Date: Sun, 9 Aug 2009 18:40:53 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Subject: Re: Performance issues Message-ID: <200908091840.55000.hselasky@c2i.net> In-Reply-To: <20090809.102341.2106235641.imp@bsdimp.com> References: <20090809.102341.2106235641.imp@bsdimp.com>
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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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