On Sun, Jan 31, 2010 at 6:09 PM, Troy Ablan <tablan@xxxxxxxxx> wrote:
> Yan, Zheng wrote:
>> Please run btrfsck and mount the fs with the new patches attached
>> below. Thank you
>>
>> Yan, Zheng,
>>
>>
>>
> During my two runs of btrfsck, the machine froze in an odd way before it
> completed where the VTs were still accessible but wouldn't accept
> keystrokes. I at first suspected it ran out of memory+swap. I gave it
> more swap through temp swapfiles the second time around. During most of
> the fsck run, the process held onto 2.7 GB of RAM. Toward the end, it
> climbed all the way to 3.8 GB, and then the entire machine froze in this
> odd way again.
>
> This was the `vmstat 1` that was running as it froze.
>
> procs -----------memory---------- ---swap-- -----io---- -system--
> ----cpu----
> r b swpd free buff cache si so bi bo in cs us sy
> id wa
> 0 2 8296 30128 4240 3552 0 0 2800 0 1833 3366 0 1
> 75 24
> 0 2 8296 29880 5204 3204 0 0 4028 0 2447 4554 0 1
> 74 24
> 0 2 8296 30508 4400 3288 0 0 1680 20 1855 2422 0 1
> 75 24
> 0 2 8296 30136 3720 3108 0 0 2464 0 2009 2672 0 1
> 73 25
> 0 2 8296 29392 4396 3012 0 0 5996 0 2346 4089 0 2
> 71 27
> 0 2 8296 29144 4076 2592 0 0 3952 0 4430 2910 0 1
> 77 21
> 0 2 8296 29764 2416 2868 0 0 2168 12 1750 2488 0 1
> 70 28
> 0 3 28900 25796 1804 1860 0 20604 3428 20660 1906 2766 0 2
> 75 23
> 1 3 109760 25796 1396 1992 0 80852 288 80852 7665 442 0 2
> 60 37
> 0 4 113096 25672 1396 1992 0 3332 0 3332 105 43 0 0
> 74 26
>
> And the `top`
>
> top - 02:50:28 up 3:48, 8 users, load average: 2.52, 2.01, 1.72
> Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie
> Cpu(s): 0.1%us, 0.6%sy, 0.0%ni, 59.5%id, 39.7%wa, 0.0%hi, 0.0%si,
> 0.0%st
> Mem: 4050160k total, 4024488k used, 25672k free, 1268k buffers
> Swap: 20978072k total, 119136k used, 20858936k free, 2072k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
> COMMAND
> 5882 root 20 0 3840m 3.6g 220 D 2 94.2 8:26.44
> btrfsck
>
>
> This is as much from fsck as was available during both runs
>
> -[~:#]- ./btrfsck /dev/mapper/btra
> root 256 inode 356018 errors 2000
> root 256 inode 356022 errors 2000
> root 256 inode 356023 errors 2000
> root 256 inode 356025 errors 2000
> root 256 inode 356027 errors 2000
> root 256 inode 356033 errors 2000
> root 256 inode 356034 errors 2000
> root 256 inode 356035 errors 2000
> root 256 inode 356036 errors 2000
> root 256 inode 356037 errors 2000
> root 256 inode 356038 errors 2000
> root 256 inode 356039 errors 2000
> root 256 inode 356040 errors 2000
> root 256 inode 356044 errors 2000
> root 256 inode 356045 errors 2000
> root 256 inode 356046 errors 2000
> root 256 inode 356047 errors 2000
> root 256 inode 356049 errors 2000
> root 256 inode 356050 errors 2000
> root 256 inode 356051 errors 2000
> root 256 inode 356052 errors 2000
> root 256 inode 356053 errors 2000
> root 256 inode 356054 errors 2000
> root 256 inode 356055 errors 2000
> root 256 inode 356056 errors 2000
> root 256 inode 356058 errors 2000
> root 256 inode 356063 errors 2000
> root 256 inode 640297 errors 2000
> root 256 inode 640301 errors 2000
> root 256 inode 640302 errors 2000
> root 256 inode 640304 errors 2000
> root 256 inode 640306 errors 2000
> root 256 inode 640312 errors 2000
> root 256 inode 640313 errors 2000
> root 256 inode 640314 errors 2000
> root 256 inode 640315 errors 2000
> root 256 inode 640316 errors 2000
> root 256 inode 640317 errors 2000
> root 256 inode 640318 errors 2000
> root 256 inode 640319 errors 2000
> root 256 inode 640323 errors 2000
> root 256 inode 640324 errors 2000
> root 256 inode 640325 errors 2000
> root 256 inode 640326 errors 2000
> root 256 inode 640328 errors 2000
> root 256 inode 640329 errors 2000
> root 256 inode 640330 errors 2000
> root 256 inode 640331 errors 2000
> root 256 inode 640332 errors 2000
> root 256 inode 640333 errors 2000
> root 256 inode 640334 errors 2000
> root 256 inode 640335 errors 2000
> root 256 inode 640337 errors 2000
> root 256 inode 640342 errors 2000
> root 256 inode 831519 errors 2000
> root 257 inode 272056 errors 2000
> root 257 inode 272060 errors 2000
> root 257 inode 272061 errors 2000
> root 257 inode 272063 errors 2000
> root 257 inode 272065 errors 2000
> root 257 inode 272071 errors 2000
> root 257 inode 272072 errors 2000
> root 257 inode 272073 errors 2000
> root 257 inode 272074 errors 2000
> root 257 inode 272075 errors 2000
> root 257 inode 272076 errors 2000
> root 257 inode 272077 errors 2000
> root 257 inode 272078 errors 2000
> root 257 inode 272082 errors 2000
> root 257 inode 272083 errors 2000
> root 257 inode 272084 errors 2000
> root 257 inode 272085 errors 2000
> root 257 inode 272087 errors 2000
> root 257 inode 272088 errors 2000
> root 257 inode 272089 errors 2000
> root 257 inode 272090 errors 2000
> root 257 inode 272091 errors 2000
> root 257 inode 272092 errors 2000
> root 257 inode 272093 errors 2000
> root 257 inode 272094 errors 2000
> root 257 inode 272096 errors 2000
> root 257 inode 272101 errors 2000
> root 257 inode 799036 errors 400
> root 259 inode 47249 errors 2000
> root 259 inode 47253 errors 2000
> root 259 inode 47254 errors 2000
> root 259 inode 47256 errors 2000
> root 259 inode 47258 errors 2000
> root 259 inode 47264 errors 2000
> root 259 inode 47265 errors 2000
> root 259 inode 47266 errors 2000
> root 259 inode 47267 errors 2000
> root 259 inode 47268 errors 2000
> root 259 inode 47269 errors 2000
> root 259 inode 47270 errors 2000
> root 259 inode 47271 errors 2000
> root 259 inode 47275 errors 2000
> root 259 inode 47276 errors 2000
> root 259 inode 47277 errors 2000
> root 259 inode 47278 errors 2000
> root 259 inode 47280 errors 2000
> root 259 inode 47281 errors 2000
> root 259 inode 47282 errors 2000
> root 259 inode 47283 errors 2000
> root 259 inode 47284 errors 2000
> root 259 inode 47285 errors 2000
> root 259 inode 47286 errors 2000
> root 259 inode 47287 errors 2000
> root 259 inode 47289 errors 2000
> root 259 inode 47294 errors 2000
> root 264 inode 241037 errors 2000
> root 264 inode 242664 errors 2000
> root 264 inode 242665 errors 2000
> root 264 inode 243283 errors 2000
> root 264 inode 250001 errors 2000
> root 264 inode 250440 errors 2000
> root 264 inode 250891 errors 2000
> root 268 inode 78830 errors 2000
> root 268 inode 78834 errors 2000
> root 268 inode 78835 errors 2000
> root 268 inode 78837 errors 2000
> root 268 inode 78839 errors 2000
> root 268 inode 78845 errors 2000
> root 268 inode 78846 errors 2000
> root 268 inode 78847 errors 2000
> root 268 inode 78848 errors 2000
> root 268 inode 78849 errors 2000
> root 268 inode 78850 errors 2000
> root 268 inode 78851 errors 2000
> root 268 inode 78852 errors 2000
> root 268 inode 78856 errors 2000
> root 268 inode 78857 errors 2000
> root 268 inode 78858 errors 2000
> root 268 inode 78859 errors 2000
> root 268 inode 78861 errors 2000
> root 268 inode 78862 errors 2000
> root 268 inode 78863 errors 2000
> root 268 inode 78864 errors 2000
> root 268 inode 78865 errors 2000
> root 268 inode 78866 errors 2000
> root 268 inode 78867 errors 2000
> root 268 inode 78868 errors 2000
> root 268 inode 78870 errors 2000
> root 268 inode 78875 errors 2000
>
>
> And for the mount, done after rebooting
>
> [ 198.062442] device label bk0 devid 1 transid 111136 /dev/mapper/btra
> [ 198.157820] btrfs: use compression
> [ 246.549684] root 18446744073709551608 536
> [ 246.549688] node 9197760471040 refs 0 flags 0 owner 536 reloc 1 level
> 0 nritems 0
> [ 246.549695] ------------[ cut here ]------------
> [ 246.549780] kernel BUG at fs/btrfs/extent-tree.c:5385!
> [ 246.549864] invalid opcode: 0000 [#1] SMP
> [ 246.550016] last sysfs file:
> /sys/devices/virtual/block/md1/md/metadata_version
> [ 246.550145] CPU 5
> [ 246.550260] Pid: 5993, comm: btrfs-relocate- Tainted: G W
> 2.6.33-rc6 #1 P55M-GD45 (MS-7588) /MS-7588
> [ 246.550392] RIP: 0010:[<ffffffff8129e686>] [<ffffffff8129e686>]
> walk_up_proc+0x456/0x4c0
> [ 246.550560] RSP: 0018:ffff880138a93c70 EFLAGS: 00010282
> [ 246.550644] RAX: 0000000000000058 RBX: ffff88013c12f9c0 RCX:
> 000000000003ffff
> [ 246.550732] RDX: ffff880028340000 RSI: 0000000000000082 RDI:
> 0000000000000000
> [ 246.550819] RBP: ffff880138a93cf0 R08: 0000000000000000 R09:
> ffffffff816ac59f
> [ 246.551695] R10: 0000000000000000 R11: 0000000000000004 R12:
> 0000000000000000
> [ 246.551783] R13: ffff880138a92000 R14: ffff8801396769a0 R15:
> ffff88013e69c000
> [ 246.551870] FS: 0000000000000000(0000) GS:ffff880028340000(0000)
> knlGS:0000000000000000
> [ 246.552000] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 246.552085] CR2: 00007f3dde7b9ea0 CR3: 00000000018d3000 CR4:
> 00000000000006e0
> [ 246.552172] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 246.552259] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [ 246.552347] Process btrfs-relocate- (pid: 5993, threadinfo
> ffff880138a92000, task ffff88013c5d40c0)
> [ 246.552478] Stack:
> [ 246.552556] ffff880100000000 ffff880100000000 ffff880138a93d30
> ffff880000000000
> [ 246.552748] <0> 6db6db6db6db6db7 0000160000000000 0000000000000008
> 0000000000000206
> [ 246.553050] <0> ffff880138a93d20 ffff88013967c8e0 0000000000000000
> 0000000000000000
> [ 246.553531] Call Trace:
> [ 246.553613] [<ffffffff8129e82f>] walk_up_tree+0x13f/0x1c0
> [ 246.553699] [<ffffffff8129fa98>] btrfs_drop_snapshot+0x218/0x5e0
> [ 246.553786] [<ffffffff812a9eb0>] ? __btrfs_end_transaction+0x100/0x170
> [ 246.553875] [<ffffffff812e7e5d>] merge_func+0x7d/0xc0
> [ 246.553961] [<ffffffff812d268a>] worker_loop+0x17a/0x540
> [ 246.554046] [<ffffffff812d2510>] ? worker_loop+0x0/0x540
> [ 246.554131] [<ffffffff812d2510>] ? worker_loop+0x0/0x540
> [ 246.554217] [<ffffffff81095936>] kthread+0x96/0xa0
> [ 246.554303] [<ffffffff81034bd4>] kernel_thread_helper+0x4/0x10
> [ 246.554408] [<ffffffff816ac969>] ? restore_args+0x0/0x30
> [ 246.554493] [<ffffffff810958a0>] ? kthread+0x0/0xa0
> [ 246.554578] [<ffffffff81034bd0>] ? kernel_thread_helper+0x0/0x10
> [ 246.554663] Code: 0f 95 c1 89 7c 24 08 48 8b 0c c3 4a 8b 14 e3 40 0f
> b6 f6 41 83 e1 01 89 34 24 48 c7 c7 98 6a 81 81 49 8b 36 31 c0 e8 26 af
> 40 00 <0f> 0b eb fe 66 0f 1f 44 00 00 4c 89 f7 e8 48 70 03 00 4c 89 f7
> [ 246.557353] RIP [<ffffffff8129e686>] walk_up_proc+0x456/0x4c0
> [ 246.557474] RSP <ffff880138a93c70>
> [ 246.557601] ---[ end trace 18f62a4fb26ae09e ]---
>
Please try the patch attached below. It should solve the bug during mounting
that fs. But I don't know why there are so many link count errors in that fs.
How old is that fs? what was that fs used for?
Thank you very much.
Yan, Zheng
---
diff -urp 1/fs/btrfs/extent-tree.c 2/fs/btrfs/extent-tree.c
--- 1/fs/btrfs/extent-tree.c 2010-01-22 12:16:34.203525744 +0800
+++ 2/fs/btrfs/extent-tree.c 2010-01-31 20:09:08.509200892 +0800
@@ -5402,14 +5402,14 @@ static noinline int walk_down_tree(struc
int ret;
while (level >= 0) {
- if (path->slots[level] >=
- btrfs_header_nritems(path->nodes[level]))
- break;
-
ret = walk_down_proc(trans, root, path, wc, lookup_info);
if (ret > 0)
break;
+ if (path->slots[level] >=
+ btrfs_header_nritems(path->nodes[level]))
+ break;
+
if (level == 0)
break;
---
--
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