On Wed, 2006-08-09 at 16:58 -0700, David Miller wrote: > From: Peter Zijlstra <[EMAIL PROTECTED]> > Date: Wed, 09 Aug 2006 16:07:20 +0200 > > > Hmm, what does sk_buff::input_dev do? That seems to store the initial > > device? > > You can run grep on the tree just as easily as I can which is what I > did to answer this question. It only takes a few seconds of your > time to grep the source tree for things like "skb->input_dev", so > would you please do that before asking more questions like this?
That is exactly what I did, but I wanted a bit of confirmation. Sorry if it offends you, but I'm a bit new to this network thing. > It does store the initial device, but as Thomas tried so hard to > explain to you guys these device pointers in the skb are transient and > you cannot refer to them outside of packet receive processing. Yes, I understood that after Thomas' last mail. > The reason is that there is no refcounting performed on these devices > when they are attached to the skb, for performance reasons, and thus > the device can be downed, the module for it removed, etc. long before > the skb is freed up. I understood that, thanks. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
