Since SMPng it wasn't really supported anymore and if it worked
then only by chance. Only very few drivers ever supported it.
Discussed with: yongari
MFC after: 2 weeks
Removed dead code that assumed that M_TRYWAIT can return NULL; it's not true
since the advent of MBUMA.
Reviewed by: arch
There are ongoing disputes as to whether we want to switch to directly using
UMA flags M_WAITOK/M_NOWAIT for mbuf(9) allocation.
free function controlable, instead of passing the KVA of the buffer
storage as the first argument.
Fix all conventional users of the API to pass the KVA of the buffer
as the first argument, to make this a no-op commit.
Likely break the only non-convetional user of the API, after informing
the relevant committer.
Update the mbuf(9) manual page, which was already out of sync on
this point.
Bump __FreeBSD_version to 800016 as there is no way to tell how
many arguments a CPP macro needs any other way.
This paves the way for giving sendfile(9) a way to wait for the
passed storage to have been accessed before returning.
This does not affect the memory layout or size of mbufs.
Parental oversight by: sam and rwatson.
No MFC is anticipated.
transition to mbuma (FreeBSD 5.3) and the fact that mbufs are now limited
almost entirely to packet storage, with straight UMA zones being used for
most other network data types.
alignment restrictive, and help performance on some ethernet cards which
currently copy the entire packet a couple bytes to get the packet aligned
properly...
Wordsmithing by: dwhite
Obtained from: NetBSD (code only)
I'll clean it up later: rwatson
network interface cards smart (or twisted?) enough to be able
to calculate a TCP/UDP checksum for a packet fragmented by the
host CPU. Therefore the paragraph on the case has been revised.
to the nice style used in ifnet(9).
This includes specifying field types, starting descriptions
with a capital letter, and ending them with a full stop.
Improve the language a bit, as well.
Remove a reference to the defunct macro M_COPY_PKTHDR;
document the new functions m_dup_pkthdr() and m_move_pkthdr(),
and the macro variant of the latter, M_MOVE_PKTHDR().
- tagging plaintext "mbuf", "mbuf cluster", and "mbuf chain"
with .Vt (variable type) since all of them are ways of managing
data, i.e., they can be seen as data types;
- using .Vt/.Va instead of .Li (literal) where appropriate;
- tagging plaintext words that actually refer to function arguments
with .Fa.
Suggested by: ru
