Date: Mon, 31 Dec 2007 01:25:56 +0400 From: Tofig Suleymanov <tofig@freebsd.az> To: Robert Watson <rwatson@FreeBSD.org> Cc: freebsd-net@freebsd.org Subject: Re: if_start running deferred for Giant Message-ID: <47780CE4.3000302@freebsd.az> In-Reply-To: <20071230170217.T6382@fledge.watson.org> References: <4777690B.1030403@freebsd.az> <20071230170217.T6382@fledge.watson.org>
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Robert Watson wrote: > > On Sun, 30 Dec 2007, Tofig Suleymanov wrote: > >> I am writing a driver for Kyocera USB modem for FreeBSD and there are >> a few questions that I am not able to solve alone. I would be >> grateful if someone could point me into the right direction.Here is >> the first one: >> >> Inside the USB_ATTACH() function I initialise the ifnet(9) structure >> and return USB_ATTACH_SUCCESS_RETURN. Everything seems to be fine so >> far (I can see the interface in ifconfig output) except the following >> error notice spit to the console: >> >> xxxxxx kernel: ib0: if_start running deferred for Giant >> >> I am not sure what does this exactly mean. >> >> Any help would be appreciated. > > This occurs when a network device driver has declared itself > IFF_NEEDSGIANT -- that is, has declared that it requires the Giant > lock in order to operate. As this is considered an undesirable state > of affairs for a device driver, a warning is printed. However, in the > case of a USB device driver, it is currently required as the USB > framework is not MPSAFE, so requires Giant. > > Robert N M Watson > Computer Laboratory > University of Cambridge > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" Thanks for clarification. Does it mean that I can ignore this notice when dealing with USB framework ?
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