Op 22-10-15 om 10:47 schreef [email protected]:
> From: Filipe Manana <[email protected]>
>
> In the kernel 4.2 merge window we had a refactoring/rework of the delayed
> references implementation in order to fix certain problems with qgroups.
> However that rework introduced one more regression that leads to the
> following trace when running delayed references for metadata:
>
> [35908.064664] kernel BUG at fs/btrfs/extent-tree.c:1832!
> [35908.065201] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> [35908.065201] Modules linked in: dm_flakey dm_mod btrfs crc32c_generic xor
> raid6_pq nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc
> loop fuse parport_pc psmouse i2
> [35908.065201] CPU: 14 PID: 15014 Comm: kworker/u32:9 Tainted: G W
> 4.3.0-rc5-btrfs-next-17+ #1
> [35908.065201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
> rel-1.8.1-0-g4adadbd-20150316_085822-nilsson.home.kraxel.org 04/01/2014
> [35908.065201] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
> [35908.065201] task: ffff880114b7d780 ti: ffff88010c4c8000 task.ti:
> ffff88010c4c8000
> [35908.065201] RIP: 0010:[<ffffffffa04928b5>] [<ffffffffa04928b5>]
> insert_inline_extent_backref+0x52/0xb1 [btrfs]
> [35908.065201] RSP: 0018:ffff88010c4cbb08 EFLAGS: 00010293
> [35908.065201] RAX: 0000000000000000 RBX: ffff88008a661000 RCX:
> 0000000000000000
> [35908.065201] RDX: ffffffffa04dd58f RSI: 0000000000000001 RDI:
> 0000000000000000
> [35908.065201] RBP: ffff88010c4cbb40 R08: 0000000000001000 R09:
> ffff88010c4cb9f8
> [35908.065201] R10: 0000000000000000 R11: 000000000000002c R12:
> 0000000000000000
> [35908.065201] R13: ffff88020a74c578 R14: 0000000000000000 R15:
> 0000000000000000
> [35908.065201] FS: 0000000000000000(0000) GS:ffff88023edc0000(0000)
> knlGS:0000000000000000
> [35908.065201] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [35908.065201] CR2: 00000000015e8708 CR3: 0000000102185000 CR4:
> 00000000000006e0
> [35908.065201] Stack:
> [35908.065201] ffff88010c4cbb18 0000000000000f37 ffff88020a74c578
> ffff88015a408000
> [35908.065201] ffff880154a44000 0000000000000000 0000000000000005
> ffff88010c4cbbd8
> [35908.065201] ffffffffa0492b9a 0000000000000005 0000000000000000
> 0000000000000000
> [35908.065201] Call Trace:
> [35908.065201] [<ffffffffa0492b9a>] __btrfs_inc_extent_ref+0x8b/0x208 [btrfs]
> [35908.065201] [<ffffffffa0497117>] ? __btrfs_run_delayed_refs+0x4d4/0xd33
> [btrfs]
> [35908.065201] [<ffffffffa049773d>] __btrfs_run_delayed_refs+0xafa/0xd33
> [btrfs]
> [35908.065201] [<ffffffffa04a976a>] ? join_transaction.isra.10+0x25/0x41f
> [btrfs]
> [35908.065201] [<ffffffffa04a97ed>] ? join_transaction.isra.10+0xa8/0x41f
> [btrfs]
> [35908.065201] [<ffffffffa049914d>] btrfs_run_delayed_refs+0x75/0x1dd [btrfs]
> [35908.065201] [<ffffffffa04992f1>] delayed_ref_async_start+0x3c/0x7b [btrfs]
> [35908.065201] [<ffffffffa04d4b4f>] normal_work_helper+0x14c/0x32a [btrfs]
> [35908.065201] [<ffffffffa04d4e93>] btrfs_extent_refs_helper+0x12/0x14
> [btrfs]
> [35908.065201] [<ffffffff81063b23>] process_one_work+0x24a/0x4ac
> [35908.065201] [<ffffffff81064285>] worker_thread+0x206/0x2c2
> [35908.065201] [<ffffffff8106407f>] ? rescuer_thread+0x2cb/0x2cb
> [35908.065201] [<ffffffff8106407f>] ? rescuer_thread+0x2cb/0x2cb
> [35908.065201] [<ffffffff8106904d>] kthread+0xef/0xf7
> [35908.065201] [<ffffffff81068f5e>] ? kthread_parkme+0x24/0x24
> [35908.065201] [<ffffffff8147d10f>] ret_from_fork+0x3f/0x70
> [35908.065201] [<ffffffff81068f5e>] ? kthread_parkme+0x24/0x24
> [35908.065201] Code: 6a 01 41 56 41 54 ff 75 10 41 51 4d 89 c1 49 89 c8 48 8d
> 4d d0 e8 f6 f1 ff ff 48 83 c4 28 85 c0 75 2c 49 81 fc ff 00 00 00 77 02 <0f>
> 0b 4c 8b 45 30 8b 4d 28 45 31
> [35908.065201] RIP [<ffffffffa04928b5>]
> insert_inline_extent_backref+0x52/0xb1 [btrfs]
> [35908.065201] RSP <ffff88010c4cbb08>
> [35908.310885] ---[ end trace fe4299baf0666457 ]---
Would this also solve this:
Oct 22 12:03:20 beast kernel: WARNING: CPU: 5 PID: 323 at lib/list_debug.c:62
__list_del_entry+0x5a/0x98()
Oct 22 12:03:20 beast kernel: list_del corruption. next->prev should be
ffff88033f864500, but was ffff88033f8642c0
Oct 22 12:03:20 beast kernel: Modules linked in: arc4 md4 nls_utf8 cifs
dns_resolver fscache ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack veth loop b43
mac80211 cfg80211 ssb mmc_core kvm_intel kvm crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel serio_raw sb_edac edac_core i2c_i801 btusb btrtl btintel
btbcm bluetooth joydev bcma rfkill cp210x tpm_infineon tpm_tis tpm
sch_fq_codel radeon crc32c_intel ttm drm_kms_helper
Oct 22 12:03:20 beast kernel: CPU: 5 PID: 323 Comm: kworker/u16:12 Tainted: G
W 4.2.2 #50
Oct 22 12:03:20 beast kernel: Hardware name: System manufacturer System
Product Name/X79-DELUXE, BIOS 0901 06/20/2014
Oct 22 12:03:20 beast kernel: Workqueue: btrfs-delalloc btrfs_delalloc_helper
Oct 22 12:03:20 beast kernel: 0000000000000009 ffff88013993fb98
ffffffff8170b663 0000000000000006
Oct 22 12:03:20 beast kernel: ffff88013993fbe8 ffff88013993fbd8
ffffffff8106aa40 ffff88013993fc78
Oct 22 12:03:20 beast kernel: ffffffff813392c3 ffff88033f864480
ffff88033f864500 ffff880ba968d510
Oct 22 12:03:20 beast kernel: Call Trace:
Oct 22 12:03:20 beast kernel: [<ffffffff8170b663>] dump_stack+0x45/0x57
Oct 22 12:03:20 beast kernel: [<ffffffff8106aa40>]
warn_slowpath_common+0xa1/0xbb
Oct 22 12:03:20 beast kernel: [<ffffffff813392c3>] ? __list_del_entry+0x5a/0x98
Oct 22 12:03:20 beast kernel: [<ffffffff8106aaa0>] warn_slowpath_fmt+0x46/0x48
Oct 22 12:03:20 beast kernel: [<ffffffff811699ba>] ?
kmem_cache_alloc+0x56/0x10b
Oct 22 12:03:20 beast kernel: [<ffffffff813392c3>] __list_del_entry+0x5a/0x98
Oct 22 12:03:20 beast kernel: [<ffffffff8127063d>]
remove_extent_mapping+0x4d/0x65
Oct 22 12:03:20 beast kernel: [<ffffffff8126d38f>]
btrfs_drop_extent_cache+0x34f/0x388
Oct 22 12:03:20 beast kernel: [<ffffffff8124edb5>] ?
btrfs_reserve_extent+0x75/0x120
Oct 22 12:03:20 beast kernel: [<ffffffff81264380>]
submit_compressed_extents+0x1c8/0x430
Oct 22 12:03:20 beast kernel: [<ffffffff8126466f>] async_cow_submit+0x87/0x8c
Oct 22 12:03:20 beast kernel: [<ffffffff81284fe2>]
normal_work_helper+0x125/0x1c5
Oct 22 12:03:20 beast kernel: [<ffffffff812850a8>]
btrfs_delalloc_helper+0x12/0x14
Oct 22 12:03:20 beast kernel: [<ffffffff8107d91c>] process_one_work+0x165/0x29a
Oct 22 12:03:20 beast kernel: [<ffffffff8107ded4>] worker_thread+0x1ef/0x29a
Oct 22 12:03:20 beast kernel: [<ffffffff8107dce5>] ? rescuer_thread+0x265/0x265
Oct 22 12:03:20 beast kernel: [<ffffffff8107dce5>] ? rescuer_thread+0x265/0x265
Oct 22 12:03:20 beast kernel: [<ffffffff810820e1>] kthread+0xb7/0xbf
Oct 22 12:03:20 beast kernel: [<ffffffff8108202a>] ? kthread_parkme+0x24/0x24
Oct 22 12:03:20 beast kernel: [<ffffffff817121cf>] ret_from_fork+0x3f/0x70
Oct 22 12:03:20 beast kernel: [<ffffffff8108202a>] ? kthread_parkme+0x24/0x24
Oct 22 12:03:20 beast kernel: ---[ end trace 395ca73acb05ecbc ]---
Using the following kernel: Linux beast 4.2.2 #50 SMP Wed Sep 30 13:42:29 CEST
2015 x86_64 GNU/Linux
The above trace shows up every few minutes, basically during every rsync.
regards,
Koen
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