Performance issues
Hans Petter Selasky
hselasky at c2i.net
Sun Aug 9 16:40:53 UTC 2009
On Sunday 09 August 2009 18:23:41 M. Warner Losh wrote:
> Any ideas how to track this down?
Hi,
USB is only draining from "usbd_transfer_drain()" in
/sys/dev/usb/usb_transfer.c . You could add a print including the backtrace
and see if that function gets called when it freezes.
Else I would try to compile a fresh kernel from USB P4. There are some patches
there in relation to the recent newbus lock change, that might help.
USB uses uppercase "WDRAIN". Is your printout lowercase "wdrain" ?
--HPS
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