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| author | Hartmut Brandt <harti@FreeBSD.org> | 2003-07-15 08:59:38 +0000 |
|---|---|---|
| committer | Hartmut Brandt <harti@FreeBSD.org> | 2003-07-15 08:59:38 +0000 |
| commit | 7e9024cdd9a555f05fef1a872eb05e0d4fefebc1 (patch) | |
| tree | eac7c97625d7814908b085bb062256b985ea60a7 /sys/conf/NOTES | |
| parent | 8e36ed92f292b37d496c38412f856b3c7df7bc26 (diff) | |
| download | src-7e9024cdd9a555f05fef1a872eb05e0d4fefebc1.tar.gz src-7e9024cdd9a555f05fef1a872eb05e0d4fefebc1.zip | |
Add a facility for devices, specifically network interfaces, that require
large to huge amounts of small or medium sized receive buffers. The problem
with these situations is that they eat up the available DMA address space
very quickly when using mbufs or even mbuf clusters. Additionally this
facility provides a direct mapping between 32-bit integers and these buffers.
This is needed for devices originally designed for 32-bit systems. Ususally
the virtual address of the buffer is used as a handle to find the buffer as
soon as it is returned by the card. This does not work for 64-bit machines
and hence this mapping is needed.
Notes
Notes:
svn path=/head/; revision=117624
Diffstat (limited to 'sys/conf/NOTES')
| -rw-r--r-- | sys/conf/NOTES | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/conf/NOTES b/sys/conf/NOTES index 857370f9fce6..9c31748c54da 100644 --- a/sys/conf/NOTES +++ b/sys/conf/NOTES @@ -1702,6 +1702,8 @@ device hatm #Fore/Marconi HE155/622 device utopia #ATM PHY driver options NATM #native ATM +options LIBMBPOOL #needed by patm, iatm + # # Audio drivers: `pcm', `sbc', `gusc' # |