Ext3 is supported not well at 2.6.28 for external SD card removal

[hzpeterchen@gmail.com (Peter Chen)]

Marek Vasut wrote:
> Dne Po 19. ??jna 2009 07:38:35 Peter Chen napsal(a):
>> Dear all,
>>
>> I find the kernel 2.6.28 is supported ext3 for SD card not well.
>> The external SD card is formatted with ext3, and when removal from
>> sd slot, it prints below ext3_abort msg. Such message isn't occurred at
>> Linux 2.6.23 and 2.6.27.
>>
>> mmc1: card d555 removed
>> mmcblk2: error -110 sending read/write command
>> mmcblk2: error -110 requesting status
>> end_request: I/O error, dev mmcblk2, sector 1576855
>> Buffer I/O error on device mmcblk2p1, logical block 197099
>> lost page write due to I/O error on mmcblk2p1
>> mmcblk2: error -110 sending read/write command
>> mmcblk2: error -110 requesting status
>> end_request: I/O error, dev mmcblk2, sector 1576863
>> Buffer I/O error on device mmcblk2p1, logical block 197100
>> lost page write due to I/O error on mmcblk2p1
>> Aborting journal on device mmcblk2p1.
>> ------------[ cut here ]------------
>> WARNING: at
>> /home/nchen/work/L28EVB/Dev/sirfa5cb_l28_alpha/kernel/fs/buffer.c:1195
>> mark_buffer_dirty+0x9c/0xb8()
>> Modules linked in: sirfsoc_wdt sirfsoc_uspserial g_ether g_usbdrv
>> ehci_hcd usbcore snd_soc_cb_modac_ts snd_soc_modac snd_soc_sirfsoc_i2s
>>  snd_s oc_ts_stream_mode snd_soc_sirfsoc snd_soc_core snd_pcm snd_timer snd
>>  soundcore snd_page_alloc sirfsoc_bl sirfsoc_fb cfbcopyarea cfbimgblt cfbf
>>  illrect
>> [<c008a8d8>] (dump_stack+0x0/0x14) from [<c009edfc>]
>> (warn_on_slowpath+0x4c/0x68)
>> [<c009edb0>] (warn_on_slowpath+0x0/0x68) from [<c011c1b0>]
>> (mark_buffer_dirty+0x9c/0xb8)
>>   r6:c0ad1000 r5:c0340970 r4:c349b7f0
>> [<c011c114>] (mark_buffer_dirty+0x0/0xb8) from [<c015b84c>]
>> (journal_update_superblock+0xcc/0x14c)
>>   r5:c3a319c0 r4:c38da000
>> [<c015b780>] (journal_update_superblock+0x0/0x14c) from [<c015ba84>]
>> (__journal_abort_soft+0xc8/0xd8)
>>   r7:c38da000 r6:fffffffb r5:c3a319c0 r4:c38da000
>> [<c015b9bc>] (__journal_abort_soft+0x0/0xd8) from [<c015baa4>]
>> (journal_abort+0x10/0x14)
>>   r6:c3493860 r5:fffffffb r4:c349b748
>> [<c015ba94>] (journal_abort+0x0/0x14) from [<c0158324>]
>> (journal_commit_transaction+0xa64/0x14a0)
>> [<c01578c0>] (journal_commit_transaction+0x0/0x14a0) from [<c015c6d8>]
>> (kjournald+0xc4/0x29c)
>> [<c015c614>] (kjournald+0x0/0x29c) from [<c00b5818>] (kthread+0x54/0x80)
>> [<c00b57c4>] (kthread+0x0/0x80) from [<c00a1ec8>] (do_exit+0x0/0x818)
>>   r5:00000000 r4:00000000
>> ---[ end trace 494b15a74f793f7d ]---
>> mmcblk2: error -110 sending read/write command
>> mmcblk2: error -110 requesting status
>> end_request: I/O error, dev mmcblk2, sector 1576855
>> Buffer I/O error on device mmcblk2p1, logical block 197099
>> lost page write due to I/O error on mmcblk2p1
>> journal commit I/O error
>> ext3_abort called.
>> EXT3-fs error (device mmcblk2p1): ext3_put_super: Couldn't clean up the
>> journal
>> Remounting filesystem read-only
>>
>> Besides, I find when system goes to suspend, when we remove sd card
>> after the system has already suspended. Then, press wakeup button, the
>> system can't wakeup. It sounds happens
>> deadlock at __fsync_super, which call stack likes below:
>> mmc_remove_card-->device_del-->mmc_blk_remove-->del_gendisk
>>
>> Such action is ok at Linux 2.6.23 and 2.6.27. And sd card with vfat at
>> 2.6.28 is ok.
>>
>> Does anyone know what happening for ext3 at 2.6.28 ( or from 2.6.28)?
>> Any solutions for such issue?
> 
> You popped the card out without unmounting the filesystem I guess ?
We don't execute umount at 2.6.27/23 either, and it has little error:
[   32.541208] Buffer I/O error on device mmcblk1p1, logical block 0
[   32.544784] lost page write due to I/O error on mmcblk1p1

Besides, the remove card is ok after suspend at 2.6.27 and 2.6.23.

Usually, the remove card(ext3) without umount is forbiddon or not?
I know the ext3 default is journal filesystem, and the write-back
execution is delayed 5 seconds.

>> Thank you!
>>
> 

-- 
Best regards,
Peter Chen