[Bug 244356] Writing to a USB 3.0 stick is very slow

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244356

--- Comment #8 from Sebastien Boisvert <seb at boisvert.info> ---
Created attachment 211912
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=211912&action=edit
Output of dmesg with hw.usb.umass.debug=-1 with 2 Kingston DataTraveler 2.0

USB devices plugged in (no USB 3.0):

ugen1.1: <0x1022 XHCI root HUB> at usbus1, cfg=0 md=HOST spd=SUPER (5.0Gbps)
pwr=SAVE (0mA)
ugen0.1: <0x1022 XHCI root HUB> at usbus0, cfg=0 md=HOST spd=SUPER (5.0Gbps)
pwr=SAVE (0mA)
ugen0.2: <vendor 0x8087 product 0x0aa7> at usbus0, cfg=0 md=HOST spd=FULL
(12Mbps) pwr=ON (100mA)
ugen1.2: <Kingston DataTraveler 2.0> at usbus1, cfg=0 md=HOST spd=HIGH
(480Mbps) pwr=ON (100mA)
ugen0.3: <Kingston DataTraveler 2.0> at usbus0, cfg=0 md=HOST spd=HIGH
(480Mbps) pwr=ON (100mA)
ugen0.4: <Chicony USB Keyboard> at usbus0, cfg=0 md=HOST spd=LOW (1.5Mbps)
pwr=ON (100mA)

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