FYI, we noticed the below changes on git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master commit fe4b991dcd84e0104cf2e29223a819335ed048a7 ("iommu: add self-consistency tests to ARM LPAE IO page table allocator") +--------------------------------------------------------------------+------------+------------+ | | e1d3c0fd70 | fe4b991dcd | +--------------------------------------------------------------------+------------+------------+ | boot_successes | 0 | 0 | | boot_failures | 80 | 20 | | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 31 | 1 | | backtrace:async_run_entry_fn | 7 | | | backtrace:serio_handle_event | 23 | 1 | | backtrace:do_fork | 1 | | | backtrace:kthreadd | 1 | | | WARNING:at_net/netlink/genetlink.c:#genl_unbind() | 49 | 19 | | backtrace:do_group_exit | 49 | 19 | | backtrace:SyS_exit_group | 49 | 19 | | backtrace:SYSC_socketcall | 19 | 9 | | backtrace:SyS_socketcall | 19 | 9 | | WARNING:at_drivers/iommu/io-pgtable-arm.c:#__arm_lpae_unmap() | 0 | 20 | | WARNING:at_drivers/iommu/io-pgtable-arm.c:#arm_lpae_do_selftests() | 0 | 20 | | backtrace:arm_lpae_do_selftests | 0 | 20 | | backtrace:kernel_init_freeable | 0 | 20 | +--------------------------------------------------------------------+------------+------------+ [ 0.670018] arm-lpae io-pgtable: selftest: pgsize_bitmap 0x40201000, IAS 36 [ 0.671681] arm-lpae io-pgtable: selftest: pgsize_bitmap 0x40201000, IAS 40 [ 0.673002] ------------[ cut here ]------------ [ 0.673352] WARNING: CPU: 0 PID: 1 at drivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0xa8/0x321() [ 0.675487] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-05185-g8bd9653 #524 [ 0.676672] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 0.677979] 00000000 00000000 d4485e08 c153abb9 00000000 d4485e24 c103a2e1 0000019d [ 0.680005] c12e41c0 d454aab0 00000000 00000000 d4485e34 c103a37e 00000009 00000000 [ 0.682517] d4485e90 c12e41c0 00000080 80000000 d4485ed0 0000000c d462b000 00600000 [ 0.685218] Call Trace: [ 0.686123] [] dump_stack+0x48/0x60 [ 0.686685] [] warn_slowpath_common+0x7a/0x91 [ 0.687886] [] ? __arm_lpae_unmap+0xa8/0x321 [ 0.688868] [] warn_slowpath_null+0xf/0x13 [ 0.690007] [] __arm_lpae_unmap+0xa8/0x321 [ 0.691101] [] ? arm_lpae_map+0xa4/0xaf [ 0.692091] [] arm_lpae_unmap+0x1b/0x35 [ 0.693122] [] arm_lpae_do_selftests+0x1e0/0x394 [ 0.693340] [] ? arm_lpae_dump_ops+0x37/0x37 [ 0.694608] [] do_one_initcall+0x177/0x18a [ 0.695832] [] ? repair_env_string+0x12/0x54 [ 0.696676] [] ? do_early_param+0x1e/0x73 [ 0.697754] [] ? parse_args+0x28b/0x38c [ 0.699048] [] ? initcall_blacklist+0x9e/0x9e [ 0.700012] [] ? __wake_up+0x32/0x3b [ 0.701157] [] kernel_init_freeable+0x164/0x1e1 [ 0.702379] [] ? kernel_init_freeable+0x164/0x1e1 [ 0.703343] [] kernel_init+0x8/0xb8 [ 0.704443] [] ret_from_kernel_thread+0x21/0x30 [ 0.705695] [] ? rest_init+0x6d/0x6d [ 0.706684] ---[ end trace 256446aaff3c6bbd ]--- [ 0.707933] ------------[ cut here ]------------ Thanks, Ying Huang