On (23/01/13 11:57), Mike Kravetz wrote: > Hi Sergey, > > The following BUG shows up after this series in linux-next. I can easily > recreate by doing the following: > > # echo large_value > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages > where 'large_value' is a so big that there could never possibly be that > many 2MB huge pages in the system. I get migration warnins with the zsmalloc series reverted. I guess the problem is somewhere else. Can you double check on you side? [ 87.208255] ------------[ cut here ]------------ [ 87.209431] WARNING: CPU: 18 PID: 300 at mm/migrate.c:995 move_to_new_folio+0x1ef/0x260 [ 87.211993] Modules linked in: deflate zlib_deflate zstd zstd_compress zram [ 87.214287] CPU: 18 PID: 300 Comm: kcompactd0 Tainted: G N 6.2.0-rc3-next-20230113+ #385 [ 87.217529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014 [ 87.220131] RIP: 0010:move_to_new_folio+0x1ef/0x260 [ 87.221892] Code: 84 c0 74 78 48 8b 43 18 44 89 ea 48 89 de 4c 89 e7 ff 50 06 85 c0 0f 85 a9 fe ff ff 48 8b 03 a9 00 00 04 00 0f 85 7a fe ff ff <0f> 0b e9 73 fe ff ff 48 8b 03 f6 c4 20 74 2a be c0 0c 00 00 48 89 [ 87.226514] RSP: 0018:ffffc90000b9fb08 EFLAGS: 00010246 [ 87.227879] RAX: 4000000000000021 RBX: ffffea0000890500 RCX: 0000000000000000 [ 87.230948] RDX: 0000000000000000 RSI: ffffffff81e6f950 RDI: ffffea0000890500 [ 87.233026] RBP: ffffea0000890500 R08: 0000001e82ec3c3e R09: 0000000000000001 [ 87.235517] R10: 00000000ffffffff R11: 00000000ffffffff R12: ffffea00015a26c0 [ 87.237807] R13: 0000000000000001 R14: ffffea00015a2680 R15: ffffea00008904c0 [ 87.239438] FS: 0000000000000000(0000) GS:ffff888624200000(0000) knlGS:0000000000000000 [ 87.241303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.242627] CR2: 00007fe537ebbdb8 CR3: 0000000110a0a004 CR4: 0000000000770ee0 [ 87.244283] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.245913] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.247559] PKRU: 55555554 [ 87.248269] Call Trace: [ 87.248862] <TASK> [ 87.249370] ? lock_is_held_type+0xd9/0x130 [ 87.250377] migrate_pages_batch+0x553/0xc80 [ 87.251513] ? move_freelist_tail+0xc0/0xc0 [ 87.252545] ? isolate_freepages+0x290/0x290 [ 87.253654] ? trace_mm_migrate_pages+0xf0/0xf0 [ 87.254901] migrate_pages+0x1ae/0x330 [ 87.255877] ? isolate_freepages+0x290/0x290 [ 87.257015] ? move_freelist_tail+0xc0/0xc0 [ 87.258213] compact_zone+0x528/0x6a0 [ 87.260911] proactive_compact_node+0x87/0xd0 [ 87.262090] kcompactd+0x1ca/0x360 [ 87.263018] ? swake_up_all+0xe0/0xe0 [ 87.264101] ? kcompactd_do_work+0x240/0x240 [ 87.265243] kthread+0xec/0x110 [ 87.266031] ? kthread_complete_and_exit+0x20/0x20 [ 87.267268] ret_from_fork+0x1f/0x30 [ 87.268243] </TASK> [ 87.268984] irq event stamp: 311113 [ 87.269930] hardirqs last enabled at (311125): [<ffffffff810da6c2>] __up_console_sem+0x52/0x60 [ 87.272235] hardirqs last disabled at (311134): [<ffffffff810da6a7>] __up_console_sem+0x37/0x60 [ 87.275707] softirqs last enabled at (311088): [<ffffffff819d2b2c>] __do_softirq+0x21c/0x31f [ 87.278450] softirqs last disabled at (311083): [<ffffffff81070b8d>] __irq_exit_rcu+0xad/0x120 [ 87.280555] ---[ end trace 0000000000000000 ]---
