Hi Josef,
I hit a warning with this patch on top of the current cmason/for-linus
branch. Takes about 15 minutes to produce when running xfstest 278 in
a loop and, in another shell, doing fsstress on the same volume to
force metadata modifications.
fs/btrfs/extent-tree.c
...
5032 } else if (ret == -ENOENT) {
5033 btrfs_print_leaf(extent_root, path->nodes[0]);
5034 WARN_ON(1);
5035 printk(KERN_ERR "btrfs unable to find ref byte nr %llu "
5036 "parent %llu root %llu owner %llu offset %llu\n",
5037 (unsigned long long)bytenr,
5038 (unsigned long long)parent,
5039 (unsigned long long)root_objectid,
5040 (unsigned long long)owner_objectid,
5041 (unsigned long long)owner_offset);
5042 } else {
<6>[469120.918975] leaf 133349376 total ptrs 36 free space 1187
<6>[469120.918978] item 0 key (1070149632 a8 53248) itemoff 3942 itemsize 53
<6>[469120.918981] extent refs 1 gen 358 flags 1
<6>[469120.918983] extent data backref root 5 objectid 40286 offset 0 count 1
<6>[469120.918986] item 1 key (1070202880 a8 53248) itemoff 3889 itemsize 53
<6>[469120.918988] extent refs 1 gen 358 flags 1
<6>[469120.918989] extent data backref root 5 objectid 40287 offset 0 count 1
<6>[469120.918992] item 2 key (1070256128 a8 53248) itemoff 3836 itemsize 53
<6>[469120.918994] extent refs 1 gen 358 flags 1
<6>[469120.918996] extent data backref root 5 objectid 40288 offset 0 count 1
<6>[469120.918998] item 3 key (1070309376 a8 53248) itemoff 3783 itemsize 53
<6>[469120.919000] extent refs 1 gen 358 flags 1
<6>[469120.919002] extent data backref root 5 objectid 40289 offset 0 count 1
<6>[469120.919004] item 4 key (1070362624 a8 53248) itemoff 3730 itemsize 53
<6>[469120.919006] extent refs 1 gen 358 flags 1
<6>[469120.919008] extent data backref root 5 objectid 40290 offset 0 count 1
<6>[469120.919010] item 5 key (1070415872 a8 53248) itemoff 3677 itemsize 53
<6>[469120.919012] extent refs 1 gen 358 flags 1
<6>[469120.919014] extent data backref root 5 objectid 40291 offset 0 count 1
<6>[469120.919016] item 6 key (1070469120 a8 53248) itemoff 3624 itemsize 53
<6>[469120.919018] extent refs 1 gen 358 flags 1
<6>[469120.919020] extent data backref root 5 objectid 40292 offset 0 count 1
<6>[469120.919022] item 7 key (1070522368 a8 53248) itemoff 3571 itemsize 53
<6>[469120.919024] extent refs 1 gen 358 flags 1
<6>[469120.919026] extent data backref root 5 objectid 40293 offset 0 count 1
<6>[469120.919028] item 8 key (1070575616 a8 53248) itemoff 3518 itemsize 53
<6>[469120.919030] extent refs 1 gen 358 flags 1
<6>[469120.919032] extent data backref root 5 objectid 40294 offset 0 count 1
<6>[469120.919034] item 9 key (1070628864 a8 53248) itemoff 3465 itemsize 53
<6>[469120.919036] extent refs 1 gen 358 flags 1
<6>[469120.919038] extent data backref root 5 objectid 40295 offset 0 count 1
<6>[469120.919040] item 10 key (1070682112 a8 53248) itemoff 3412 itemsize 53
<6>[469120.919042] extent refs 1 gen 358 flags 1
<6>[469120.919044] extent data backref root 5 objectid 40296 offset 0 count 1
<6>[469120.919046] item 11 key (1070735360 a8 53248) itemoff 3359 itemsize 53
<6>[469120.919048] extent refs 1 gen 358 flags 1
<6>[469120.919050] extent data backref root 5 objectid 40297 offset 0 count 1
<6>[469120.919052] item 12 key (1071714304 a8 32768) itemoff 3306 itemsize 53
<6>[469120.919054] extent refs 1 gen 791704 flags 1
<6>[469120.919056] extent data backref root 5 objectid 14760797 offset 475136 count 1
<6>[469120.919059] item 13 key (1071755264 a8 49152) itemoff 3253 itemsize 53
<6>[469120.919061] extent refs 1 gen 791702 flags 1
<6>[469120.919062] extent data backref root 5 objectid 14760670 offset 651264 count 1
<6>[469120.919065] item 14 key (1072099328 a8 258048) itemoff 3200 itemsize 53
<6>[469120.919067] extent refs 1 gen 791694 flags 1
<6>[469120.919069] extent data backref root 5 objectid 14760709 offset 548864 count 1
<6>[469120.919071] item 15 key (1072410624 a8 94208) itemoff 3147 itemsize 53
<6>[469120.919073] extent refs 1 gen 791690 flags 1
<6>[469120.919075] extent data backref root 5 objectid 14760670 offset 4096 count 1
<6>[469120.919077] item 16 key (1072635904 a8 86016) itemoff 3094 itemsize 53
<6>[469120.919079] extent refs 1 gen 791697 flags 1
<6>[469120.919081] extent data backref root 5 objectid 14760652 offset 864256 count 1
<6>[469120.919084] item 17 key (1072734208 a8 102400) itemoff 3041 itemsize 53
<6>[469120.919086] extent refs 1 gen 791690 flags 1
<6>[469120.919088] extent data backref root 5 objectid 14760665 offset 937984 count 1
<6>[469120.919090] item 18 key (1072836608 a8 163840) itemoff 2988 itemsize 53
<6>[469120.919092] extent refs 1 gen 791697 flags 1
<6>[469120.919094] extent data backref root 5 objectid 14760641 offset 339968 count 1
<6>[469120.919096] item 19 key (1073119232 a8 106496) itemoff 2935 itemsize 53
<6>[469120.919098] extent refs 1 gen 791697 flags 1
<6>[469120.919100] extent data backref root 5 objectid 14760665 offset 688128 count 1
<6>[469120.919103] item 20 key (1073225728 a8 45056) itemoff 2882 itemsize 53
<6>[469120.919104] extent refs 1 gen 791699 flags 1
<6>[469120.919106] extent data backref root 5 objectid 14760674 offset 909312 count 1
<6>[469120.919109] item 21 key (1073270784 a8 69632) itemoff 2829 itemsize 53
<6>[469120.919111] extent refs 1 gen 791700 flags 1
<6>[469120.919113] extent data backref root 5 objectid 14760665 offset 3403776 count 1
<6>[469120.919115] item 22 key (1073356800 a8 73728) itemoff 2776 itemsize 53
<6>[469120.919117] extent refs 1 gen 791699 flags 1
<6>[469120.919119] extent data backref root 5 objectid 14760683 offset 1835008 count 1
<6>[469120.919121] item 23 key (1073430528 a8 57344) itemoff 2723 itemsize 53
<6>[469120.919123] extent refs 1 gen 791699 flags 1
<6>[469120.919125] extent data backref root 5 objectid 14760713 offset 266240 count 1
<6>[469120.919128] item 24 key (1073487872 a8 65536) itemoff 2670 itemsize 53
<6>[469120.919130] extent refs 1 gen 791700 flags 1
<6>[469120.919131] extent data backref root 1 objectid 260 offset 0 count 1
<6>[469120.919134] item 25 key (1073553408 a8 40960) itemoff 2617 itemsize 53
<6>[469120.919136] extent refs 1 gen 791701 flags 1
<6>[469120.919138] extent data backref root 5 objectid 14760660 offset 1241088 count 1
<6>[469120.919140] item 26 key (1073602560 a8 131072) itemoff 2564 itemsize 53
<6>[469120.919142] extent refs 1 gen 791691 flags 1
<6>[469120.919144] extent data backref root 5 objectid 14760686 offset 212992 count 1
<6>[469120.919146] item 27 key (1073733632 a8 180224) itemoff 2511 itemsize 53
<6>[469120.919148] extent refs 1 gen 791691 flags 1
<6>[469120.919150] extent data backref root 5 objectid 14760686 offset 32768 count 1
<6>[469120.919153] item 28 key (1073913856 a8 245760) itemoff 2458 itemsize 53
<6>[469120.919155] extent refs 3 gen 791691 flags 1
<6>[469120.919157] extent data backref root 5 objectid 14760686 offset 344064 count 3
<6>[469120.919159] item 29 key (1074159616 a8 131072) itemoff 2405 itemsize 53
<6>[469120.919161] extent refs 1 gen 791691 flags 1
<6>[469120.919163] extent data backref root 5 objectid 14760655 offset 147456 count 1
<6>[469120.919165] item 30 key (1074290688 a8 724992) itemoff 2352 itemsize 53
<6>[469120.919167] extent refs 1 gen 791693 flags 1
<6>[469120.919169] extent data backref root 5 objectid 14760673 offset 2031616 count 1
<6>[469120.919172] item 31 key (1075015680 a8 270336) itemoff 2299 itemsize 53
<6>[469120.919174] extent refs 1 gen 791704 flags 1
<6>[469120.919175] extent data backref root 5 objectid 14760728 offset 413696 count 1
<6>[469120.919178] item 32 key (1075625984 a8 126976) itemoff 2246 itemsize 53
<6>[469120.919180] extent refs 1 gen 791704 flags 1
<6>[469120.919182] extent data backref root 5 objectid 14760670 offset 1712128 count 1
<6>[469120.919184] item 33 key (1075867648 a8 61440) itemoff 2193 itemsize 53
<6>[469120.919186] extent refs 1 gen 791704 flags 1
<6>[469120.919188] extent data backref root 5 objectid 14760743 offset 512000 count 1
<6>[469120.919190] item 34 key (1075953664 a8 131072) itemoff 2140 itemsize 53
<6>[469120.919192] extent refs 1 gen 791698 flags 1
<6>[469120.919194] extent data backref root 5 objectid 14760673 offset 1437696 count 1
<6>[469120.919197] item 35 key (1076084736 a8 118784) itemoff 2087 itemsize 53
<6>[469120.919199] extent refs 1 gen 791704 flags 1
<6>[469120.919201] extent data backref root 5 objectid 14760683 offset 561152 count 1
<4>[469120.919202] ------------[ cut here ]------------
<4>[469120.919216] WARNING: at fs/btrfs/extent-tree.c:5034 __btrfs_free_extent+0x675/0x740 [btrfs]()
<4>[469120.919218] Hardware name: X8SIL
<4>[469120.919220] Modules linked in: btrfs mpt2sas scsi_transport_sas raid_class [last unloaded: btrfs]
<4>[469120.919228] Pid: 31351, comm: rm Tainted: G W 3.4.0+ #25
<4>[469120.919230] Call Trace:
<4>[469120.919235] [<ffffffff8108101a>] warn_slowpath_common+0x7a/0xb0
<4>[469120.919238] [<ffffffff81081065>] warn_slowpath_null+0x15/0x20
<4>[469120.919249] [<ffffffffa0136bc5>] __btrfs_free_extent+0x675/0x740 [btrfs]
<4>[469120.919260] [<ffffffffa01374fd>] run_clustered_refs+0x86d/0x9d0 [btrfs]
<4>[469120.919270] [<ffffffffa0137802>] btrfs_run_delayed_refs+0x1a2/0x500 [btrfs]
<4>[469120.919283] [<ffffffffa01485e5>] __btrfs_end_transaction+0xa5/0x270 [btrfs]
<4>[469120.919295] [<ffffffffa0148810>] btrfs_end_transaction+0x10/0x20 [btrfs]
<4>[469120.919308] [<ffffffffa014ed14>] btrfs_evict_inode+0x254/0x300 [btrfs]
<4>[469120.919312] [<ffffffff811ab34a>] evict+0x9a/0x190
<4>[469120.919315] [<ffffffff811ab54c>] iput+0x10c/0x200
<4>[469120.919318] [<ffffffff811a1347>] do_unlinkat+0x167/0x1d0
<4>[469120.919322] [<ffffffff811cef5e>] ? fsnotify_find_inode_mark+0x3e/0x50
<4>[469120.919326] [<ffffffff8190eac7>] ? sysret_check+0x1b/0x56
<4>[469120.919330] [<ffffffff810d9aa5>] ? trace_hardirqs_on_caller+0x105/0x190
<4>[469120.919334] [<ffffffff8142628e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
<4>[469120.919337] [<ffffffff811a152d>] sys_unlinkat+0x1d/0x40
<4>[469120.919340] [<ffffffff8190eaa2>] system_call_fastpath+0x16/0x1b
<4>[469120.919342] ---[ end trace 1dfd6883330a5208 ]---
<3>[469120.919345] btrfs unable to find ref byte nr 1072283648 parent 0 root 5 owner 14760652 offset 819200
-Jan
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