On Thu, Jun 07 2007, Evgeniy Polyakov wrote: > On Wed, Jun 06, 2007 at 09:17:25AM +0200, Jens Axboe ([EMAIL PROTECTED]) > wrote: > > > Some pages have zero reference counter here. > > > > But it's somewhat annoying to get pages with zero reference counts > > there, I wonder how that happens. I guess if the skb->data originated > > from kmalloc() then we don't really know. The main intent there was just > > to ensure the page wasn't going away, but clearly it's not good enough > > to ensure that reuse isn't taking place. > > What bout checking if page belongs to kmalloc cache (or any other cache > via priviate pointers) and do not perform any kind of reference counting > on them? I will play with this a bit later today.
That might work, but sounds a little dirty... But there's probably no way around. Be sure to look at the #splice-net branch if you are playing with this, I've updated it a number of times and fixed some bugs in there. Notably it now gets the offset right, and handles fragments and fraglist as well. -- Jens Axboe - 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
