FYI, we noticed the following commit (built with gcc-7): commit: d9c2d4fb343f1d18bab1dcdf4ab6f92c474256dd ("mm: Introduce pagecache page access counter") https://kernel.googlesource.com/pub/scm/linux/kernel/git/wfg/linux.git fan-mapcount in testcase: xfstests with following parameters: disk: 4HDD fs: ext4 test: generic-group9 test-description: xfstests is a regression test suite for xfs and other files ystems. test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 2G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +------------------------------------------------------------------------------------------+------------+------------+ | | 249155c20f | d9c2d4fb34 | +------------------------------------------------------------------------------------------+------------+------------+ | boot_successes | 110 | 22 | | boot_failures | 2083 | 83 | | BUG:kernel_reboot-without-warning_in_test_stage | 2061 | 27 | | invoked_oom-killer:gfp_mask=0x | 2 | | | Mem-Info | 2 | | | WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_tx[mac80211_hwsim] | 10 | | | RIP:mac80211_hwsim_tx[mac80211_hwsim] | 10 | | | WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_roc[mac80211_hwsim] | 3 | | | RIP:mac80211_hwsim_roc[mac80211_hwsim] | 3 | | | BUG:kernel_NULL_pointer_dereference,address | 1 | | | Oops:#[##] | 1 | | | RIP:ieee80211_subif_start_xmit[mac80211] | 1 | | | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 1 | | | WARNING:at_kernel/time/hrtimer.c:#hrtimer_forward | 1 | | | RIP:hrtimer_forward | 1 | | | WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_hw_scan[mac80211_hwsim] | 1 | | | RIP:mac80211_hwsim_hw_scan[mac80211_hwsim] | 1 | | | WARNING:at_net/mac80211/tx.c:#__ieee80211_csa_update_counter[mac80211] | 4 | | | RIP:__ieee80211_csa_update_counter[mac80211] | 4 | | | RIP:__fsnotify_parent | 1 | | | RIP:console_unlock | 2 | | | RIP:native_safe_halt | 1 | | | BUG:kernel_hang_in_test_stage | 0 | 1 | | kernel_BUG_at_mm/page_alloc.c | 0 | 47 | | invalid_opcode:#[##] | 0 | 47 | | RIP:__isolate_free_page | 0 | 47 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 47 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d | 0 | 4 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d9 | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fe | 0 | 3 | | BUG:Bad_page_cache_in_process_holetest_pfn:#af6e | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a592 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d49 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e7b0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fa9 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#da73 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f9ef | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#de0b | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ac | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn | 0 | 7 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c63f | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b | 0 | 5 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e8d | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bb67 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c4 | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ffc0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b3 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ddd | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c565 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d5ab | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#afae | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d23 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c | 0 | 3 | | BUG:Bad_page_cache_in_process_holetest_pfn:#cd80 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b41c | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b7cc | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#af89 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a730 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d3a2 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c8 | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#df73 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#aa6 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b321 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d51 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bbdf | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d0fe | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bb6f | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c5 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a581 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b227 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ae2 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a0d8 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b545 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f064 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b867 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e2db | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f7fb | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f0c6 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c3a0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f1c3 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f8 | 0 | 3 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fb23 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#dade | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d8 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:b5e6e | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a19 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:b6e4c | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a2 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fd | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:b6524 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ddbd | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e01d | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e0e6 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fe75 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f6 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#da | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#df | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e1 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a014 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a0bf | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a10d | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a1b1 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d52c | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a20 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f2e8 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f2f4 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f324 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f329 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f354 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b200 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b8b4 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b64 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c7 | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f136 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a929 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bf | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d41 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c3d9 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d6e | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#abca | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a35f | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f | 0 | 3 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c758 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a257 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a9dc | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d3e | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d406 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#be2 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a28a | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#da2 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e2b3 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e3ec | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c89 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f08 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fdb7 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a | 0 | 3 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d2b1 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a6 | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e12a | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c2 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d6cc | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d6d2 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#db88 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d6 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c1 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b1cb | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#be74 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f81 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e4e | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d25f | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c372 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a9a | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e7ba | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c80f | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c308 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bb4b | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b73f | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#abac | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b2 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b2b1 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d574 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b1a | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a52 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e6 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d78c | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e5cc | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f1b4 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f36f | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bc4d | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bd4c | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b78 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c104 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ee1 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a6dc | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b1f0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b46e | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e538 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f8c | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e021 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a67 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f812 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#aa7 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e47 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ad9 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#df5 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ff | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b16 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b18 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b53 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#be | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c80 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e21 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#f7a | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fdd | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b87 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#aa | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:bbe13 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:bbe5f | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fc | 0 | 2 | | BUG:Bad_page_cache_in_process_holetest_pfn:#eb | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c9 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a49 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e8db | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#eb05 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#eb58 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a837 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ba | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c7d | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a8 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c6a | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ec0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ed5 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a4 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ef | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bcd | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#dc3b | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#dc44 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ae7 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c8d | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#e14 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d315 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ed92 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d31 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a198 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ad0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ad4c | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#ae28 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a31 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c547 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c75b | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#bd21 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a3c5 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#faa6 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fb79 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a36 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:be226 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b03b | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:bdcc1 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c35 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#b0 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d61 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#d817 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#fa8 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#a745 | 0 | 1 | | BUG:Bad_page_cache_in_process_holetest_pfn:#c78e | 0 | 1 | | BUG:kernel_hang_in_boot-around-mounting-root_stage | 0 | 1 | +------------------------------------------------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <lkp(a)intel.com&gt; [ 418.216231] kernel BUG at mm/page_alloc.c:3070! [ 418.219970] invalid opcode: 0000 [#1] SMP PTI [ 418.222889] CPU: 0 PID: 26 Comm: kcompactd0 Not tainted 5.2.0-rc6-00016-gd9c2d4f #1 [ 418.226988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 418.231272] RIP: 0010:__isolate_free_page+0x1b5/0x1d0 [ 418.234448] Code: ff ff 83 e8 03 83 f8 02 76 0d be 01 00 00 00 4c 89 ff e8 fe ea ff ff 49 81 c7 00 80 00 00 4c 39 fb 77 bf 89 ea e9 04 ff ff ff <0f> 0b 48 8b 54 24 08 be 0c 00 00 00 4c 89 e7 e8 87 85 fc ff e9 1e [ 418.243988] RSP: 0018:ffffb6d480403ba0 EFLAGS: 00010007 [ 418.247172] RAX: 0000000000000000 RBX: 0000000000000680 RCX: ffffdb45003b7808 [ 418.251445] RDX: 0000000000000003 RSI: 0000000000000005 RDI: ffffdb4501c37000 [ 418.255192] RBP: 0000000000000065 R08: ffffb6d480403de0 R09: 0000000000000065 [ 418.259108] R10: ffffdb4501c37000 R11: ffff8d99eb4b7958 R12: 0000000000000005 [ 418.262710] R13: 0000000000000100 R14: ffff8d99eb4b7000 R15: 0000000000000000 [ 418.266560] FS: 0000000000000000(0000) GS:ffff8d99e9000000(0000) knlGS:0000000000000000 [ 418.270717] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 418.274221] CR2: 00000000004216d0 CR3: 000000007a57a000 CR4: 00000000000006f0 [ 418.278369] Call Trace: [ 418.280918] compaction_alloc+0x3a3/0x9a0 [ 418.283842] ? pageblock_skip_persistent+0x40/0x40 [ 418.287032] migrate_pages+0x239/0xbd0 [ 418.290108] ? isolate_freepages_block+0x390/0x390 [ 418.293289] compact_zone+0x5cd/0xdd0 [ 418.295873] kcompactd_do_work+0x139/0x300 [ 418.298900] ? __switch_to_asm+0x34/0x70 [ 418.301831] ? __switch_to_asm+0x40/0x70 [ 418.304602] ? prepare_to_wait_event+0x99/0x190 [ 418.307524] ? kcompactd_do_work+0x300/0x300 [ 418.310371] ? kcompactd+0x8c/0x200 [ 418.313020] kcompactd+0x8c/0x200 [ 418.315455] ? finish_wait+0x80/0x80 [ 418.318035] kthread+0x11e/0x140 [ 418.320407] ? kthread_park+0x90/0x90 [ 418.323205] ret_from_fork+0x35/0x40 [ 418.325736] Modules linked in: ext4 mbcache jbd2 dm_mod crct10dif_pclmul crc32_pclmul bochs_drm crc32c_intel ttm ghash_clmulni_intel drm_kms_helper sr_mod cdrom sg snd_pcm syscopyarea sysfillrect sysimgblt ppdev fb_sys_fops snd_timer snd drm aesni_intel crypto_simd soundcore cryptd glue_helper ata_generic joydev pata_acpi pcspkr serio_raw parport_pc floppy ata_piix parport libata i2c_piix4 ip_tables [ 418.343484] ---[ end trace dd63ae8e91bad72d ]--- To reproduce: # build kernel cd linux cp config-5.2.0-rc6-00016-gd9c2d4f .config make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email Thanks, lkp