[f2fs-dev] [Virus Scan Error!] Re: Kernel BUG when writing to f2fs drive, PowerPC, SD card, USB3

[Oded Gabbay <ogabbay@advaoptical.com>]

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Hi,

I also suspect the endian conversion issue.
Attached is a gzip-ed file, which represent an image of a freshly 
formatted disk in f2fs in powerpc machine. I preferred to do it this way 
so I could have a small file to send you.
I did the following to create it:

[cj:~] # dd if=/dev/zero of=/tmp/test_file bs=4096 count=102400
102400+0 records in
102400+0 records out
419430400 bytes (419 MB) copied, 1.05112 s, 399 MB/s
[cj:~] # losetup /dev/loop0 /tmp/test_file
[cj:~] # mkfs.f2fs -l label /dev/loop0

         F2FS-tools: mkfs.f2fs Ver: 1.1.0 (2013-06-13)

Info: Label = label
Info: sector size = 512
Info: total sectors = 819200 (in 512bytes)
Info: zone aligned segment0 blkaddr: 512
Info: format successful
[cj:~] # losetup -d /dev/loop0
[cj:/tmp] # gzip test_file

I then run my test application and got the same kernel BUG message.

Oded

On 06/17/2013 03:11 PM, Jaegeuk Kim wrote:
> Hi,
>
> Thank you for the report. :)
>
> Can you send me the disk image right after formatting f2fs?
> As your previous patch, I strongly suspect the endian conversion bug.
>
> Otherwise, I recommend you to test with the latest tree from:
> http://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs.git
>
> Thanks,
>
> 2013-06-16 (일), 14:51 +0300, Oded Gabbay:
>> Hi,
>>
>> I'm working on a custom board with a PowerPC processor (Freescale
>> P2020).
>> On the board there is an SD card, which is connected to a USB3 chip
>> (from TI), which is connected to the PCI-e controller of the CPU.
>> I'm running with Linux kernel 3.9.6, with our custom rootFS.
>>
>> I formatted an SD card using the mkfs.f2fs utility (after fixing some
>> Big-endian issues - sent a patch a few days ago).
>> I then mounted the SD card, using "mount -o
>> noatime,nodiratime,rw,nosuid,nodev,relatime,active_logs=6,uhelper=udisks2,background_gc_off /dev/sda /mnt/sd1"
>> Then, I started a small user-space test application which opens a file
>> on the mount folder and starts to do "fwrite" into the file.
>> After 2-3 seconds, the kernel gives me a BUG and the system restarts.
>> When the system is up and I try to re-mount the SD card, I get the
>> following error message:
>>
>> F2FS-fs (sda): Failed to get valid F2FS checkpoint
>> mount: you must specify the filesystem type
>>
>> Only way is to re-format the card using mkfs.f2fs
>>
>> I took the f2fs patch that Jaegeuk Kim sent to Linus for 3.10 (here -
>> https://lkml.org/lkml/2013/5/8/122) and applied it cleanly to 3.9.6
>> I repeated the procedure but got the same result.
>>
>> The BUG is from this line, from segment.c:
>>          if (!f2fs_clear_bit(offset, se->cur_valid_map))
>>              BUG();
>>
>> Additional information I can give is
>>
>> 1. I tried using F2FS in ArchLinux, kernel 3.9.5, on an x86 machine,
>> with the same SD card and the same USB3-to-PCIe chip and it worked
>> flawlessly there.
>> 2. I can work with other FS on the SD card on our custom board, such
>> as Ext3, Ext4 and vfat, so this is not a H/W issue.
>>
>> Could you please try to help me pinpoint/debug the problem ?
>>
>> Here is the complete kernel BUG print:
>>
>> kernel BUG at .../linux-3.9.6-adva/fs/f2fs/segment.c:214!
>> Oops: Exception in kernel mode, sig: 5 [#1]
>> PREEMPT SMP NR_CPUS=2 P2020 FSP150
>> Modules linked in: mdio(O) hardware_version(PO) clipresent(PO)
>> monotonic(O) restartcause(PO) panic_buffer(O)
>> NIP: c026a7e0 LR: c026a660 CTR: 00000000
>> REGS: ee761a60 TRAP: 0700   Tainted: P           O
>> (3.9.6-dev_ogabbay-109482*)
>> MSR: 00029000 <CE,EE,ME>  CR: 24a52588  XER: 20000000
>> TASK = efb444c0[1755] 'flush-8:0' THREAD: ee760000 CPU: 1
>> GPR00: 00000000 ee761b10 efb444c0 0000004c 00000000 00000000 01dc4900
>> eb0fa700
>> GPR08: 00000000 eb24cb00 00000040 00000040 00000038 00000000 ee761c64
>> 00000000
>> GPR16: c0aeea80 00080000 00000000 00000000 0000ed31 eb0fa700 00000000
>> eb0fa734
>> GPR24: eb0fa700 00000080 f2030620 ffffffff ffffffc8 0000ed31 ffffffff
>> c55a1000
>> NIP [c026a7e0] update_sit_entry+0x240/0x248
>> LR [c026a660] update_sit_entry+0xc0/0x248
>> Call Trace:
>> [ee761b10] [c55a1000] 0xc55a1000 (unreliable)
>> [ee761b40] [c026d1f4] do_write_page+0x198/0x660
>> [ee761b80] [c026d84c] write_data_page+0xa4/0xb8
>> [ee761bc0] [c0265118] do_write_data_page+0x1e8/0x20c
>> [ee761c20] [c02653dc] f2fs_write_data_page+0x2a0/0x2c0
>> [ee761c40] [c0263ad8] __f2fs_writepage+0x24/0x80
>> [ee761c50] [c00b05dc] write_cache_pages+0x1d0/0x35c
>> [ee761d00] [c0263cf4] f2fs_write_data_pages+0xf4/0xfc
>> [ee761d30] [c00b1d3c] do_writepages+0x30/0x64
>> [ee761d40] [c0103fbc] __writeback_single_inode+0x34/0x10c
>> [ee761d60] [c0104ef8] writeback_sb_inodes+0x204/0x370
>> [ee761dd0] [c01050f4] __writeback_inodes_wb+0x90/0xd4
>> [ee761e00] [c01054cc] wb_writeback+0x204/0x20c
>> [ee761e50] [c0105844] wb_do_writeback+0x144/0x20c
>> [ee761eb0] [c0105980] bdi_writeback_thread+0x74/0x144
>> [ee761ee0] [c0059dc4] kthread+0xa8/0xac
>> [ee761f40] [c000f014] ret_from_kernel_thread+0x64/0x6c
>> Instruction dump:
>> 4bffff2c 813a0004 5720e8fe 7f39c8f8 39400001 5739077e 7d6900ae
>> 7d59c830
>> 7d6ac878 7d68c839 7d4901ae 4082fef0 <0fe00000> 0fe00000 9421ffe0
>> 7c0802a6
>>
>> -- 
>> Best regards,
>> Oded Gabbay
>> Principal Engineer Advanced Packet Technologies
>> ADVA Optical Networking Israel Ltd.
>> P.O. Box 2552
>> 2 Hatidhar St.
>> Raanana 4366504, Israel
>> Tel: +(972)-9-7750130
>> Fax: +(972)-9-7462092
>> Mobile: +(972)-54-6543998
>> E-mail: ogabbay@advaoptical.com
>>   
>> www.advaoptical.com
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