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From: Alexander Motin <mav@FreeBSD.org>
Date: Sat, 16 Oct 2010 19:29:37 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/usb/storage umass.c
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mav         2010-10-16 19:29:37 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/usb/storage  umass.c 
  Log:
  SVN rev 213931 on 2010-10-16 19:29:37Z by mav
  
  Allow umass to use bigger transactions for USB 3.0 devices. It is less
  important for USB 2.0 devices and some of them reported to have problems
  with large transactions. But USB 3.0 benchmarks show that limited number
  of transactions per second on USB makes impossible to reach high transfer
  speeds without using bigger transactions.
  
  On my tests this change allows to read up to 220MB/s from USB-attached SSD
  (at block size of 256-512KB), comparing to only 113MB/s without it.
  
  Reviewed by:    hselasky
  
  Revision  Changes    Path
  1.39      +1 -0      src/sys/dev/usb/storage/umass.c