Using current linux.git (e1915c8195b38393), I get various oopses shown below.
Note that I'm testing x86_32 kernel using x86_64 CPUs. Note that *pde = 00000000 in most cases.
----------------------------------------
localhost login: [ 64.800994] BUG: unable to handle kernel paging request at 1b4150b6
[ 64.803072] IP: lock_page_memcg+0x3c/0x80
[ 64.804408] *pde = 00000000
[ 64.805352] Oops: 0000 [#1] SMP
[ 64.806418] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp vmw_balloon vmw_vmci pcspkr sg i2c_piix4 shpchp ip_tables xfs libcrc32c sr_mod cdrom sd_mod ata_generic pata_acpi serio_raw mptspi scsi_transport_spi mptscsih e1000 mptbase ata_piix libata
[ 64.823138] CPU: 4 PID: 3928 Comm: a.out Not tainted 4.15.0-rc6+ #258
[ 64.824992] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 64.828027] EIP: lock_page_memcg+0x3c/0x80
[ 64.829193] EFLAGS: 00010202 CPU: 4
[ 64.830193] EAX: f33fa6e0 EBX: 1b414f46 ECX: 00000011 EDX: 00000000
[ 64.831968] ESI: 00000010 EDI: f33fa6e0 EBP: ec3e3a84 ESP: ec3e3a78
[ 64.833733] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 64.835533] CR0: 80050033 CR2: 1b4150b6 CR3: 2ba99000 CR4: 000406d0
[ 64.837416] Call Trace:
[ 64.838140] page_remove_rmap+0x92/0x280
[ 64.839276] try_to_unmap_one+0x202/0x530
[ 64.840423] rmap_walk_file+0xf0/0x1e0
[ 64.841497] rmap_walk+0x32/0x60
[ 64.842448] try_to_unmap+0x4d/0xd0
[ 64.843463] ? page_remove_rmap+0x280/0x280
[ 64.844654] ? page_not_mapped+0x10/0x10
[ 64.845781] ? page_get_anon_vma+0x80/0x80
[ 64.847085] shrink_page_list+0x3e2/0xe40
[ 64.848235] shrink_inactive_list+0x1b2/0x440
[ 64.849476] shrink_node_memcg+0x34a/0x770
[ 64.850684] shrink_node+0xbb/0x2e0
[ 64.852554] do_try_to_free_pages+0xb2/0x300
[ 64.854599] try_to_free_pages+0x20b/0x330
----------------------------------------
----------------------------------------
localhost login: [ 205.084518] BUG: unable to handle kernel NULL pointer dereference at 00000104
[ 205.087492] IP: free_pcppages_bulk+0x8e/0x300
[ 205.088554] WARNING: CPU: 5 PID: 1817 at fs/xfs/xfs_aops.c:1468 xfs_vm_set_page_dirty+0x125/0x210 [xfs]
[ 205.088555] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp sg vmw_balloon pcspkr i2c_piix4 vmw_vmci shpchp ip_tables xfs libcrc32c sr_mod cdrom sd_mod ata_generic pata_acpi serio_raw e1000 mptspi scsi_transport_spi ata_piix mptscsih libata mptbase
[ 205.088582] CPU: 5 PID: 1817 Comm: a.out Not tainted 4.15.0-rc6+ #258
[ 205.088583] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 205.088604] EIP: xfs_vm_set_page_dirty+0x125/0x210 [xfs]
[ 205.088605] EFLAGS: 00010046 CPU: 5
[ 205.088606] EAX: b6000011 EBX: f247dd58 ECX: f247dd58 EDX: f247dd4c
[ 205.088607] ESI: 00000246 EDI: f4b7b8c8 EBP: f36b9a8c ESP: f36b9a68
[ 205.088609] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 205.088610] CR0: 80050033 CR2: 38e5e008 CR3: 32881000 CR4: 000406d0
[ 205.088689] Call Trace:
[ 205.088696] set_page_dirty+0x3d/0x90
[ 205.088699] try_to_unmap_one+0x36b/0x530
[ 205.088702] rmap_walk_file+0xf0/0x1e0
[ 205.088704] rmap_walk+0x32/0x60
[ 205.088706] try_to_unmap+0x4d/0xd0
[ 205.088708] ? page_remove_rmap+0x280/0x280
[ 205.088709] ? page_not_mapped+0x10/0x10
[ 205.088711] ? page_get_anon_vma+0x80/0x80
[ 205.088714] shrink_page_list+0x3e2/0xe40
[ 205.088717] ? clockevents_program_event+0xa5/0x160
[ 205.088721] shrink_inactive_list+0x1b2/0x440
[ 205.088723] shrink_node_memcg+0x34a/0x770
[ 205.088726] shrink_node+0xbb/0x2e0
[ 205.088728] do_try_to_free_pages+0xb2/0x300
[ 205.088730] try_to_free_pages+0x20b/0x330
[ 205.088733] __alloc_pages_slowpath+0x2fb/0x6d9
[ 205.088736] ? __pagevec_lru_add_fn+0xdb/0x190
[ 205.088738] __alloc_pages_nodemask+0x17a/0x190
[ 205.088742] do_anonymous_page+0xab/0x490
[ 205.088744] handle_mm_fault+0x531/0x8b0
[ 205.088746] ? pick_next_task_fair+0xe1/0x490
[ 205.088749] ? sched_clock_cpu+0x13/0x120
[ 205.088752] ? __do_page_fault+0x4e0/0x4e0
[ 205.088754] __do_page_fault+0x1ef/0x4e0
[ 205.088756] ? __do_page_fault+0x4e0/0x4e0
[ 205.088758] do_page_fault+0x1a/0x20
[ 205.088762] common_exception+0x6f/0x76
[ 205.088763] EIP: 0x80484be
[ 205.088764] EFLAGS: 00010202 CPU: 5
[ 205.088765] EAX: 026a6000 EBX: 80000000 ECX: 3a597008 EDX: 00000000
[ 205.088766] ESI: 7ff00000 EDI: 00000000 EBP: bf89aa48 ESP: bf89aa20
[ 205.088767] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 205.088768] Code: e4 8d 58 0c 89 d8 e8 5b b1 c2 c8 89 c6 8b 45 e8 8b 50 04 85 d2 74 5b 8b 40 14 a8 01 0f 85 ce 00 00 00 8b 45 e8 8b 00 a8 08 75 7b <0f> ff 8b 7d e8 8b 55 e4 89 f8 e8 8c 71 6f c8 8b 47 14 a8 01 0f
[ 205.088792] ---[ end trace ffb022c0c4b1f1da ]---
[ 205.245444] *pde = 00000000
[ 205.247303] Oops: 0002 [#1] SMP
[ 205.249245] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp sg vmw_balloon pcspkr i2c_piix4 vmw_vmci shpchp ip_tables xfs libcrc32c sr_mod cdrom sd_mod ata_generic pata_acpi serio_raw e1000 mptspi scsi_transport_spi ata_piix mptscsih libata mptbase
[ 205.278257] CPU: 3 PID: 363 Comm: kworker/3:2 Tainted: G W 4.15.0-rc6+ #258
[ 205.282307] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 205.288393] Workqueue: mm_percpu_wq drain_local_pages_wq
[ 205.291486] EIP: free_pcppages_bulk+0x8e/0x300
[ 205.294272] EFLAGS: 00010093 CPU: 3
[ 205.296725] EAX: 00000200 EBX: f4b7b8dc ECX: c18dbc80 EDX: 00000100
[ 205.300201] ESI: f4b7b8c8 EDI: c18db9e0 EBP: f6429ef4 ESP: f6429ebc
[ 205.303655] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 205.306816] CR0: 80050033 CR2: 00000104 CR3: 2876b000 CR4: 000406d0
[ 205.310373] Call Trace:
[ 205.312512] drain_pages_zone+0x31/0x50
[ 205.315176] drain_pages+0x35/0x50
[ 205.317650] drain_local_pages+0x25/0x30
[ 205.320316] drain_local_pages_wq+0xa/0x10
[ 205.323025] process_one_work+0xe7/0x240
[ 205.325684] worker_thread+0x182/0x360
[ 205.328275] ? __wake_up_locked+0x22/0x30
[ 205.330995] kthread+0xd1/0x100
[ 205.333395] ? rescuer_thread+0x2d0/0x2d0
[ 205.336087] ? kthread_associate_blkcg+0x80/0x80
[ 205.338997] ret_from_fork+0x19/0x24
[ 205.341530] Code: 40 0c 89 75 e0 39 c6 74 d4 8b 45 dc 83 f8 03 0f 44 45 d4 89 45 dc 8d b4 26 00 00 00 00 8b 45 e0 8b 58 04 8b 43 04 8d 73 ec 8b 13 <89> 42 04 89 10 8b 43 f4 c7 03 00 01 00 00 c7 43 04 00 02 00 00
[ 205.352013] EIP: free_pcppages_bulk+0x8e/0x300 SS:ESP: 0068:f6429ebc
[ 205.355540] CR2: 0000000000000104
[ 205.358007] ---[ end trace ffb022c0c4b1f1db ]---
[ 205.358008] BUG: unable to handle kernel paging request at c10746c4
[ 205.358015] IP: _raw_spin_lock_irqsave+0x1c/0x40
[ 205.358015] *pde = 010001e1
[ 205.358018] Oops: 0003 [#2] SMP
[ 205.358018] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp sg vmw_balloon pcspkr i2c_piix4 vmw_vmci shpchp ip_tables xfs libcrc32c sr_mod cdrom sd_mod ata_generic pata_acpi serio_raw e1000 mptspi scsi_transport_spi ata_piix mptscsih libata mptbase
[ 205.358051] CPU: 5 PID: 1817 Comm: a.out Tainted: G D W 4.15.0-rc6+ #258
[ 205.358051] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 205.358054] EIP: _raw_spin_lock_irqsave+0x1c/0x40
[ 205.358054] EFLAGS: 00010046 CPU: 5
[ 205.358055] EAX: 00000000 EBX: 00000001 ECX: c10746c4 EDX: 00000000
[ 205.358057] ESI: 00000206 EDI: f31afe80 EBP: f36b9a70 ESP: f36b9a68
[ 205.358058] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 205.358059] CR0: 80050033 CR2: c10746c4 CR3: 32881000 CR4: 000406d0
[ 205.358165] Call Trace:
[ 205.358169] ? dequeue_entity+0xd0/0x290
[ 205.358171] ? dequeue_entity+0x244/0x290
[ 205.358175] lock_page_memcg+0x25/0x80
[ 205.358178] page_remove_rmap+0x92/0x280
[ 205.358180] try_to_unmap_one+0x202/0x530
[ 205.358182] rmap_walk_file+0xf0/0x1e0
[ 205.358184] rmap_walk+0x32/0x60
[ 205.358186] try_to_unmap+0x4d/0xd0
[ 205.358188] ? page_remove_rmap+0x280/0x280
[ 205.358189] ? page_not_mapped+0x10/0x10
[ 205.358191] ? page_get_anon_vma+0x80/0x80
[ 205.358195] shrink_page_list+0x3e2/0xe40
[ 205.358198] ? clockevents_program_event+0xa5/0x160
[ 205.358201] shrink_inactive_list+0x1b2/0x440
[ 205.358204] shrink_node_memcg+0x34a/0x770
[ 205.358206] shrink_node+0xbb/0x2e0
[ 205.358208] do_try_to_free_pages+0xb2/0x300
[ 205.358210] try_to_free_pages+0x20b/0x330
[ 205.358213] __alloc_pages_slowpath+0x2fb/0x6d9
[ 205.358215] ? __pagevec_lru_add_fn+0xdb/0x190
[ 205.358218] __alloc_pages_nodemask+0x17a/0x190
[ 205.358221] do_anonymous_page+0xab/0x490
[ 205.358223] handle_mm_fault+0x531/0x8b0
[ 205.358224] ? pick_next_task_fair+0xe1/0x490
[ 205.358226] ? sched_clock_cpu+0x13/0x120
[ 205.358229] ? __do_page_fault+0x4e0/0x4e0
[ 205.358231] __do_page_fault+0x1ef/0x4e0
[ 205.358233] ? __do_page_fault+0x4e0/0x4e0
[ 205.358234] do_page_fault+0x1a/0x20
[ 205.358237] common_exception+0x6f/0x76
[ 205.358238] EIP: 0x80484be
[ 205.358239] EFLAGS: 00010202 CPU: 5
[ 205.358240] EAX: 026a6000 EBX: 80000000 ECX: 3a597008 EDX: 00000000
[ 205.358241] ESI: 7ff00000 EDI: 00000000 EBP: bf89aa48 ESP: bf89aa20
[ 205.358242] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 205.358243] Code: eb f2 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 89 c1 89 e5 56 53 9c 58 66 66 66 90 89 c6 fa 66 66 90 66 90 31 c0 bb 01 00 00 00 <f0> 0f b1 19 85 c0 75 06 89 f0 5b 5e 5d c3 89 c2 89 c8 e8 5d 1b
[ 205.358268] EIP: _raw_spin_lock_irqsave+0x1c/0x40 SS:ESP: 0068:f36b9a68
[ 205.358269] CR2: 00000000c10746c4
[ 205.358271] ---[ end trace ffb022c0c4b1f1dc ]---
----------------------------------------
----------------------------------------
localhost login: [ 67.347704] BUG: unable to handle kernel NULL pointer dereference at 00000180
[ 67.350154] IP: lock_page_memcg+0x3c/0x80
[ 67.351621] *pde = 00000000
[ 67.352731] Oops: 0000 [#1] SMP
[ 67.353916] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter i2c_piix4 coretemp vmw_balloon pcspkr shpchp sg vmw_vmci ip_tables xfs libcrc32c sd_mod sr_mod cdrom ata_generic pata_acpi serio_raw mptspi e1000 scsi_transport_spi ata_piix mptscsih libata mptbase
[ 67.373491] CPU: 2 PID: 1052 Comm: a.out Not tainted 4.15.0-rc6+ #258
[ 67.376019] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 67.380424] EIP: lock_page_memcg+0x3c/0x80
[ 67.382368] EFLAGS: 00010202 CPU: 2
[ 67.384037] EAX: f3537288 EBX: 00000010 ECX: 00000222 EDX: 00000000
[ 67.386589] ESI: 0000021e EDI: f3537288 EBP: f29438e4 ESP: f29438d8
[ 67.389089] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 67.391425] CR0: 80050033 CR2: 00000180 CR3: 32fcd000 CR4: 000406d0
[ 67.394103] Call Trace:
[ 67.395533] page_remove_rmap+0x92/0x280
[ 67.397470] try_to_unmap_one+0x202/0x530
[ 67.399499] rmap_walk_file+0xf0/0x1e0
[ 67.401413] rmap_walk+0x32/0x60
[ 67.403160] try_to_unmap+0x4d/0xd0
[ 67.404984] ? page_remove_rmap+0x280/0x280
[ 67.407122] ? page_not_mapped+0x10/0x10
[ 67.409115] ? page_get_anon_vma+0x80/0x80
[ 67.411170] shrink_page_list+0x3e2/0xe40
[ 67.413214] shrink_inactive_list+0x1b2/0x440
[ 67.415471] shrink_node_memcg+0x34a/0x770
[ 67.417562] shrink_node+0xbb/0x2e0
[ 67.419462] do_try_to_free_pages+0xb2/0x300
[ 67.421628] try_to_free_pages+0x20b/0x330
[ 67.423783] ? __queue_work+0xe6/0x270
[ 67.425803] __alloc_pages_slowpath+0x2fb/0x6d9
[ 67.428044] __alloc_pages_nodemask+0x17a/0x190
[ 67.430293] pagecache_get_page+0x53/0x200
[ 67.432417] ? common_exception+0x6f/0x76
[ 67.434476] grab_cache_page_write_begin+0x20/0x40
[ 67.436758] iomap_write_begin.constprop.17+0x6d/0xf0
[ 67.439118] ? iov_iter_fault_in_readable+0x7b/0xd0
[ 67.441397] iomap_write_actor+0xb4/0x1a0
[ 67.443392] ? iomap_write_begin.constprop.17+0xf0/0xf0
[ 67.445735] iomap_apply+0xd8/0x1b0
[ 67.447574] ? iomap_write_begin.constprop.17+0xf0/0xf0
[ 67.449710] iomap_file_buffered_write+0x83/0xc0
[ 67.451670] ? iomap_write_begin.constprop.17+0xf0/0xf0
[ 67.453780] xfs_file_buffered_aio_write+0xa3/0x200 [xfs]
[ 67.455983] xfs_file_write_iter+0x77/0x150 [xfs]
[ 67.457919] __vfs_write+0xef/0x150
[ 67.459511] vfs_write+0x96/0x190
[ 67.461042] SyS_write+0x44/0xa0
[ 67.462737] do_fast_syscall_32+0x87/0x179
[ 67.464471] entry_SYSENTER_32+0x4e/0x7c
[ 67.466141] EIP: 0xb7fd2da1
[ 67.467484] EFLAGS: 00000246 CPU: 2
[ 67.469020] EAX: ffffffda EBX: 00000003 ECX: 0804a060 EDX: 00001000
[ 67.471392] ESI: 00000009 EDI: 00000000 EBP: bfc76ff8 ESP: bfc76fb8
[ 67.473702] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 67.475803] Code: db 75 28 eb 5c 66 90 8d b3 74 01 00 00 89 f0 e8 3b 2a 4e 00 8b 4f 20 39 d9 74 2c 89 c2 89 f0 e8 db 26 4e 00 8b 5f 20 85 db 74 36 <8b> 83 70 01 00 00 85 c0 7f d2 89 d9 5b 89 c8 5e 5f 5d c3 90 31
[ 67.483059] EIP: lock_page_memcg+0x3c/0x80 SS:ESP: 0068:f29438d8
[ 67.485404] CR2: 0000000000000180
[ 67.487139] ---[ end trace 8260c8de0ee96afd ]---
----------------------------------------
----------------------------------------
[ 47.171548] BUG: unable to handle kernel paging request at 32eac034
[ 47.174531] IP: page_remove_rmap+0x19a/0x2e0
[ 47.176259] *pde = 00000000
[ 47.177373] Oops: 0002 [#1] SMP DEBUG_PAGEALLOC
[ 47.179335] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp vmw_balloon pcspkr sg vmw_vmci i2c_piix4 shpchp ip_tables xfs libcrc32c sr_mod cdrom sd_mod ata_generic pata_acpi serio_raw mptspi scsi_transport_spi mptscsih e1000 mptbase ata_piix libata
[ 47.202163] CPU: 6 PID: 2947 Comm: a.out Not tainted 4.15.0-rc6+ #259
[ 47.204828] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 47.210263] EIP: page_remove_rmap+0x19a/0x2e0
[ 47.212606] EFLAGS: 00010286 CPU: 6
[ 47.214687] EAX: 00000000 EBX: f342cbe0 ECX: ffffffe2 EDX: 0000000d
[ 47.217816] ESI: ffffffff EDI: f4a29240 EBP: cc4e1a6c ESP: cc4e1a64
[ 47.220462] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 47.222837] CR0: 80050033 CR2: 32eac034 CR3: 2bb4a000 CR4: 000406d0
[ 47.225461] Call Trace:
[ 47.226954] try_to_unmap_one+0x20e/0x590
[ 47.228920] rmap_walk_file+0x13c/0x250
[ 47.230802] rmap_walk+0x32/0x60
[ 47.232945] try_to_unmap+0x4d/0x100
[ 47.235331] ? page_remove_rmap+0x2e0/0x2e0
[ 47.237999] ? page_not_mapped+0x10/0x10
[ 47.240660] ? page_get_anon_vma+0x80/0x80
[ 47.243251] shrink_page_list+0x3a2/0x1010
[ 47.245916] shrink_inactive_list+0x1b2/0x440
[ 47.248042] shrink_node_memcg+0x34a/0x770
[ 47.250084] ? __queue_work+0xf2/0x290
[ 47.252020] shrink_node+0xbb/0x2e0
[ 47.253940] do_try_to_free_pages+0xba/0x320
[ 47.256063] try_to_free_pages+0x11d/0x340
[ 47.258152] ? __switch_to+0xa2/0x220
[ 47.260102] __alloc_pages_slowpath+0x303/0x6e2
[ 47.262314] ? page_cache_tree_insert+0xb0/0xb0
[ 47.264506] __alloc_pages_nodemask+0x1a7/0x1c0
[ 47.266713] wp_page_copy+0x5f/0x650
[ 47.268627] ? reuse_swap_page+0x64/0x200
[ 47.270586] do_wp_page+0x82/0x450
[ 47.272541] ? filemap_fdatawait_keep_errors+0x50/0x50
[ 47.274707] handle_mm_fault+0x522/0x8d0
[ 47.276547] __do_page_fault+0x1ef/0x4e0
[ 47.278328] ? __do_page_fault+0x4e0/0x4e0
[ 47.280160] do_page_fault+0x1a/0x20
[ 47.281798] common_exception+0x6f/0x76
[ 47.283490] EIP: 0xb7f86025
[ 47.284869] EFLAGS: 00010246 CPU: 6
[ 47.286405] EAX: b7e91930 EBX: b7f99fbc ECX: 0804a00c EDX: 00000000
[ 47.289057] ESI: b7f983d0 EDI: b7db39cc EBP: bfe325b0 ESP: bfe32568
[ 47.291615] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 47.293891] Code: ff ff ff 89 f1 ba 0d 00 00 00 b8 20 f8 8e c1 e8 3d 37 fe ff 66 66 66 66 90 8b 43 20 85 c0 74 1f 66 66 66 66 90 8b 80 80 01 00 00 <64> 01 70 34 8b 43 20 8b 80 fc 01 00 00 8b 40 44 64 01 70 34 8b
[ 47.301428] EIP: page_remove_rmap+0x19a/0x2e0 SS:ESP: 0068:cc4e1a64
[ 47.303992] CR2: 0000000032eac034
[ 47.305695] ---[ end trace 1887d451e7998639 ]---
[ 47.310724] BUG: unable to handle kernel paging request at 5a5a5a04
[ 47.313277] IP: blk_flush_plug_list+0x77/0x210
[ 47.315196] *pde = 00000000
[ 47.316683] Oops: 0002 [#2] SMP DEBUG_PAGEALLOC
[ 47.318630] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp vmw_balloon pcspkr sg vmw_vmci i2c_piix4 shpchp ip_tables xfs libcrc32c sr_mod cdrom sd_mod ata_generic pata_acpi serio_raw mptspi scsi_transport_spi mptscsih e1000 mptbase ata_piix libata
[ 47.339036] CPU: 0 PID: 2947 Comm: a.out Tainted: G D 4.15.0-rc6+ #259
[ 47.342045] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 47.346781] EIP: blk_flush_plug_list+0x77/0x210
[ 47.348958] EFLAGS: 00010297 CPU: 0
[ 47.350841] EAX: cc4e1e40 EBX: cc4e1e40 ECX: eeed0ad7 EDX: 5a5a5a00
[ 47.353501] ESI: 00000001 EDI: cc4e1cbc EBP: cc4e1e58 ESP: cc4e1e2c
[ 47.356178] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 47.358636] CR0: 80050033 CR2: 5a5a5a04 CR3: 019d0000 CR4: 000406d0
[ 47.361376] Call Trace:
[ 47.363000] schedule+0x52/0x70
[ 47.364817] rwsem_down_write_failed+0x185/0x290
[ 47.367133] call_rwsem_down_write_failed+0x9/0xc
[ 47.369496] down_write+0x20/0x30
[ 47.371376] unlink_file_vma+0x25/0x40
[ 47.373370] free_pgtables+0x33/0xf0
[ 47.375323] ? unmap_vmas+0x3b/0x50
[ 47.377312] exit_mmap+0x92/0x140
[ 47.379162] mmput+0x4f/0xf0
[ 47.380827] do_exit+0x22c/0xa10
[ 47.382738] ? __do_page_fault+0x4e0/0x4e0
[ 47.384775] rewind_stack_do_exit+0x11/0x13
[ 47.386850] EIP: 0xb7f86025
[ 47.388512] EFLAGS: 00010246 CPU: 0
[ 47.390300] EAX: b7e91930 EBX: b7f99fbc ECX: 0804a00c EDX: 00000000
[ 47.392883] ESI: b7f983d0 EDI: b7db39cc EBP: bfe325b0 ESP: bfe32568
[ 47.395478] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 47.397799] Code: 45 e8 8b 57 14 89 4d e8 89 59 04 89 02 89 50 04 8b 45 dc 89 47 10 89 47 14 8d 76 00 8b 45 e8 39 c3 74 c9 8b 4d e8 8b 11 8b 41 04 <89> 42 04 89 10 89 f2 89 c8 c7 01 00 01 00 00 c7 41 04 00 02 00
[ 47.405344] EIP: blk_flush_plug_list+0x77/0x210 SS:ESP: 0068:cc4e1e2c
[ 47.407978] CR2: 000000005a5a5a04
[ 47.409744] ---[ end trace 1887d451e799863a ]---
----------------------------------------
----------------------------------------
[ 121.578226] BUG: unable to handle kernel paging request at 330fa01a
[ 121.581057] IP: page_remove_rmap+0x14/0x2e0
[ 121.583085] *pde = 00000000
[ 121.584784] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 121.586923] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp vmw_balloon pcspkr vmw_vmci sg i2c_piix4 shpchp ip_tables xfs libcrc32c sr_mod cdrom sd_mod ata_generic pata_acpi serio_raw mptspi scsi_transport_spi mptscsih e1000 ata_piix mptbase libata
[ 121.607308] CPU: 0 PID: 402 Comm: systemd-journal Not tainted 4.15.0-rc6+ #259
[ 121.610170] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 121.615142] EIP: page_remove_rmap+0x14/0x2e0
[ 121.617238] EFLAGS: 00010202 CPU: 0
[ 121.619085] EAX: 330fa016 EBX: f3246808 ECX: 00001534 EDX: 00000000
[ 121.621615] ESI: 00001533 EDI: f4af1d30 EBP: f2bb7a34 ESP: f2bb7a2c
[ 121.624079] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 121.626348] CR0: 80050033 CR2: 330fa01a CR3: 32b46000 CR4: 000406d0
[ 121.629207] Call Trace:
[ 121.630896] try_to_unmap_one+0x20e/0x590
[ 121.632921] rmap_walk_file+0x13c/0x250
[ 121.634703] rmap_walk+0x32/0x60
[ 121.636312] try_to_unmap+0x4d/0x100
[ 121.637987] ? page_remove_rmap+0x2e0/0x2e0
[ 121.639813] ? page_not_mapped+0x10/0x10
[ 121.641569] ? page_get_anon_vma+0x80/0x80
[ 121.643473] shrink_page_list+0x3a2/0x1010
[ 121.645371] ? wake_up_worker+0x1c/0x20
[ 121.647311] shrink_inactive_list+0x1b2/0x440
[ 121.649337] shrink_node_memcg+0x34a/0x770
[ 121.651141] shrink_node+0xbb/0x2e0
[ 121.652797] do_try_to_free_pages+0xba/0x320
[ 121.654649] try_to_free_pages+0x11d/0x340
[ 121.656427] ? schedule_timeout+0x136/0x200
[ 121.658204] __alloc_pages_slowpath+0x303/0x6e2
[ 121.660145] __alloc_pages_nodemask+0x1a7/0x1c0
[ 121.662107] filemap_fault+0x3ca/0x610
[ 121.663953] ? radix_tree_next_chunk+0xf1/0x2c0
[ 121.665860] ? _cond_resched+0x12/0x30
[ 121.667507] ? down_read+0xb/0x30
[ 121.669004] ? filemap_fdatawait_keep_errors+0x50/0x50
[ 121.670954] __xfs_filemap_fault.isra.16+0x2d/0xb0 [xfs]
[ 121.672910] ? filemap_fdatawait_keep_errors+0x50/0x50
[ 121.674819] xfs_filemap_fault+0xa/0x10 [xfs]
[ 121.676503] __do_fault+0x11/0x60
[ 121.678115] handle_mm_fault+0x6dd/0x8d0
[ 121.679850] ? ep_poll+0x1b2/0x340
[ 121.681347] __do_page_fault+0x1ef/0x4e0
[ 121.682889] ? __do_page_fault+0x4e0/0x4e0
[ 121.684422] do_page_fault+0x1a/0x20
[ 121.685827] common_exception+0x6f/0x76
[ 121.687285] EIP: 0xb7d89ad8
[ 121.688492] EFLAGS: 00010246 CPU: 0
[ 121.689858] EAX: 00000001 EBX: 00000007 ECX: bfd3e800 EDX: 00000012
[ 121.691915] ESI: ffffffff EDI: 00000012 EBP: bfd3e9b8 ESP: bfd3e7e4
[ 121.694042] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 121.696023] Code: c4 fe ff ff ba 78 55 7f c1 89 d8 e8 47 e5 fe ff 0f 0b 83 e8 01 eb 8e 55 89 e5 56 53 89 c3 8b 40 14 a8 01 0f 85 be 01 00 00 89 d8 <f6> 40 04 01 74 5e 84 d2 0f 85 9e 00 00 00 f0 83 43 0c ff 78 07
[ 121.702493] EIP: page_remove_rmap+0x14/0x2e0 SS:ESP: 0068:f2bb7a2c
[ 121.704587] CR2: 00000000330fa01a
[ 121.706032] ---[ end trace 6878785dacdbec93 ]---
----------------------------------------
----------------------------------------
localhost login: [ 87.199039] BUG: unable to handle kernel paging request at 3304501a
[ 87.200976] IP: page_remove_rmap+0x14/0x2e0
[ 87.202311] *pde = 00000000
[ 87.203268] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 87.204740] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp pcspkr vmw_balloon sg vmw_vmci shpchp i2c_piix4 ip_tables xfs libcrc32c sd_mod sr_mod cdrom ata_generic pata_acpi mptspi e1000 ata_piix scsi_transport_spi mptscsih mptbase libata serio_raw
[ 87.221708] CPU: 0 PID: 32 Comm: kswapd0 Not tainted 4.15.0-rc6+ #259
[ 87.223963] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 87.227825] EIP: page_remove_rmap+0x14/0x2e0
[ 87.229475] EFLAGS: 00210202 CPU: 0
[ 87.230981] EAX: 33045016 EBX: f30afe40 ECX: 00000eca EDX: 00000000
[ 87.233204] ESI: 00000e7e EDI: f494dd08 EBP: f35ebc4c ESP: f35ebc44
[ 87.235533] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 87.237674] CR0: 80050033 CR2: 3304501a CR3: 019d0000 CR4: 000406d0
[ 87.240187] Call Trace:
[ 87.241491] try_to_unmap_one+0x20e/0x590
[ 87.243246] rmap_walk_file+0x13c/0x250
[ 87.244921] rmap_walk+0x32/0x60
[ 87.246500] try_to_unmap+0x4d/0x100
[ 87.248134] ? page_remove_rmap+0x2e0/0x2e0
[ 87.249932] ? page_not_mapped+0x10/0x10
[ 87.251897] ? page_get_anon_vma+0x80/0x80
[ 87.253806] shrink_page_list+0x3a2/0x1010
[ 87.255700] shrink_inactive_list+0x1b2/0x440
[ 87.257671] shrink_node_memcg+0x34a/0x770
[ 87.259527] shrink_node+0xbb/0x2e0
[ 87.261369] kswapd+0x23f/0x5c0
[ 87.263047] kthread+0xd1/0x100
[ 87.264812] ? mem_cgroup_shrink_node+0xa0/0xa0
[ 87.267011] ? kthread_associate_blkcg+0x80/0x80
[ 87.269229] ret_from_fork+0x19/0x24
[ 87.271061] Code: c4 fe ff ff ba 78 55 7f c1 89 d8 e8 47 e5 fe ff 0f 0b 83 e8 01 eb 8e 55 89 e5 56 53 89 c3 8b 40 14 a8 01 0f 85 be 01 00 00 89 d8 <f6> 40 04 01 74 5e 84 d2 0f 85 9e 00 00 00 3e 83 43 0c ff 78 07
[ 87.278478] EIP: page_remove_rmap+0x14/0x2e0 SS:ESP: 0068:f35ebc44
[ 87.280872] CR2: 000000003304501a
[ 87.282602] ---[ end trace dd23f463fd05949e ]---
----------------------------------------
----------------------------------------
localhost login: [ 44.046356] a.out invoked oom-killer: gfp_mask=0x14280ca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), nodemask=(null), order=0, oom_score_adj=0
[ 44.050525] CPU: 7 PID: 2807 Comm: a.out Not tainted 4.15.0-rc6+ #260
[ 44.052755] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 44.057764] Call Trace:
[ 44.059257] dump_stack+0x58/0x76
[ 44.061118] dump_header+0x66/0x261
[ 44.063095] ? ___ratelimit+0x83/0xf0
[ 44.065194] oom_kill_process+0x1e5/0x3e0
[ 44.067397] ? has_capability_noaudit+0x1f/0x30
[ 44.069842] ? oom_badness+0xd0/0x130
[ 44.071974] ? oom_evaluate_task+0xa2/0xe0
[ 44.074257] out_of_memory+0xf2/0x290
[ 44.076144] __alloc_pages_slowpath+0x5c1/0x6e2
[ 44.078336] __alloc_pages_nodemask+0x1a7/0x1c0
[ 44.080369] do_anonymous_page+0xab/0x4f0
[ 44.082067] handle_mm_fault+0x531/0x8d0
[ 44.083738] ? __phys_addr+0x32/0x70
[ 44.085469] ? load_new_mm_cr3+0x6a/0x90
[ 44.087200] __do_page_fault+0x1ef/0x4e0
[ 44.089274] ? __do_page_fault+0x4e0/0x4e0
[ 44.091028] do_page_fault+0x1a/0x20
[ 44.092647] common_exception+0x6f/0x76
[ 44.094341] EIP: 0x80484be
[ 44.096293] EFLAGS: 00010202 CPU: 7
[ 44.098275] EAX: 00a2d000 EBX: 80000000 ECX: 38902008 EDX: 00000000
[ 44.101035] ESI: 7ff00000 EDI: 00000000 EBP: bfa039f8 ESP: bfa039d0
[ 44.103192] page:5a5a0697 count:-1055023618 mapcount:-1055030029 mapping:26f4be11 index:0xc11d7c83
[ 44.103196] flags: 0xc10528fe(waiters|error|referenced|uptodate|dirty|lru|active|reserved|private_2|mappedtodisk|swapbacked)
[ 44.103200] raw: c10528fe c114fff7 c11d7c83 c11d84f2 c11d9dfe c11daa34 c11daaa0 c13e65df
[ 44.103201] raw: c13e4a1c c13e4c62
[ 44.103202] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0)
[ 44.103203] page->mem_cgroup:35401b27
[ 44.103208] ------------[ cut here ]------------
[ 44.103209] kernel BUG at ./include/linux/mm.h:844!
[ 44.103214] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 44.103214] Modules linked in: ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp sg i2c_piix4 pcspkr vmw_balloon vmw_vmci shpchp ip_tables xfs libcrc32c sr_mod cdrom sd_mod ata_generic pata_acpi serio_raw mptspi scsi_transport_spi mptscsih e1000 mptbase ata_piix libata
[ 44.103246] CPU: 4 PID: 1954 Comm: a.out Not tainted 4.15.0-rc6+ #260
[ 44.103247] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 44.103253] EIP: isolate_lru_page+0x234/0x260
[ 44.103254] EFLAGS: 00010086 CPU: 4
[ 44.103255] EAX: 00000019 EBX: c18efb40 ECX: c18c4b5c EDX: 00000002
[ 44.103256] ESI: f3179560 EDI: e910244c EBP: ee30fa80 ESP: ee30fa64
[ 44.103257] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 44.103258] CR0: 80050033 CR2: 3bf77008 CR3: 2e72c000 CR4: 000406d0
[ 44.103332] Call Trace:
[ 44.103338] clear_page_mlock+0x71/0xc0
[ 44.103340] page_remove_rmap+0x2a9/0x2e0
[ 44.103341] try_to_unmap_one+0x20e/0x590
[ 44.103344] rmap_walk_file+0x13c/0x250
[ 44.103346] rmap_walk+0x32/0x60
[ 44.103347] try_to_unmap+0x4d/0x100
[ 44.103349] ? page_remove_rmap+0x2e0/0x2e0
[ 44.103351] ? page_not_mapped+0x10/0x10
[ 44.103352] ? page_get_anon_vma+0x80/0x80
[ 44.103354] shrink_page_list+0x3a2/0x1010
[ 44.103357] shrink_inactive_list+0x1b2/0x440
[ 44.103360] shrink_node_memcg+0x34a/0x770
[ 44.103363] shrink_node+0xbb/0x2e0
[ 44.103365] do_try_to_free_pages+0xba/0x320
[ 44.103367] try_to_free_pages+0x11d/0x340
[ 44.103371] __alloc_pages_slowpath+0x303/0x6e2
[ 44.103373] ? release_pages+0x239/0x330
[ 44.103376] __alloc_pages_nodemask+0x1a7/0x1c0
[ 44.103378] do_anonymous_page+0xab/0x4f0
[ 44.103380] handle_mm_fault+0x531/0x8d0
[ 44.103383] ? __schedule+0x173/0x5b0
[ 44.103387] __do_page_fault+0x1ef/0x4e0
[ 44.103389] ? __do_page_fault+0x4e0/0x4e0
[ 44.103390] do_page_fault+0x1a/0x20
[ 44.103393] common_exception+0x6f/0x76
[ 44.103394] EIP: 0x80484be
[ 44.103395] EFLAGS: 00010202 CPU: 4
[ 44.103396] EAX: 00d66000 EBX: 80000000 ECX: 38b97008 EDX: 00000000
[ 44.103397] ESI: 7ff00000 EDI: 00000000 EBP: bfcd2948 ESP: bfcd2920
[ 44.103398] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 44.103399] Code: fe ff ff 83 e8 01 e9 6b fe ff ff ba 80 44 7f c1 89 f0 e8 90 66 01 00 0f 0b 83 e8 01 e9 ac fe ff ff ba 3c a5 7d c1 e8 7c 66 01 00 <0f> 0b 83 e8 01 e9 b4 fe ff ff 89 f0 e8 4c 3a 00 00 83 e8 01 e9
[ 44.103425] EIP: isolate_lru_page+0x234/0x260 SS:ESP: 0068:ee30fa64
[ 44.103427] ---[ end trace e79ca6d793be8d54 ]---
[ 44.300720] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[ 44.303579] Mem-Info:
[ 44.305289] active_anon:690488 inactive_anon:2081 isolated_anon:0
[ 44.305289] active_file:508 inactive_file:529 isolated_file:27
[ 44.305289] unevictable:0 dirty:0 writeback:662 unstable:0
[ 44.305289] slab_reclaimable:1410 slab_unreclaimable:20537
[ 44.305289] mapped:459 shmem:2151 pagetables:11526 bounce:0
[ 44.305289] free:30998 free_pcp:59 free_cma:0
[ 44.322423] Node 0 active_anon:2761952kB inactive_anon:8324kB active_file:2032kB inactive_file:2116kB unevictable:0kB isolated(anon):0kB isolated(file):108kB mapped:1836kB dirty:0kB writeback:2648kB shmem:8604kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 323584kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
[ 44.336597] DMA free:12708kB min:788kB low:984kB high:1180kB active_anon:3192kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:15992kB managed:15916kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
[ 44.349286] lowmem_reserve[]: 0 812 2996 2996
[ 44.352127] Normal free:110912kB min:41308kB low:51632kB high:61956kB active_anon:547592kB inactive_anon:0kB active_file:300kB inactive_file:236kB unevictable:0kB writepending:352kB present:892920kB managed:831668kB mlocked:0kB kernel_stack:23088kB pagetables:46104kB bounce:0kB free_pcp:108kB local_pcp:0kB free_cma:0kB
[ 44.367461] lowmem_reserve[]: 0 0 17471 17471
[ 44.370437] HighMem free:372kB min:512kB low:28280kB high:56048kB active_anon:2210712kB inactive_anon:8324kB active_file:1312kB inactive_file:1724kB unevictable:0kB writepending:1176kB present:2236360kB managed:2236360kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:128kB local_pcp:0kB free_cma:0kB
[ 44.386249] lowmem_reserve[]: 0 0 0 0
[ 44.389137] DMA: 13*4kB (UM) 2*8kB (UM) 2*16kB (UM) 0*32kB 3*64kB (UM) 1*128kB (U) 2*256kB (UM) 1*512kB (M) 1*1024kB (U) 1*2048kB (U) 2*4096kB (M) = 12708kB
[ 44.397316] Normal: 377*4kB (UM) 382*8kB (UME) 274*16kB (UE) 95*32kB (UME) 39*64kB (UME) 14*128kB (UME) 12*256kB (UME) 3*512kB (ME) 0*1024kB 2*2048kB (ME) 21*4096kB (M) = 110996kB
[ 44.406379] HighMem: 0*4kB 1*8kB (M) 3*16kB (M) 2*32kB (M) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 120kB
[ 44.413805] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=4096kB
[ 44.421438] 3325 total pagecache pages
[ 44.424507] 0 pages in swap cache
[ 44.427416] Swap cache stats: add 0, delete 0, find 0/0
[ 44.431158] Free swap = 0kB
[ 44.433919] Total swap = 0kB
[ 44.436623] 786318 pages RAM
[ 44.439339] 559090 pages HighMem/MovableOnly
[ 44.442496] 15332 pages reserved
[ 44.445283] 0 pages cma reserved
[ 44.448070] Out of memory: Kill process 962 (a.out) score 32 or sacrifice child
[ 44.452335] Killed process 1167 (a.out) total-vm:2108kB, anon-rss:60kB, file-rss:0kB, shmem-rss:0kB
----------------------------------------
So far I can reproduce this problem when running a guest on an i7-2630QM (8 core) host
but not on an i5-4440S (4 core) host. Thus, maybe this is an architecture specific problem.
----------------------------------------
1c1
< Linux version 4.15.0-rc6+ (root@localhost.localdomain) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)) #258 SMP Thu Jan 4 16:19:44 JST 2018
---
> Linux version 4.15.0-rc6+ (root@localhost.localdomain) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)) #195 SMP Fri Jan 5 21:10:49 JST 2018
26c26
< vmware: TSC freq read from hypervisor : 1995.458 MHz
---
> vmware: TSC freq read from hypervisor : 2793.542 MHz
28c28
< vmware: using sched offset of 5372044450 ns
---
> vmware: using sched offset of 57103384027 ns
36c36
< RAMDISK: [mem 0x35fb5000-0x36fd2fff]
---
> RAMDISK: [mem 0x35fda000-0x36fe4fff]
39c39
< ACPI: XSDT 0x00000000BFEF00CB 00005C (v01 INTEL 440BX 06040000 VMW 01324272)
---
> ACPI: XSDT 0x00000000BFEF02EF 00005C (v01 INTEL 440BX 06040000 VMW 01324272)
41c41
< ACPI: DSDT 0x00000000BFEF0405 00EA6E (v01 PTLTD Custom 06040000 MSFT 03000001)
---
> ACPI: DSDT 0x00000000BFEF05B1 00E8C2 (v01 PTLTD Custom 06040000 MSFT 03000001)
44,49c44,49
< ACPI: BOOT 0x00000000BFEF03DD 000028 (v01 PTLTD $SBFTBL$ 06040000 LTP 00000001)
< ACPI: APIC 0x00000000BFEF032B 0000B2 (v01 PTLTD ? APIC 06040000 LTP 00000000)
< ACPI: MCFG 0x00000000BFEF02EF 00003C (v01 PTLTD $PCITBL$ 06040000 LTP 00000001)
< ACPI: SRAT 0x00000000BFEF01C7 000128 (v02 VMWARE MEMPLUG 06040000 VMW 00000001)
< ACPI: HPET 0x00000000BFEF018F 000038 (v01 VMWARE VMW HPET 06040000 VMW 00000001)
< ACPI: WAET 0x00000000BFEF0167 000028 (v01 VMWARE VMW WAET 06040000 VMW 00000001)
---
> ACPI: BOOT 0x00000000BFEF0589 000028 (v01 PTLTD $SBFTBL$ 06040000 LTP 00000001)
> ACPI: APIC 0x00000000BFEF050F 00007A (v01 PTLTD ? APIC 06040000 LTP 00000000)
> ACPI: MCFG 0x00000000BFEF04D3 00003C (v01 PTLTD $PCITBL$ 06040000 LTP 00000001)
> ACPI: SRAT 0x00000000BFEF03EB 0000E8 (v02 VMWARE MEMPLUG 06040000 VMW 00000001)
> ACPI: HPET 0x00000000BFEF03B3 000038 (v01 VMWARE VMW HPET 06040000 VMW 00000001)
> ACPI: WAET 0x00000000BFEF038B 000028 (v01 VMWARE VMW WAET 06040000 VMW 00000001)
54d53
< crashkernel: memory value expected
72,75d70
< ACPI: LAPIC_NMI (acpi_id[0x04] high edge lint[0x1])
< ACPI: LAPIC_NMI (acpi_id[0x05] high edge lint[0x1])
< ACPI: LAPIC_NMI (acpi_id[0x06] high edge lint[0x1])
< ACPI: LAPIC_NMI (acpi_id[0x07] high edge lint[0x1])
79c74
< smpboot: Allowing 8 CPUs, 0 hotplug CPUs
---
> smpboot: Allowing 4 CPUs, 0 hotplug CPUs
87c82
< setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:8 nr_node_ids:1
---
> setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:4 nr_node_ids:1
90c85
< Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-rc6+ root=UUID=dcfdc514-ddcb-4f0c-bddf-e229701a66e5 ro crashkernel=auto sysrq_always_enabled console=ttyS0,115200n8 console=tty0 LANG=en_US.UTF-8
---
> Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-rc6+ root=UUID=c6605616-f00a-4630-97c1-847f8e0c850f ro security=none sysrq_always_enabled console=ttyS0,115200n8 console=tty0
97c92
< Memory: 3085040K/3145272K available (6360K kernel code, 391K rwdata, 2408K rodata, 640K init, 1280K bss, 60232K reserved, 0K cma-reserved, 2236360K highmem)
---
> Memory: 3085528K/3145272K available (6385K kernel code, 388K rwdata, 2416K rodata, 644K init, 1280K bss, 59744K reserved, 0K cma-reserved, 2236360K highmem)
104,106c99,101
< .init : 0xc1907000 - 0xc19a7000 ( 640 kB)
< .data : 0xc1636011 - 0xc18f6f60 (2819 kB)
< .text : 0xc1000000 - 0xc1636011 (6360 kB)
---
> .init : 0xc190f000 - 0xc19b0000 ( 644 kB)
> .data : 0xc163c611 - 0xc18ff060 (2826 kB)
> .text : 0xc1000000 - 0xc163c611 (6385 kB)
108c103
< SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1
---
> SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
110c105,107
< NR_IRQS: 2304, nr_irqs: 488, preallocated irqs: 16
---
> RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
> RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
> NR_IRQS: 2304, nr_irqs: 456, preallocated irqs: 16
119,120c116,117
< tsc: Detected 1995.458 MHz processor
< Calibrating delay loop (skipped) preset value.. 3990.91 BogoMIPS (lpj=1995458)
---
> tsc: Detected 2793.542 MHz processor
> Calibrating delay loop (skipped) preset value.. 5587.08 BogoMIPS (lpj=2793542)
129,130c126,127
< Last level iTLB entries: 4KB 512, 2MB 8, 4MB 8
< Last level dTLB entries: 4KB 512, 2MB 32, 4MB 32, 1GB 0
---
> Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024
> Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4
132,133c129,130
< smpboot: CPU0: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz (family: 0x6, model: 0x2a, stepping: 0x7)
< Performance Events: SandyBridge events, core PMU driver.
---
> smpboot: CPU0: Intel(R) Core(TM) i5-4440S CPU @ 2.80GHz (family: 0x6, model: 0x3c, stepping: 0x3)
> Performance Events: Haswell events, core PMU driver.
143c140
< ... generic registers: 4
---
> ... generic registers: 8
147c144
< ... event mask: 000000000000000f
---
> ... event mask: 00000000000000ff
166,188c163,165
< #4
< Initializing CPU#4
< Disabled fast string operations
< mce: CPU supports 0 MCE banks
< smpboot: CPU 4 Converting physical 8 to logical package 4
< #5
< Initializing CPU#5
< Disabled fast string operations
< mce: CPU supports 0 MCE banks
< smpboot: CPU 5 Converting physical 10 to logical package 5
< #6
< Initializing CPU#6
< Disabled fast string operations
< mce: CPU supports 0 MCE banks
< smpboot: CPU 6 Converting physical 12 to logical package 6
< #7
< Initializing CPU#7
< Disabled fast string operations
< mce: CPU supports 0 MCE banks
< smpboot: CPU 7 Converting physical 14 to logical package 7
< smp: Brought up 1 node, 8 CPUs
< smpboot: Max logical packages: 8
< smpboot: Total of 8 processors activated (31927.32 BogoMIPS)
---
> smp: Brought up 1 node, 4 CPUs
> smpboot: Max logical packages: 4
> smpboot: Total of 4 processors activated (22348.33 BogoMIPS)
192c169
< futex hash table entries: 2048 (order: 4, 65536 bytes)
---
> futex hash table entries: 1024 (order: 3, 32768 bytes)
----------------------------------------
Reproducer is simple. Put the system under memory pressure
while writing to a file on XFS filesystem.
----------------------------------------
#define _FILE_OFFSET_BITS 64
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
static void run(void)
{
unsigned long long size;
char *buf = NULL;
unsigned long long i;
for (i = 0; i < 24; i++) {
if (fork() == 0) {
static char buf[4096];
int fd;
snprintf(buf, sizeof(buf), "file.%u", getpid());
fd = open(buf, O_CREAT | O_WRONLY | O_APPEND, 0600);
while (write(fd, buf, sizeof(buf)) == sizeof(buf));
close(fd);
_exit(0);
}
}
for (size = 1048576; size < 512ULL * (1 << 30); size += 1048576) {
char *cp = realloc(buf, size);
if (!cp) {
size -= 1048576;
break;
}
buf = cp;
}
for (i = 0; i < size; i += 4096)
buf[i] = 0;
_exit(0);
}
int main(int argc, char *argv[])
{
if (argc != 1)
run();
else
while (1)
if (fork() == 0)
execlp(argv[0], argv[0], "", NULL);
return 0;
}
----------------------------------------
Do you have any clue?
(Since I need to use i7-2630QM for testing, I won't be able to test
until next Tuesday, sorry.)
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