From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oded Gabbay Subject: Re: [f2fs-dev] Kernel BUG when writing to f2fs drive, PowerPC, SD card, USB3 Date: Tue, 18 Jun 2013 12:44:06 +0300 Message-ID: <51C02BE6.4070007@advaoptical.com> References: <51BDA6BE.1040800@advaoptical.com> <1371471068.10480.8.camel@kjgkr> <51BF1B84.8080802@advaoptical.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============8254355619640299222==" Return-path: Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1UosSu-0008NM-Sc for linux-f2fs-devel@lists.sourceforge.net; Tue, 18 Jun 2013 09:44:40 +0000 Received: from mail.advaoptical.com ([91.217.199.15]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1UosSs-00089K-2O for linux-f2fs-devel@lists.sourceforge.net; Tue, 18 Jun 2013 09:44:40 +0000 In-Reply-To: <51BF1B84.8080802@advaoptical.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: jaegeuk.kim@samsung.com Cc: linux-f2fs-devel@lists.sourceforge.net --===============8254355619640299222== Content-Type: multipart/alternative; boundary="------------090606030704080808030300" --------------090606030704080808030300 Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by muc-vsrv-fsmail.advaoptical.com id r5I9iUfY032666 Hi, I would like to share additional information I have from pr_err I put=20 into the update_sit_entry function. The following is the printout from the terminal. This is only the end of=20 the printout. The start was with "segoff =3D 3584" and it went=20 sequentially up until 9215, where then it jumped to 99329 and after that=20 99328 - which is the entry that caused the crash. Each time I repeated the experiment I got exactly the same results. I put the pr_err after the line: "offset =3D GET_SEGOFF_FROM_SEG0(sbi,=20 blkaddr) & (sbi->blocks_per_seg - 1);" where segoff =3D GET_SEGOFF_FROM_SEG0(sbi, blkaddr) Hope this helps. REMOVE_ME update_sit_entry(202): offset =3D 0, segoff =3D 3584,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 1, segoff =3D 3585,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 2, segoff =3D 3586,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 3, segoff =3D 3587,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 4, segoff =3D 3588,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 5, segoff =3D 3589,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 6, segoff =3D 3590,=20 sbi->blocks_per_seg =3D 512 ::: REMOVE_ME update_sit_entry(202): offset =3D 502, segoff =3D 9206,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 503, segoff =3D 9207,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 504, segoff =3D 9208,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 505, segoff =3D 9209,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 506, segoff =3D 9210,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 507, segoff =3D 9211,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 508, segoff =3D 9212,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 509, segoff =3D 9213,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 510, segoff =3D 9214,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 511, segoff =3D 9215,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 1, segoff =3D 99329,=20 sbi->blocks_per_seg =3D 512 REMOVE_ME update_sit_entry(202): offset =3D 0, segoff =3D 99328,=20 sbi->blocks_per_seg =3D 512 ------------[ cut here ]------------ kernel BUG at=20 /home/ogabbay/views/r5.xcj/software/os-software/powerpc/usr/src/linux-3.9= .6-adva/fs/f2fs/segment.c:217! Oops: Exception in kernel mode, sig: 5 [#1] PREEMPT SMP NR_CPUS=3D2 P2020 FSP150 Modules linked in: mdio(O) hardware_version(PO) clipresent(PO)=20 monotonic(O) restartcause(PO) panic_buffer(O) NIP: c026c038 LR: c026bf0c CTR: 00000000 REGS: c5665a60 TRAP: 0700 Tainted: P O=20 (3.9.6-dev_ogabbay-109564*) MSR: 00029000 CR: 24f82c48 XER: 20000000 TASK =3D ef943e80[1774] 'flush-7:0' THREAD: c5664000 CPU: 1 GPR00: 00000000 c5665b10 ef943e80 000000a6 00021000 00000000 f1e26054=20 725f7365 GPR08: 00000000 c5a13e40 00000040 00000040 00000067 00000000 c5665c64=20 00000000 GPR16: c1419240 00080000 00000000 00000000 000000bb ef8ce100 00000000=20 ef8ce134 GPR24: ffffffff ffffff99 000000bb ef8ce100 00000080 f1e57760 ffffffff=20 c561e800 NIP [c026c038] update_sit_entry+0x234/0x23c LR [c026bf0c] update_sit_entry+0x108/0x23c Call Trace: [c5665b10] [c026bed4] update_sit_entry+0xd0/0x23c (unreliable) [c5665b40] [c026d1e8] do_write_page+0x198/0x660 [c5665b80] [c026d840] write_data_page+0xa4/0xb8 [c5665bc0] [c0265118] do_write_data_page+0x1e8/0x20c [c5665c20] [c02653dc] f2fs_write_data_page+0x2a0/0x2c0 [c5665c40] [c0263ad8] __f2fs_writepage+0x24/0x80 [c5665c50] [c00b05dc] write_cache_pages+0x1d0/0x35c [c5665d00] [c0263cf4] f2fs_write_data_pages+0xf4/0xfc [c5665d30] [c00b1d3c] do_writepages+0x30/0x64 [c5665d40] [c0103fbc] __writeback_single_inode+0x34/0x10c [c5665d60] [c0104ef8] writeback_sb_inodes+0x204/0x370 [c5665dd0] [c01050f4] __writeback_inodes_wb+0x90/0xd4 [c5665e00] [c01054cc] wb_writeback+0x204/0x20c [c5665e50] [c0105844] wb_do_writeback+0x144/0x20c [c5665eb0] [c0105980] bdi_writeback_thread+0x74/0x144 [c5665ee0] [c0059dc4] kthread+0xa8/0xac [c5665f40] [c000f014] ret_from_kernel_thread+0x64/0x6c --- Exception: 0 at (null) LR =3D (null) Instruction dump: 4bffff80 813d0004 5780e8fe 7f9ce0f8 39400001 579c077e 7d6900ae 7d5ce030 7d6ae078 7d68e039 7d4901ae 4082ff44 <0fe00000> 0fe00000 9421ffe0 7c0802a6 ---[ end trace 707fc0870875373e ]--- Oded On 06/17/2013 05:21 PM, Oded Gabbay wrote: > Hi, > > I also suspect the endian conversion issue. > Attached is a gzip-ed file, which represent an image of a freshly=20 > formatted disk in f2fs in powerpc machine. I preferred to do it this=20 > way so I could have a small file to send you. > I did the following to create it: > > [cj:~] # dd if=3D/dev/zero of=3D/tmp/test_file bs=3D4096 count=3D102400 > 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 =3D label > Info: sector size =3D 512 > Info: total sectors =3D 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 (=EC=9D=BC), 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=3D6,uhelper=3D= udisks2,background_gc_off /dev/sda /mnt/sd1" >>> Then, I started a small user-space test application which opens a fil= e >>> 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=3D2 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 CR: 24a52588 XER: 20000000 >>> TASK =3D 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 >>> >>> --=20 >>> 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 >>> =20 >>> www.advaoptical.com >>> Let's ADVANCE >>> =20 >>> ADVA Optical Networking SE is a European stock corporation (\"Societa= s >>> Europaea\") with registered offices at Maerzenquelle 1-3, D-98617 >>> Meiningen, Germany * CEO: Brian L. Protiva, Chief Officers: Dr. >>> Christoph Glingener, Christian Unterberger, Jaswir Singh * Chairman o= f >>> the Supervisory Board: Anthony Maher * AG Jena HRB 508155 * VAT No. D= E >>> 175 446 349 >>> >>> ---------------------------------------------------------------------= --------- >>> This SF.net email is sponsored by Windows: >>> >>> Build for Windows Store. >>> >>> http://p.sf.net/sfu/windows-dev2dev >>> _______________________________________________ Linux-f2fs-devel mail= ing listLinux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge= .net/lists/listinfo/linux-f2fs-devel > --------------090606030704080808030300 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by muc-vsrv-fsmail.advaoptical.com id r5I9iUfY032666 Hi,

I would like to share additional information I have from pr_err I put into the update_sit_entry function.

The following is the printout from the terminal. This is only the end of the printout. The start was with "segoff =3D 3584" and it went sequentially up until 9215, where then it jumped to 99329 and after that 99328 - which is the entry that caused the crash.
Each time I repeated the experiment I got exactly the same results.
I put the pr_err after the line: "offset =3D GET_SEGOFF_FROM_SEG0(sbi= , blkaddr) & (sbi->blocks_per_seg - 1);"
where segoff =3D GET_SEGOFF_FROM_SEG0(sbi, blkaddr)

Hope this helps.

REMOVE_ME update_sit_entry(202): offset =3D 0, segoff =3D 3584, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 1, segoff =3D 3585, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 2, segoff =3D 3586, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 3, segoff =3D 3587, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 4, segoff =3D 3588, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 5, segoff =3D 3589, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 6, segoff =3D 3590, sbi->blocks_per_seg =3D 512
:::
REMOVE_ME update_sit_entry(202): offset =3D 502, segoff =3D 9206, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 503, segoff =3D 9207, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 504, segoff =3D 9208, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 505, segoff =3D 9209, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 506, segoff =3D 9210, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 507, segoff =3D 9211, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 508, segoff =3D 9212, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 509, segoff =3D 9213, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 510, segoff =3D 9214, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 511, segoff =3D 9215, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 1, segoff =3D 99329, sbi->blocks_per_seg =3D 512
REMOVE_ME update_sit_entry(202): offset =3D 0, segoff =3D 99328, sbi->blocks_per_seg =3D 512

------------[ cut here ]------------
kernel BUG at /home/ogabbay/views/r5.xcj/software/os-software/powerpc/usr/src/linux-3.9= .6-adva/fs/f2fs/segment.c:217!
Oops: Exception in kernel mode, sig: 5 [#1]
PREEMPT SMP NR_CPUS=3D2 P2020 FSP150
Modules linked in: mdio(O) hardware_version(PO) clipresent(PO) monotonic(O) restartcause(PO) panic_buffer(O)
NIP: c026c038 LR: c026bf0c CTR: 00000000
REGS: c5665a60 TRAP: 0700=C2=A0=C2=A0 Tainted: P=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 O=C2=A0 (3.9.6-dev_ogabbay-109564*)
MSR: 00029000 <CE,EE,ME>=C2=A0 CR: 24f82c48=C2=A0 XER: 20000000=
TASK =3D ef943e80[1774] 'flush-7:0' THREAD: c5664000 CPU: 1
GPR00: 00000000 c5665b10 ef943e80 000000a6 00021000 00000000 f1e26054 725f7365
GPR08: 00000000 c5a13e40 00000040 00000040 00000067 00000000 c5665c64 00000000
GPR16: c1419240 00080000 00000000 00000000 000000bb ef8ce100 00000000 ef8ce134
GPR24: ffffffff ffffff99 000000bb ef8ce100 00000080 f1e57760 ffffffff c561e800
NIP [c026c038] update_sit_entry+0x234/0x23c
LR [c026bf0c] update_sit_entry+0x108/0x23c
Call Trace:
[c5665b10] [c026bed4] update_sit_entry+0xd0/0x23c (unreliable)
[c5665b40] [c026d1e8] do_write_page+0x198/0x660
[c5665b80] [c026d840] write_data_page+0xa4/0xb8
[c5665bc0] [c0265118] do_write_data_page+0x1e8/0x20c
[c5665c20] [c02653dc] f2fs_write_data_page+0x2a0/0x2c0
[c5665c40] [c0263ad8] __f2fs_writepage+0x24/0x80
[c5665c50] [c00b05dc] write_cache_pages+0x1d0/0x35c
[c5665d00] [c0263cf4] f2fs_write_data_pages+0xf4/0xfc
[c5665d30] [c00b1d3c] do_writepages+0x30/0x64
[c5665d40] [c0103fbc] __writeback_single_inode+0x34/0x10c
[c5665d60] [c0104ef8] writeback_sb_inodes+0x204/0x370
[c5665dd0] [c01050f4] __writeback_inodes_wb+0x90/0xd4
[c5665e00] [c01054cc] wb_writeback+0x204/0x20c
[c5665e50] [c0105844] wb_do_writeback+0x144/0x20c
[c5665eb0] [c0105980] bdi_writeback_thread+0x74/0x144
[c5665ee0] [c0059dc4] kthread+0xa8/0xac
[c5665f40] [c000f014] ret_from_kernel_thread+0x64/0x6c
--- Exception: 0 at=C2=A0=C2=A0 (null)
=C2=A0=C2=A0=C2=A0 LR =3D=C2=A0=C2=A0 (null)
Instruction dump:
4bffff80 813d0004 5780e8fe 7f9ce0f8 39400001 579c077e 7d6900ae 7d5ce030
7d6ae078 7d68e039 7d4901ae 4082ff44 <0fe00000> 0fe00000 9421ffe0 7c0802a6
---[ end trace 707fc0870875373e ]---

Oded
On 06/17/2013 05:21 PM, Oded Gabbay wrote:
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=3D/dev/zero of=3D/tmp/test_file bs=3D4096 count=3D102400
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

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 F2FS-tools: mkfs.f2fs = Ver: 1.1.0 (2013-06-13)

Info: Label =3D label
Info: sector size =3D 512
Info: total sectors =3D 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.kerne=
l.org/cgit/linux/kernel/git/jaegeuk/f2fs.git

Thanks,

2013-06-16 (=EC=9D=BC), 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=3D6,uhelper=3Dudi=
sks2,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.=20
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) an=
d 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:=20
        if (!f2fs_clear_bit(offset, se->cur_valid_map))
            BUG();

Additional information I can give is=20

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=3D2 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 =3D efb444c0[1755] 'flush-8:0' THREAD: ee760000 CPU: 1
GPR00: 00000000 ee761b10 efb444c0 0000004c 00000000 00000000 01dc4900
eb0fa700=20
GPR08: 00000000 eb24cb00 00000040 00000040 00000038 00000000 ee761c64
00000000=20
GPR16: c0aeea80 00080000 00000000 00000000 0000ed31 eb0fa700 00000000
eb0fa734=20
GPR24: eb0fa700 00000080 f2030620 ffffffff ffffffc8 0000ed31 ffffffff
c55a1000=20
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=20
7d6ac878 7d68c839 7d4901ae 4082fef0 <0fe00000> 0fe00000 9421ffe0
7c0802a6=20

--=20
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
=20
www.advaoptical.com
Let's ADVANCE
=20
ADVA Optical Networking SE is a European stock corporation (\"Societas
Europaea\") with registered offices at Maerzenquelle 1-3, D-98617
Meiningen, Germany * CEO: Brian L. Protiva, Chief Officers: Dr.
Christoph Glingener, Christian Unterberger, Jaswir Singh * Chairman of
the Supervisory Board: Anthony Maher * AG Jena HRB 508155 * VAT No. DE
175 446 349

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