On Wed, Aug 14, 2013 at 09:51:54AM -0700, Joe Perches wrote: > On Wed, 2013-08-14 at 09:40 -0700, Sarah Sharp wrote: > > Hi Xenia, > > > > I'm a bit confused. I thought that debugging messages would be turned > > off by default for a module if CONFIG_DYNAMIC_DEBUG was turned on. When > > I tested your patch to remove the CONFIG_USB_XHCI_HCD_DEBUGGING and just > > use dev_dbg, the messages from the xHCI driver appeared in dmesg by > > default. > > > > That generates a lot of log spew. We can have distros add a boot > > parameter option to turn off debug messages, but that boot parameter is > > limited to 1023 characters. I'm concerned that if more drivers add > > dynamic debugging, the distros will eventually run out of space in the > > dynamic debugging boot parameter. I know Greg was ripping out debugging > > config options in other USB drivers, so this is a bit concerning. > > > > Jason, is there a way within the xHCI driver to say that dynamic > > debugging should be off by default? I've looked through the > > documentation, and I can't find anything like that documented. > > #undefine DEBUG > > > I've attached my .config file, in case I have something misconfigured. > > Because of: > > drivers/usb/host/Makefile:ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG Yes, that's the problem, I'm trying to get rid of the CONFIG_USB_DEBUG flag, and I'm almost there. There are some host controllers that still use it for some things that I have not cleaned up fully yet. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
