ttyS0: LSR safety check engaged!
ttyS1: LSR safety check engaged!
Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
NFSD: starting 90-second grace period
warning: `ntpd' uses 32-bit capabilities (legacy support in use)
usb 4-1: new full speed USB device using uhci_hcd and address 2
usb 4-1: configuration #1 chosen from 1 choice
gspca: main v2.2.0 registered
gspca: probing 04fc:0561
gspca: probe ok
usbcore: registered new interface driver spca561
spca561: registered
usb 4-1: USB disconnect, address 2
gspca: disconnect complete
usb 4-1: new full speed USB device using uhci_hcd and address 3
usb 4-1: configuration #1 chosen from 1 choice
gspca: probing 046d:0928
gspca: probe ok
usb 5-1: new full speed USB device using uhci_hcd and address 4
usb 5-1: configuration #1 chosen from 1 choice
gspca: probing 04fc:0561
gspca: probe ok
gspca: usb_submit_urb [0] err -28
gspca: usb_submit_urb [0] err -28
hda-intel: IRQ timing workaround is activated for card #0. Suggest a bigger bdl_pos_adj.
usb 6-2: new full speed USB device using uhci_hcd and address 2
usb 6-2: configuration #1 chosen from 1 choice
usbcore: registered new interface driver usbserial
usbserial: USB Serial Driver core
usbserial: USB Serial support registered for pl2303
pl2303 6-2:1.0: pl2303 converter detected
usb 6-2: pl2303 converter now attached to ttyUSB0
usbcore: registered new interface driver pl2303
pl2303: Prolific PL2303 USB to serial adaptor driver
------------[ cut here ]------------
WARNING: at drivers/usb/serial/usb-serial.c:311 serial_write+0x9c/0xa0 [usbserial]()
Modules linked in: pl2303 usbserial gspca_spca561 gspca_main acpi_cpufreq nfsd auth_rpcgss exportfs kvm_intel kvm nfs lockd sunrpc twofish twofish_common serpent blowfish aes_i586 aes_generic xcbc sha256_generic crypto_null af_key dm_snapshot dm_mirror dm_log coretemp w83627ehf hwmon_vid sg joydev usbhid snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd pata_jmicron ata_piix i2c_i801 ahci ehci_hcd soundcore r8169 uhci_hcd snd_page_alloc usbcore [last unloaded: pcspkr]
Pid: 7, comm: events/0 Not tainted 2.6.27-rc5.1-00341-gf98ef8e-dirty #1
 [<40125e74>] warn_on_slowpath+0x54/0x70
 [<4011a787>] ? hrtick_start_fair+0x1a7/0x1b0
 [<4011bea3>] ? enqueue_task_fair+0x33/0x2c0
 [<401236f6>] ? check_preempt_wakeup+0x106/0x180
 [<4020adf9>] ? rb_insert_color+0x99/0xc0
 [<4013b5d5>] ? enqueue_hrtimer+0x75/0x100
 [<c0a9d43c>] serial_write+0x9c/0xa0 [usbserial]
 [<4013bcbe>] ? hrtimer_start+0xae/0x130
 [<4024fddb>] tty_put_char+0x2b/0x40
 [<4011a75e>] ? hrtick_start_fair+0x17e/0x1b0
 [<40253f59>] echo_char+0x49/0x70
 [<40254c5f>] n_tty_receive_buf+0x6cf/0x1180
 [<40207025>] ? __next_cpu+0x15/0x30
 [<4011c664>] ? find_busiest_group+0x134/0x6d0
 [<4011934d>] ? update_curr+0x8d/0xc0
 [<4011a36a>] ? __dequeue_entity+0x2a/0xa0
 [<401228e4>] ? dequeue_task_fair+0xa4/0x110
 [<40256eb5>] ? tty_ldisc_try+0x35/0x50
 [<4025086d>] flush_to_ldisc+0xdd/0x190
 [<40254590>] ? n_tty_receive_buf+0x0/0x1180
 [<40250790>] ? flush_to_ldisc+0x0/0x190
 [<401352f7>] run_workqueue+0x77/0x100
 [<40138a43>] ? prepare_to_wait+0x53/0x60
 [<40135c89>] worker_thread+0x99/0xf0
 [<40138870>] ? autoremove_wake_function+0x0/0x50
 [<40135bf0>] ? worker_thread+0x0/0xf0
 [<40138572>] kthread+0x42/0x70
 [<40138530>] ? kthread+0x0/0x70
 [<40103d63>] kernel_thread_helper+0x7/0x14
 =======================
---[ end trace 68b706884af5ac09 ]---
------------[ cut here ]------------
WARNING: at drivers/usb/serial/usb-serial.c:311 serial_write+0x9c/0xa0 [usbserial]()
Modules linked in: pl2303 usbserial gspca_spca561 gspca_main acpi_cpufreq nfsd auth_rpcgss exportfs kvm_intel kvm nfs lockd sunrpc twofish twofish_common serpent blowfish aes_i586 aes_generic xcbc sha256_generic crypto_null af_key dm_snapshot dm_mirror dm_log coretemp w83627ehf hwmon_vid sg joydev usbhid snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd pata_jmicron ata_piix i2c_i801 ahci ehci_hcd soundcore r8169 uhci_hcd snd_page_alloc usbcore [last unloaded: pcspkr]
Pid: 7, comm: events/0 Tainted: G        W 2.6.27-rc5.1-00341-gf98ef8e-dirty #1
 [<40125e74>] warn_on_slowpath+0x54/0x70
 [<40135a71>] ? __queue_work+0x31/0x40
 [<40135ae8>] ? queue_work_on+0x38/0x50
 [<40135b35>] ? queue_work+0x15/0x20
 [<40135b4f>] ? schedule_work+0xf/0x20
 [<c0a9d82d>] ? usb_serial_port_softint+0xd/0x10 [usbserial]
 [<c0aa5189>] ? pl2303_send+0x139/0x270 [pl2303]
 [<c0aa6285>] ? pl2303_write+0xe5/0x140 [pl2303]
 [<4020adf9>] ? rb_insert_color+0x99/0xc0
 [<c0a9d43c>] serial_write+0x9c/0xa0 [usbserial]
 [<4024fddb>] tty_put_char+0x2b/0x40
 [<4011a74f>] ? hrtick_start_fair+0x16f/0x1b0
 [<40253f66>] echo_char+0x56/0x70
 [<40254c5f>] n_tty_receive_buf+0x6cf/0x1180
 [<40207025>] ? __next_cpu+0x15/0x30
 [<4011c664>] ? find_busiest_group+0x134/0x6d0
 [<4011934d>] ? update_curr+0x8d/0xc0
 [<4011a36a>] ? __dequeue_entity+0x2a/0xa0
 [<401228e4>] ? dequeue_task_fair+0xa4/0x110
 [<40256eb5>] ? tty_ldisc_try+0x35/0x50
 [<4025086d>] flush_to_ldisc+0xdd/0x190
 [<40254590>] ? n_tty_receive_buf+0x0/0x1180
 [<40250790>] ? flush_to_ldisc+0x0/0x190
 [<401352f7>] run_workqueue+0x77/0x100
 [<40138a43>] ? prepare_to_wait+0x53/0x60
 [<40135c89>] worker_thread+0x99/0xf0
 [<40138870>] ? autoremove_wake_function+0x0/0x50
 [<40135bf0>] ? worker_thread+0x0/0xf0
 [<40138572>] kthread+0x42/0x70
 [<40138530>] ? kthread+0x0/0x70
 [<40103d63>] kernel_thread_helper+0x7/0x14
 =======================
---[ end trace 68b706884af5ac09 ]---
------------[ cut here ]------------
WARNING: at drivers/usb/serial/usb-serial.c:324 serial_write_room+0x75/0x80 [usbserial]()
Modules linked in: pl2303 usbserial gspca_spca561 gspca_main acpi_cpufreq nfsd auth_rpcgss exportfs kvm_intel kvm nfs lockd sunrpc twofish twofish_common serpent blowfish aes_i586 aes_generic xcbc sha256_generic crypto_null af_key dm_snapshot dm_mirror dm_log coretemp w83627ehf hwmon_vid sg joydev usbhid snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd pata_jmicron ata_piix i2c_i801 ahci ehci_hcd soundcore r8169 uhci_hcd snd_page_alloc usbcore [last unloaded: pcspkr]
Pid: 7, comm: events/0 Tainted: G        W 2.6.27-rc5.1-00341-gf98ef8e-dirty #1
 [<40125e74>] warn_on_slowpath+0x54/0x70
 [<40135a71>] ? __queue_work+0x31/0x40
 [<40135ae8>] ? queue_work_on+0x38/0x50
 [<40135b35>] ? queue_work+0x15/0x20
 [<40135b4f>] ? schedule_work+0xf/0x20
 [<c0aa519a>] ? pl2303_send+0x14a/0x270 [pl2303]
 [<c0aa6285>] ? pl2303_write+0xe5/0x140 [pl2303]
 [<4020adf9>] ? rb_insert_color+0x99/0xc0
 [<c0a9d395>] serial_write_room+0x75/0x80 [usbserial]
 [<40255e98>] tty_write_room+0x18/0x20
 [<40253d0a>] opost+0x1a/0x220
 [<40253f3d>] echo_char+0x2d/0x70
 [<40254c5f>] n_tty_receive_buf+0x6cf/0x1180
 [<40207025>] ? __next_cpu+0x15/0x30
 [<4011c664>] ? find_busiest_group+0x134/0x6d0
 [<4011934d>] ? update_curr+0x8d/0xc0
 [<4011a36a>] ? __dequeue_entity+0x2a/0xa0
 [<401228e4>] ? dequeue_task_fair+0xa4/0x110
 [<40256eb5>] ? tty_ldisc_try+0x35/0x50
 [<4025086d>] flush_to_ldisc+0xdd/0x190
 [<40254590>] ? n_tty_receive_buf+0x0/0x1180
 [<40250790>] ? flush_to_ldisc+0x0/0x190
 [<401352f7>] run_workqueue+0x77/0x100
 [<40138a43>] ? prepare_to_wait+0x53/0x60
 [<40135c89>] worker_thread+0x99/0xf0
 [<40138870>] ? autoremove_wake_function+0x0/0x50
 [<40135bf0>] ? worker_thread+0x0/0xf0
 [<40138572>] kthread+0x42/0x70
 [<40138530>] ? kthread+0x0/0x70
 [<40103d63>] kernel_thread_helper+0x7/0x14
 =======================
---[ end trace 68b706884af5ac09 ]---
...