It might be a hardware resource starvation problem. It is possible to
nice
umass by simply adding a line like:
.interval = 2, /* 2 milliseconds */
Thanks, but it didn't help. Also tried setting it to 1, 4, and 20.
http://svn.freebsd.org/changeset/base/217350
Is this supposed to work for 8.0? Is there more to it than a
couple line change in a .h file?
/usr/src/sys/dev/usb/controller/usb_controller.c: In function
'usb_attach_sub':
/usr/src/sys/dev/usb/controller/usb_controller.c:434: warning: implicit
declaration of function 'PI_SWI'
/usr/src/sys/dev/usb/controller/usb_controller.c:434: warning: nested
extern declaration of 'PI_SWI'
I'm feeding "fwcontrol -u 1 -S /dev/stdin" from a pipe. The write()
to the pipe took over a second. Perhaps connected to the lock
contention
of over a second? The EAGAIN comes from the writev() roughly 20 lines
from the end of /usr/src/usr.sbin/fwcontrol/fwdv.c.
CPU is 98% idle. Data rate is only 3.4 MiB/second.
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