read_pnode: error -22 reading pnode at XX:YYYYY
Rick Johnson
rick22 at wi.rr.com
Tue May 24 15:37:16 EDT 2011
Artem Bityutskiy wrote:
>
> 1. Your kernel version is 2.6.36, do you use up-to-date UBI/UBIFS from
> the ubifs-v2.6.36 back-port tree? See here:
> http://www.linux-mtd.infradead.org/doc/ubifs.html#L_source
We are not up to date. I'll look into getting us there. Thanks!
In the meantime, I have the debug info you were looking for.
> 2. Could you please make sure you have UBIFS debugging enabled - just
> debugging support, no additional messages or checks. Then post UBIFS
> messages which it prints when you mount it. It prints things like
> LPT model (c->big_lpt) which I want to know.
UBIFS DBG (pid 1): mount_ubifs: compiled on: May 13 2011 at 14:22:48
UBIFS DBG (pid 1): mount_ubifs: min. I/O unit size: 2048 bytes
UBIFS DBG (pid 1): mount_ubifs: LEB size: 129024 bytes (126 KiB)
UBIFS DBG (pid 1): mount_ubifs: data journal heads: 1
UBIFS DBG (pid 1): mount_ubifs: UUID:
2A1E7A10-8791-42F1-9BA3-F13692BF16E2
UBIFS DBG (pid 1): mount_ubifs: big_lpt 1
UBIFS DBG (pid 1): mount_ubifs: log LEBs: 5 (3 - 7)
UBIFS DBG (pid 1): mount_ubifs: LPT area LEBs: 13 (8 - 20)
UBIFS DBG (pid 1): mount_ubifs: orphan area LEBs: 1 (21 - 21)
UBIFS DBG (pid 1): mount_ubifs: main area LEBs: 8041 (22 - 8062)
UBIFS DBG (pid 1): mount_ubifs: index LEBs: 2
UBIFS DBG (pid 1): mount_ubifs: total index bytes: 165544 (161 KiB, 0 MiB)
UBIFS DBG (pid 1): mount_ubifs: key hash type: 0
UBIFS DBG (pid 1): mount_ubifs: tree fanout: 8
UBIFS DBG (pid 1): mount_ubifs: reserved GC LEB: 7709
UBIFS DBG (pid 1): mount_ubifs: first main LEB: 22
UBIFS DBG (pid 1): mount_ubifs: max. znode size 240
UBIFS DBG (pid 1): mount_ubifs: max. index node size 192
UBIFS DBG (pid 1): mount_ubifs: node sizes: data 48, inode 160,
dentry 56
UBIFS DBG (pid 1): mount_ubifs: node sizes: trun 56, sb 4096,
master 512
UBIFS DBG (pid 1): mount_ubifs: node sizes: ref 64, cmt. start
32, orph 32
UBIFS DBG (pid 1): mount_ubifs: max. node sizes: data 4144, inode
4256 dentry 312
UBIFS DBG (pid 1): mount_ubifs: dead watermark: 2048
UBIFS DBG (pid 1): mount_ubifs: dark watermark: 6144
UBIFS DBG (pid 1): mount_ubifs: LEB overhead: 560
UBIFS DBG (pid 1): mount_ubifs: max. dark space: 49403904 (48246
KiB, 47 MiB)
UBIFS DBG (pid 1): mount_ubifs: maximum bud bytes: 8388608 (8192 KiB,
8 MiB)
UBIFS DBG (pid 1): mount_ubifs: BG commit bud bytes: 6815744 (6656 KiB,
6 MiB)
UBIFS DBG (pid 1): mount_ubifs: current bud bytes 139264 (136 KiB, 0 MiB)
UBIFS DBG (pid 1): mount_ubifs: max. seq. number: 7823
UBIFS DBG (pid 1): mount_ubifs: commit number: 11
> 3. Please, enable LPT extra checks and run your tests and try to
> reproduce this issue. To enable LPT extra checks you need to do:
>
> $ sudo sh -c 'echo 32 > /sys/module/ubifs/parameters/debug_chks'
>
> This will make UBIFS to check lprops at each commit and we have a
> better chance to catch issues.
>
We were able to make it fail before limiting the checks to just the LPT
area. I'll try it again with your above change.
UBIFS error (pid 29): dbg_chk_pnode: pnode num -952997232 expected 1803
parent num 6196 iip 3
UBIFS error (pid 29): do_commit: commit failed, error -22
UBIFS warning (pid 29): ubifs_ro_mode: switched to read-only mode, error -22
Call Trace:
[c7a19ec0] [c00085b8] show_stack+0x7c/0x194 (unreliable)
[c7a19f00] [c00f2608] ubifs_ro_mode+0x6c/0x7c
[c7a19f10] [c01000bc] do_commit+0x5fc/0x620
[c7a19f90] [c0100468] ubifs_bg_thread+0xf4/0x154
[c7a19fb0] [c0037cec] kthread+0x80/0x84
[c7a19ff0] [c000ef84] kernel_thread+0x4c/0x68
> Thanks!
>
Thank you!
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