Am Sonntag, 17. Juni 2012, 19:27:36 schrieb Michael Mol: > So, I'm using dd to write the Gentoo LiveDVD ISO directly to an SDHC > card. I was wondering why the transfer rate had slowed from 20MB/s to > 6MB/s, so I ran 'sudo tail -f /var/log/messages' to see if there were > I/O errors slowing things down. > > What I found was a flood-stream of message blocks that look like this: > > Jun 17 19:21:18 saffron kernel: [39023.458632] usb-storage: > queuecommand_lck called > Jun 17 19:21:18 saffron kernel: [39023.458670] usb-storage: *** thread > awakened. Jun 17 19:21:18 saffron kernel: [39023.458685] usb-storage: > Command WRITE_10 (10 bytes) > Jun 17 19:21:18 saffron kernel: [39023.458687] usb-storage: 2a 00 00 > 2b f3 80 00 00 f0 00 > Jun 17 19:21:18 saffron kernel: [39023.458694] usb-storage: > rts51x_invoke_transport: <--- > Jun 17 19:21:18 saffron kernel: [39023.458697] usb-storage: > rts51x_invoke_transport: working scsi, > intf->pm_usage_cnt:1,power.usage:1 > Jun 17 19:21:18 saffron kernel: [39023.458701] usb-storage: Bulk > Command S 0x43425355 T 0x34ef L 122880 F 0 Trg 0 LUN 0 CL 10 > Jun 17 19:21:18 saffron kernel: [39023.458704] usb-storage: > usb_stor_bulk_transfer_buf: xfer 31 bytes > Jun 17 19:21:18 saffron kernel: [39023.458759] usb-storage: Status > code 0; transferred 31/31 > Jun 17 19:21:18 saffron kernel: [39023.458761] usb-storage: -- transfer > complete Jun 17 19:21:18 saffron kernel: [39023.458763] usb-storage: Bulk > command transfer result=0 > Jun 17 19:21:18 saffron kernel: [39023.458766] usb-storage: > usb_stor_bulk_transfer_sglist: xfer 122880 bytes, 18 entries > Jun 17 19:21:18 saffron kernel: [39023.486031] usb-storage: Status > code 0; transferred 122880/122880 > Jun 17 19:21:18 saffron kernel: [39023.486035] usb-storage: -- transfer > complete Jun 17 19:21:18 saffron kernel: [39023.486037] usb-storage: Bulk > data transfer result 0x0 > Jun 17 19:21:18 saffron kernel: [39023.486039] usb-storage: Attempting > to get CSW... > Jun 17 19:21:18 saffron kernel: [39023.486042] usb-storage: > usb_stor_bulk_transfer_buf: xfer 13 bytes > Jun 17 19:21:18 saffron kernel: [39023.491787] usb-storage: Status > code 0; transferred 13/13 > Jun 17 19:21:18 saffron kernel: [39023.491790] usb-storage: -- transfer > complete Jun 17 19:21:18 saffron kernel: [39023.491793] usb-storage: Bulk > status result = 0 > Jun 17 19:21:18 saffron kernel: [39023.491795] usb-storage: Bulk > Status S 0x53425355 T 0x34ef R 0 Stat 0x0 > Jun 17 19:21:18 saffron kernel: [39023.491800] usb-storage: > rts51x_invoke_transport: state:2 > Jun 17 19:21:18 saffron kernel: [39023.491802] usb-storage: > rts51x_modi_suspend_timer: <---, state:2 > Jun 17 19:21:18 saffron kernel: [39023.491805] usb-storage: > rts51x_modi_suspend_timer: ---> > Jun 17 19:21:18 saffron kernel: [39023.491807] usb-storage: > rts51x_invoke_transport: ---> > Jun 17 19:21:18 saffron kernel: [39023.491809] usb-storage: scsi cmd > done, result=0x0 > Jun 17 19:21:18 saffron kernel: [39023.491815] usb-storage: *** thread > sleeping. > > ... Any idea what kernel configuration flag I may have enabled to > cause these to be continually generated? My first guess would be > something like 'kernel lock debugging'...if that's what I'm seeing > here, where would I go to file a bug report against the usb-storage > subsystem?
more like usb debugging options. -- #163933
