Expand history and authors section of mbuf.9 man page to discuss recent

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.
This commit is contained in:
rwatson 2007-02-15 14:44:46 +00:00
parent 39ed0e3e6d
commit 5b953c01a1

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@ -1122,7 +1122,35 @@ appeared in an early version of
Besides being used for network packets, they were used
to store various dynamic structures, such as routing table
entries, interface addresses, protocol control blocks, etc.
In more recent
.Fx
use of
.Vt mbufs
is almost entirely limited to packet storage, with
.Xr uma 9
zones being used directly to store other network-related memory.
.Pp
Historically, the
.Vt mbuf
allocator has been a special-purpose memory allocator able to run in
interrupt contexts and allocating from a special kernel address space map.
As of
.Fx 5.3 ,
the
.Vt mbuf
allocator is a wrapper around
.Xr uma 9 ,
allowing caching of
.Vt mbufs ,
clusters, and
.Vt mbuf
+ cluster pairs in per-CPU caches, as well as bringing other benefits of
slab allocation.
.Sh AUTHORS
The original
.Nm
manual page was written by Yar Tikhiy.
The
.Xr uma 9
.Vt mbuf
allocator was written by Bosko Milekic.