FYI, we noticed the below changes on git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master commit a9730fca9946f3697410479e0ef1bd759ba00a77 ("Fix kmalloc slab creation sequence") +--------------------------------------------------+------------+------------+ > | 88793e5c77 | a9730fca99 | +--------------------------------------------------+------------+------------+ > boot_successes | 0 | 543 | > boot_failures | 594 | 37 | > kernel_BUG_at_mm/slab.c | 594 | | > invalid_opcode | 594 | | > RIP:__kmem_cache_create | 594 | | > Kernel_panic-not_syncing:Fatal_exception | 594 | | > backtrace:create_kmalloc_caches | 594 | | > backtrace:kmem_cache_init | 594 | | > Out_of_memory:Kill_process | 0 | 5 | > WARNING:at_drivers/block/floppy.c:#schedule_bh() | 0 | 1 | > backtrace:do_mount | 0 | 1 | > backtrace:compat_SyS_mount | 0 | 1 | > WARNING:at_kernel/trace/ftrace.c:#ftrace_bug() | 0 | 31 | > backtrace:perf_ftrace_event_register | 0 | 31 | > backtrace:perf_trace_init | 0 | 31 | > backtrace:perf_tp_event_init | 0 | 31 | > backtrace:perf_try_init_event | 0 | 31 | > backtrace:perf_init_event | 0 | 31 | > backtrace:SYSC_perf_event_open | 0 | 31 | > backtrace:SyS_perf_event_open | 0 | 31 | +--------------------------------------------------+------------+------------+ The commit fixed a boot failure as below in old_dmesg.xz: [ 0.000000] ------------[ cut here ]------------ [ 0.000000] kernel BUG at mm/slab.c:2276! [ 0.000000] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.1.0-11343-g88793e5 #113 [ 0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 0.000000] task: ffffffff8401b580 ti: ffffffff84000000 task.ti: ffffffff84000000 [ 0.000000] RIP: 0010:[] [] __kmem_cache_create+0x324/0x375 [ 0.000000] RSP: 0000:ffffffff84003e38 EFLAGS: 00010087 [ 0.000000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 0.000000] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000 [ 0.000000] RBP: ffffffff84003e98 R08: 0000000000001000 R09: 0000000000000001 [ 0.000000] R10: 0000000000000040 R11: ffffffffffffffc0 R12: ffff880033006f80 [ 0.000000] R13: 0000000000000000 R14: 0000000080000000 R15: 0000000000000040 [ 0.000000] FS: 0000000000000000(0000) GS:ffff880033600000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 0.000000] CR2: ffff8800339ff000 CR3: 0000000004014000 CR4: 00000000000006b0 [ 0.000000] Stack: [ 0.000000] ffffffff84003e48 0000000000000000 0000000080000000 0000000000001001 [ 0.000000] 0000000100000046 0000000000000001 0000000000008000 ffff880033006f80 [ 0.000000] 0000000000000060 ffffffff83a9c2fa 0000000000002000 0000ffffffff8464 [ 0.000000] Call Trace: [ 0.000000] [] create_boot_cache+0x3c/0x66 [ 0.000000] [] create_kmalloc_cache+0x4f/0x79 [ 0.000000] [] create_kmalloc_caches+0x44/0xe5 [ 0.000000] [] kmem_cache_init+0x155/0x159 [ 0.000000] [] ? console_unlock+0x3fe/0x42d [ 0.000000] [] start_kernel+0x213/0x473 [ 0.000000] [] ? early_idt_handler_array+0x120/0x120 [ 0.000000] [] x86_64_start_reservations+0x2a/0x2c [ 0.000000] [] x86_64_start_kernel+0x12d/0x13c [ 0.000000] Code: 44 24 2c e8 24 b2 57 00 4d 85 f6 49 89 44 24 18 48 8b 4d c8 74 17 31 f6 48 89 cf e8 d5 53 fd ff 48 83 f8 10 49 89 44 24 40 77 02 <0f> 0b 44 89 ee 4c 89 e7 e8 84 d4 c4 01 89 c3 31 c0 85 db 74 2d [ 0.000000] RIP [] __kmem_cache_create+0x324/0x375 [ 0.000000] RSP [ 0.000000] ---[ end trace 5f21f6be99044392 ]--- [ 0.000000] Kernel panic - not syncing: Fatal exception Thanks, Ying Huang