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Move the MSIZE and MCLSHIFT options out of the undocumented section in

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NOTES.  Add some comments about the potential problems associated with NIC
driver modules and changing these options.

Fix sorting problems in sys/conf/options with the MSIZE and MCLSHIFT
options.

Reviewed by:	bde
This commit is contained in:
Kenneth D. Merry 2002-07-11 04:15:53 +00:00
parent dbf6d71cba
commit 2c8f5a28bb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=99759
2 changed files with 11 additions and 4 deletions
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11
sys/conf/NOTES
View File

@ -1684,6 +1684,15 @@ device fpa 1
# only works for Tigon II chips, and has no effect for Tigon I chips.
options TI_JUMBO_HDRSPLIT
# These two options allow manipulating the mbuf cluster size and mbuf size,
# respectively. Be very careful with NIC driver modules when changing
# these from their default values, because that can potentially cause a
# mismatch between the mbuf size assumed by the kernel and the mbuf size
# assumed by a module. The only driver that currently has the ability to
# detect a mismatch is ti(4).
options MCLSHIFT=12 # mbuf cluster shift in bits, 12 == 4KB
options MSIZE=512 # mbuf size in bytes
#
# ATM related options (Cranor version)
# (note: this driver cannot be used with the HARP ATM stack)
@ -2269,8 +2278,6 @@ options MSGTQL=41 # Max number of messages in system
options NBUF=512 # Number of buffer headers
options MSIZE=256 # mbuf size in bytes
options MCLSHIFT=12 # mbuf cluster shift in bits, 12 == 4KB
options NMBCLUSTERS=1024 # Number of mbuf clusters
options SCSI_NCR_DEBUG

4
sys/conf/options
View File

@ -407,11 +407,11 @@ DIAGNOSTIC opt_global.h
ENABLE_VFS_IOOPT opt_global.h
INVARIANT_SUPPORT opt_global.h
INVARIANTS opt_global.h
MCLSHIFT opt_global.h
MSIZE opt_global.h
REGRESSION opt_global.h
RESTARTABLE_PANICS opt_global.h
VFS_BIO_DEBUG opt_global.h
MSIZE opt_global.h
MCLSHIFT opt_global.h
# These are VM related options
VM_KMEM_SIZE opt_vm.h