On Thu, Jul 27 2006, David Miller wrote: > From: Evgeniy Polyakov <[EMAIL PROTECTED]> > Date: Thu, 27 Jul 2006 11:49:02 +0400 > > > I.e. map skb's data to userspace? Not a good idea especially with it's > > tricky lifetime and unability for userspace to inform kernel when it > > finished and skb can be freed (without additional syscall). > > Hmmm... > > If it is paged based, I do not see the problem. Events and calls to > AIO I/O routines make transfer of buffer ownership. The fact that > while kernel (and thus networking stack) "owns" the buffer for an AIO > call, the user can have a valid mapping to it is a unimportant detail.
Ownership may be clear, but "when can I reuse" is tricky. The same issue comes up for vmsplice -> splice to socket. -- 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
