[Bug 219220] syscalls (ioctls) on USB devices are very slow

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219220

--- Comment #7 from Matthias Apitz <guru at unixarea.de> ---

root at c720-r314251:~ # usbdump -i usbus1
14:13:00.912954 usbus1.2
DONE-CTRL-EP=00000080,SPD=HIGH,NFR=0,SLEN=0,IVAL=0,ERR=TIMEOUT
14:13:00.979775 usbus1.2 SUBM-CTRL-EP=00000080,SPD=HIGH,NFR=2,SLEN=8,IVAL=0
14:13:05.875133 usbus1.2
DONE-CTRL-EP=00000080,SPD=HIGH,NFR=0,SLEN=0,IVAL=0,ERR=TIMEOUT
14:13:05.938475 usbus1.2 SUBM-CTRL-EP=00000080,SPD=HIGH,NFR=2,SLEN=8,IVAL=0
14:13:10.840123 usbus1.2
DONE-CTRL-EP=00000080,SPD=HIGH,NFR=0,SLEN=0,IVAL=0,ERR=TIMEOUT
14:13:10.903602 usbus1.2 SUBM-CTRL-EP=00000080,SPD=HIGH,NFR=2,SLEN=8,IVAL=0
^C
6 packets captured
6 packets received by filter
0 packets dropped by kernel

root at c720-r314251:~ # usbdump -i usbus0

(hangs for ever)

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