0000000a 00400000 cd8cd98e ffffffff 00000000 cf4aff28 cd8cda28 [ 0.846827] Call Trace: [ 0.848368] [<cc0201ab>] dump_stack+0x138/0x189 [ 0.852578] [<cd8cd7a8>] ? hugetlb_add_hstate+0x1bc/0x1d2 [ 0.855175] [<cb88ce88>] __warn+0x139/0x17a [ 0.857916] [<cb88cfa5>] warn_slowpath_null+0x2d/0x40 [ 0.861148] [<cd8cd7a8>] hugetlb_add_hstate+0x1bc/0x1d2 [ 0.864766] [<cd8cd98e>] ? hugetlb_nrpages_setup+0x131/0x131 [ 0.867837] [<cd8cda28>] hugetlb_init+0x9a/0x8d3 [ 0.870348] [<cb9b862e>] ? list_add_tail_rcu+0x1b/0x2b [ 0.874638] [<cb9b8dda>] ? bdi_init+0x3c2/0x3da [ 0.877176] [<cd8c95be>] ? bdi_class_init+0x92/0x92 [ 0.880116] [<cd8cd98e>] ? hugetlb_nrpages_setup+0x131/0x131 [ 0.884581] [<cd895901>] do_one_initcall+0x10e/0x21a [ 0.887170] [<cb8b8653>] ? parse_args+0x487/0x637 [ 0.890154] [<cd895db8>] ? kernel_init_freeable+0x3ab/0x54f [ 0.894558] [<cd895de2>] kernel_init_freeable+0x3d5/0x54f [ 0.897170] [<ccc7421f>] ? rest_init+0x107/0x107 [ 0.900030] [<ccc74235>] kernel_init+0x16/0x248 [ 0.903505] [<ccc7d8b7>] ret_from_fork+0x1b/0x28 [ 0.906086] ---[ end trace f68b46dee15965b3 ]--- [ 0.907643] HugeTLB registered 4 MB page size, pre-allocated 0 pages [ 0.941737] raid6: mmxx1 gen() 417 MB/s To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Kernel Test Robot