Hi,
Today I got the below BUG in isolate_lru_pages() when building the kernel.
My current running kernel, which exhibits the BUG, is based on the mainline kernel's commit
262d6a9a63a3 ("Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip").
Looks nobody else reported the issue recently.
So far I only hit the BUG once and I don't know how to reproduce it again, so this is just a FYI.
Thanks,
-- Dexuan
The crash log is:
[ 1626.194411] ------------[ cut here ]------------
[ 1626.197031] kernel BUG at mm/vmscan.c:1689!
[ 1626.197031] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI
[ 1626.207112] CPU: 2 PID: 86 Comm: kswapd0 Not tainted 5.0.0+ #67
[ 1626.207112] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090008 12/07/2018
[ 1626.207112] RIP: 0010:isolate_lru_pages+0x4ab/0x4c0
[ 1626.207112] Code: e8 6a bc f1 ff 85 c0 75 e0 48 c7 c2 40 dc 03 af be 41 01 00 00 48 c7 c7 de ef 06 af c6 05 2e 6c 17 01 01 e8 d2 8c ef ff eb bf <0f> 0b e8 be 50 e9 ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f
[ 1626.245025] RSP: 0000:ffffa051c0c73ac8 EFLAGS: 00010082
[ 1626.258863] RAX: 00000000ffffffea RBX: ffff8cdb229afc20 RCX: dead000000000200
[ 1626.258863] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffe0f803543000
[ 1626.258863] RBP: 000000000000000c R08: ffffe0f8033c2708 R09: 0000000000000002
[ 1626.258863] R10: 0000000000000001 R11: 0000000000000001 R12: 000000000000000b
[ 1626.258863] R13: 000000000000000b R14: ffffa051c0c73de0 R15: ffffe0f803543008
[ 1626.258863] FS: 0000000000000000(0000) GS:ffff8cdb43280000(0000) knlGS:0000000000000000
[ 1626.258863] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1626.303683] CR2: 0000563ea696da18 CR3: 00000000e07f0005 CR4: 00000000003606e0
[ 1626.303683] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1626.303683] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1626.303683] Call Trace:
[ 1626.327319] shrink_inactive_list+0xf9/0x700
[ 1626.327319] ? __lock_acquire+0x42d/0x1190
[ 1626.327319] ? inactive_list_is_low+0x77/0x2c0
[ 1626.327319] shrink_node_memcg+0x206/0x780
[ 1626.327319] ? percpu_ref_put_many+0x8c/0x130
[ 1626.327319] ? percpu_ref_put_many+0x8c/0x130
[ 1626.327319] shrink_node+0xcf/0x470
[ 1626.355957] balance_pgdat+0x2d9/0x560
[ 1626.355957] kswapd+0x263/0x560
[ 1626.355957] ? finish_wait+0x80/0x80
[ 1626.355957] ? balance_pgdat+0x560/0x560
[ 1626.355957] kthread+0x11b/0x140
[ 1626.373956] ? kthread_create_on_node+0x60/0x60
[ 1626.373956] ret_from_fork+0x24/0x30
[ 1626.373956] Modules linked in: crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 crypto_simd cryptd glue_helper serio_raw hyperv_fb evdev autofs4 hid_generic hid_hyperv hv_netvsc hyperv_keyboard hid psmouse i2c_piix4 hv_vmbus atkbd i2c_core
[ 1626.373956] ---[ end trace b148bf262999856d ]---
[ 1626.373956] RIP: 0010:isolate_lru_pages+0x4ab/0x4c0
[ 1626.373956] Code: e8 6a bc f1 ff 85 c0 75 e0 48 c7 c2 40 dc 03 af be 41 01 00 00 48 c7 c7 de ef 06 af c6 05 2e 6c 17 01 01 e8 d2 8c ef ff eb bf <0f> 0b e8 be 50 e9 ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f
[ 1626.373956] RSP: 0000:ffffa051c0c73ac8 EFLAGS: 00010082
[ 1626.373956] RAX: 00000000ffffffea RBX: ffff8cdb229afc20 RCX: dead000000000200
[ 1626.373956] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffe0f803543000
[ 1626.373956] RBP: 000000000000000c R08: ffffe0f8033c2708 R09: 0000000000000002
[ 1626.373956] R10: 0000000000000001 R11: 0000000000000001 R12: 000000000000000b
[ 1626.373956] R13: 000000000000000b R14: ffffa051c0c73de0 R15: ffffe0f803543008
[ 1626.373956] FS: 0000000000000000(0000) GS:ffff8cdb43280000(0000) knlGS:0000000000000000
[ 1626.373956] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1626.373956] CR2: 0000563ea696da18 CR3: 00000000e07f0005 CR4: 00000000003606e0
[ 1626.373956] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1626.373956] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1626.373956] BUG: sleeping function called from invalid context at include/linux/percpu-rwsem.h:34
[ 1626.373956] in_atomic(): 1, irqs_disabled(): 1, pid: 86, name: kswapd0
[ 1626.373956] INFO: lockdep is turned off.
[ 1626.373956] irq event stamp: 998186
[ 1626.373956] hardirqs last enabled at (998185): [<ffffffffae830669>] _raw_spin_unlock_irq+0x29/0x50
[ 1626.373956] hardirqs last disabled at (998186): [<ffffffffae8303ff>] _raw_spin_lock_irq+0xf/0x40
[ 1626.520571] softirqs last enabled at (993564): [<ffffffffaec0038b>] __do_softirq+0x38b/0x498
[ 1626.520571] softirqs last disabled at (993557): [<ffffffffae0796db>] irq_exit+0xdb/0xf0
[ 1626.520571] Preemption disabled at:
[ 1626.520571] [<0000000000000000>] (null)
[ 1626.520571] CPU: 2 PID: 86 Comm: kswapd0 Tainted: G D 5.0.0+ #67
[ 1626.520571] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090008 12/07/2018
[ 1626.520571] Call Trace:
[ 1626.520571] dump_stack+0x67/0x90
[ 1626.520571] ___might_sleep.cold.78+0xf0/0x104
[ 1626.520571] exit_signals+0x30/0x2d0
[ 1626.520571] ? finish_wait+0x80/0x80
[ 1626.520571] do_exit+0xb0/0xc90
[ 1626.520571] ? balance_pgdat+0x560/0x560
[ 1626.520571] ? kthread+0x11b/0x140
[ 1626.520571] rewind_stack_do_exit+0x17/0x20
[ 1626.579941] note: kswapd0[86] exited with preempt_count 1
[ 1691.170873] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 1691.174869] rcu: 5-...0: (6 ticks this GP) idle=4e2/1/0x4000000000000000 softirq=19854/19854 fqs=8114 last_accelerate: 0dd1/4d4e, Nonlazy posted: .L.
[ 1691.174869] rcu: (detected by 1, t=16254 jiffies, g=163449, q=3759)
[ 1691.174869] Sending NMI from CPU 1 to CPUs 5:
[ 1691.174869] NMI backtrace for cpu 5
[ 1691.174869] CPU: 5 PID: 6477 Comm: ld Tainted: G D W 5.0.0+ #67
[ 1691.174869] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090008 12/07/2018
[ 1691.174869] RIP: 0010:queued_spin_lock_slowpath+0x2b/0x1e0
[ 1691.174869] Code: 1f 44 00 00 41 54 55 53 48 89 fb 0f 1f 44 00 00 ba 01 00 00 00 8b 03 85 c0 75 0d f0 0f b1 13 85 c0 75 f2 5b 5d 41 5c c3 f3 90 <eb> e9 81 fe 00 01 00 00 74 44 81 e6 00 ff ff ff 75 71 f0 0f ba 2b
[ 1691.174869] RSP: 0018:ffffa051c8dafb88 EFLAGS: 00000002
[ 1691.174869] RAX: 0000000000000001 RBX: ffff8cdb47804b80 RCX: 605139ec00000000
[ 1691.174869] RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8cdb47804b80
[ 1691.174869] RBP: 0000000000000246 R08: 0000000091512c45 R09: 0000000000000001
[ 1691.174869] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
[ 1691.174869] R13: ffffffffae1d4fe0 R14: ffff8cdb47800000 R15: ffffe0f8030067c0
[ 1691.174869] FS: 00007f9b6e162b80(0000) GS:ffff8cdb43340000(0000) knlGS:0000000000000000
[ 1691.174869] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1691.174869] CR2: 00007f9b5648b000 CR3: 00000000e07f0006 CR4: 00000000003606e0
[ 1691.174869] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1691.174869] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1691.174869] Call Trace:
[ 1691.174869] do_raw_spin_lock+0xab/0xb0
[ 1691.174869] _raw_spin_lock_irqsave+0x40/0x50
[ 1691.174869] ? pagevec_lru_move_fn+0x6c/0xd0
[ 1691.174869] pagevec_lru_move_fn+0x6c/0xd0
[ 1691.174869] __lru_cache_add+0x6b/0xa0
[ 1691.174869] add_to_page_cache_lru+0x76/0xc0
[ 1691.174869] pagecache_get_page+0xf2/0x2d0
[ 1691.174869] grab_cache_page_write_begin+0x1c/0x40
[ 1691.174869] ext4_da_write_begin+0xe5/0x500
[ 1691.174869] generic_perform_write+0xf4/0x1c0
[ 1691.174869] __generic_file_write_iter+0xfa/0x1c0
[ 1691.174869] ? generic_write_checks+0x4c/0xb0
[ 1691.174869] ext4_file_write_iter+0xc6/0x3f0
[ 1691.174869] new_sync_write+0x115/0x180
[ 1691.174869] vfs_write+0xb7/0x1b0
[ 1691.174869] ksys_write+0x52/0xc0
[ 1691.174869] do_syscall_64+0x5e/0x200
[ 1691.174869] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 1691.174869] RIP: 0033:0x7f9b6e48afd4
[ 1691.174869] Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00 00 00 00 48 8d 05 29 f7 0d 00 8b 00 85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89 f5 53
[ 1691.174869] RSP: 002b:00007ffcb3925b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1691.174869] RAX: ffffffffffffffda RBX: 000000000dfd4000 RCX: 00007f9b6e48afd4
[ 1691.174869] RDX: 000000000dfd4000 RSI: 00007f9b5e07a3a0 RDI: 000000000000004e
[ 1691.174869] RBP: 00007f9b5e07a3a0 R08: 000000000dfd4000 R09: 0000000000000000
[ 1691.174869] R10: 000000000000000d R11: 0000000000000246 R12: 0000563ea61763a0
[ 1691.174869] R13: 000000000dfd4000 R14: 000000000dfd4e20 R15: 00007f9b6e561760
