Luigi Rizzo <[EMAIL PROTECTED]> said: >On Tue, Oct 23, 2001 at 03:17:04PM -0400, Garrett Wollman wrote: >> ... the whole purpose of m_pullup is to >> *guarantee* that the data in question will never be shared. > >Technically, it is correct that m_pullup guarantees that the data >in question will never be shared, but it seems to me more an artifact >of its implementation than a real goal.
It was not a design goal (in fact, the 4.4 daemon book actually claims "If the dtom() macro is eventually removed, m_pullup() will no longer be forced to move data from mbuf clusters." However, the "ensure that the data is not shared" side effect is heavily in at least the multicast code; the bridge code seem to also rely on it. I wouldn't be surprised if there were more. Bill To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-net" in the body of the message
