Re: [2.6.16 PATCH] Filessytem Events Reporter V2

[Yi Yang <yang.y.yi@gmail.com>]

Evgeniy Polyakov 写道:
> On Fri, Apr 07, 2006 at 06:03:04PM +0800, Yi Yang (yang.y.yi@gmail.com) wrote:
>   
> > > > Can you explain why there is such a big difference between 
> > > > netlink_unicast and netlink_broadcast?
> > > >    
> > > >         
> > > Netlink broadcast clones skbs, while unicasting requires the whole new
> > > one.
> > >  
> > >       
> > No, I also use clone to send skb, so they should have the same overhead.
> >     
>
> I missed that.
> After rereading fsevent_send_to_process() I do not see how original skb
> is freed though.
>   
I'm considering how to free it, because cloned skbs share data with 
original skb, so this case is special,
I try to clarify the logic of kfree_skb.
>   
> > > > > Btw, you need some rebalancing of the per-cpu queues, probably in
> > > > > keventd, since CPUs can go offline and your messages will stuck foreve
> > > > > there.
> > > > >
> > > > >      
> > > > >           
> > > > Does keventd not do it? if so, keventd should be modified.
> > > >    
> > > >         
> > > How does keventd know about your own structures?
> > > You have an per-cpu object, but your keventd function gets object 
> > >       
> > >from running cpu, not from any other cpus.
> >     
>
>   

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/