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Subject2.6.0-test9+bk: very slow mount of a Canon FC-32M compactflash card
I have a strange 32Mb CF card. The card was causing this "slow mount" as
long as I can remember (I probably even reported it already, but not
sure). First (after boot) attempt to mount is usually normally fast,
but all subsequent attempts make "mount" hang in D state for almost a
minute. The card is mounted and read correctly, though. No other ill
effects noticed.

The reader is a 6-in-1 ICS35 thing which works flawlessly with any other
card, except this one. The card is Canon FC-32M compactflash card.
USB is UHCI.

Call trace of mount:

mount D 39B24413 0 1066 1026 (NOTLB)
d4357a24 00000086 dbc9ecc0 39b24413 00000086 db8dcb00 d4357a0c c01f4446
db8dcb00 39b24413 00000086 dbc9ecc0 dbc9ece0 00002daa 39b24782 00000086
d4357a9c d4356000 d4356000 d4357a78 c011a678 00000000 d2d82140 c011a370
Call Trace:
[elv_next_request+22/272] elv_next_request+0x16/0x110
[<c01f4446>] elv_next_request+0x16/0x110
[wait_for_completion+120/208] wait_for_completion+0x78/0xd0
[<c011a678>] wait_for_completion+0x78/0xd0
[default_wake_function+0/48] default_wake_function+0x0/0x30
[<c011a370>] default_wake_function+0x0/0x30
[default_wake_function+0/48] default_wake_function+0x0/0x30
[<c011a370>] default_wake_function+0x0/0x30
[_end+475509342/1070289096] scsi_wait_req+0x76/0x90 [scsi_mod]
[<dc8c4196>] scsi_wait_req+0x76/0x90 [scsi_mod]
[_end+475509096/1070289096] scsi_wait_done+0x0/0x80 [scsi_mod]
[<dc8c40a0>] scsi_wait_done+0x0/0x80 [scsi_mod]
[_end+475278750/1070289096] sd_read_capacity+0x76/0x350 [sd_mod]
[<dc88bcd6>] sd_read_capacity+0x76/0x350 [sd_mod]
[_end+475280610/1070289096] sd_revalidate_disk+0xea/0x150 [sd_mod]
[<dc88c41a>] sd_revalidate_disk+0xea/0x150 [sd_mod]
[check_disk_change+119/144] check_disk_change+0x77/0x90
[<c015ae97>] check_disk_change+0x77/0x90
[_end+475276457/1070289096] sd_open+0x71/0x100 [sd_mod]
[<dc88b3e1>] sd_open+0x71/0x100 [sd_mod]
[get_gendisk+33/64] get_gendisk+0x21/0x40
[<c01f9291>] get_gendisk+0x21/0x40
[_end+475276344/1070289096] sd_open+0x0/0x100 [sd_mod]
[<dc88b370>] sd_open+0x0/0x100 [sd_mod]
[do_open+305/1024] do_open+0x131/0x400
[<c015b091>] do_open+0x131/0x400
[blkdev_get+101/112] blkdev_get+0x65/0x70
[<c015b3c5>] blkdev_get+0x65/0x70
[do_open+600/1024] do_open+0x258/0x400
[<c015b1b8>] do_open+0x258/0x400
[blkdev_get+101/112] blkdev_get+0x65/0x70
[<c015b3c5>] blkdev_get+0x65/0x70
[open_bdev_excl+81/192] open_bdev_excl+0x51/0xc0
[<c015b811>] open_bdev_excl+0x51/0xc0
[get_sb_bdev+48/336] get_sb_bdev+0x30/0x150
[<c0159de0>] get_sb_bdev+0x30/0x150
[__kmalloc+359/512] __kmalloc+0x167/0x200
[<c013e7a7>] __kmalloc+0x167/0x200
[_end+477299030/1070289096] vfat_get_sb+0x2e/0x40 [vfat]
[<dca7908e>] vfat_get_sb+0x2e/0x40 [vfat]
[_end+477298872/1070289096] vfat_fill_super+0x0/0x70 [vfat]
[<dca78ff0>] vfat_fill_super+0x0/0x70 [vfat]
[do_kern_mount+86/208] do_kern_mount+0x56/0xd0
[<c015a106>] do_kern_mount+0x56/0xd0
[do_add_mount+117/352] do_add_mount+0x75/0x160
[<c016f475>] do_add_mount+0x75/0x160
[__alloc_pages+171/848] __alloc_pages+0xab/0x350
[<c013a14b>] __alloc_pages+0xab/0x350
[do_mount+304/384] do_mount+0x130/0x180
[<c016f790>] do_mount+0x130/0x180
[copy_mount_options+135/256] copy_mount_options+0x87/0x100
[<c016f5e7>] copy_mount_options+0x87/0x100
[sys_mount+180/288] sys_mount+0xb4/0x120
[<c016fb74>] sys_mount+0xb4/0x120
[syscall_call+7/11] syscall_call+0x7/0xb
[<c010952b>] syscall_call+0x7/0xb


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