Commit Graph

14 Commits

Author SHA1 Message Date
Bruce Evans
12bc45a8df Fix clist limits. They were usually one too low. E.g., for a limit of
TTYHOG = 1024 bytes, 10 cblocks were reserved.  This was thought to
provide 10 * CBSIZE = 1080 bytes of buffering, but if the head pointer
is at the end of a cblock, then it only provides 1 + 9 * CBSIZE = 973
bytes of buffering.  This caused serious data loss for ptys because the
flow control is deterministic and requires at least TTYHOG bytes of
buffering.  For ttys, if input flow control is used then there is
usually enough slop in the high watermark to avoid problems, and if
input flow control isn't used then a limit of 973 is not much different
from a limit of 1024.

Add prototypes.

Continue cleaning up new init stuff.
1995-10-25 17:59:58 +00:00
David Greenman
4590fd3a2a Fixed init functions argument type - caddr_t -> void *. Fixed a couple of
compiler warnings.
1995-09-09 18:10:37 +00:00
Julian Elischer
2b14f991e6 Reviewed by: julian with quick glances by bruce and others
Submitted by:	terry (terry lambert)
This is  a composite of 3 patch sets submitted by terry.
they are:
New low-level init code that supports loadbal modules better
some cleanups in the namei code to help terry in 16-bit character support
some changes to the mount-root code to make it a little more
modular..

NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able
to test those cases..

certainly mounting root of disk still works just fine..
mfs should work but is untested. (tomorrows task)

The low level init stuff includes a total rewrite of init_main.c
to make it possible for new modules to have an init phase by simply
adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can
be added to the kernel without editing any other files other than the
'files' file.
1995-08-28 09:19:25 +00:00
Bruce Evans
270d5e9f91 Optimize the zeroing of quotes. b_to_q() was always taking about 20% of
its time zeroing quotes although quotes are not very common.  E.g., there
are never any quotes in output queues.
1995-07-11 19:39:54 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
Bruce Evans
d1a795a280 Fix cblock starvation bugs by reserving enough cblocks for minimal
operation of each clist.  Limit the growth of each clist.  Clists
can only grow larger than the reserved minimum if there are free
cblocks in a shared pool.  The size of this pool is now fixed
(this could be improved).  The reserved and maximum sizes are more
carefully allocated for slip and ppp, depending on the mtu.  A maximum
MTU of 16384 is now enforced for ppp.
1994-11-26 19:24:13 +00:00
Bruce Evans
a6a21d9edf Don't attempt to free null cblocks. There may be less to free than
normal due to cblock resource starvation or malloc() failing when
the device is opened.
1994-10-30 19:43:49 +00:00
Poul-Henning Kamp
bb56ec4a05 While in the real world, I had a bad case of being swapped out for a lot of
cycles.  While waiting there I added a lot of the extra ()'s I have, (I have
never used LISP to any extent).  So I compiled the kernel with -Wall and
shut up a lot of "suggest you add ()'s", removed a bunch of unused var's
and added a couple of declarations here and there.  Having a lap-top is
highly recommended.  My kernel still runs, yell at me if you kernel breaks.
1994-09-25 19:34:02 +00:00
David Greenman
b18394cb09 Removed prototype for cblock_alloc_cblocks (and moved it into tty.h). 1994-09-13 16:02:20 +00:00
David Greenman
3c4dd3568f Added $Id$ 1994-08-02 07:55:43 +00:00
David Greenman
329cfeccd5 Don't panic if we can't malloc a cblock...just print a console message
and be happy.
1994-05-29 07:50:11 +00:00
David Greenman
b6504a8d7c Completed version of my clist management code. Requires hooks in tty.c
for adding and removing cblocks from the cfreelist queue (to give them
back to malloc). I'll add those tomorrow.
1994-05-27 12:28:05 +00:00
Rodney W. Grimes
26f9a76710 The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch.
Reviewed by:	Rodney W. Grimes
Submitted by:	John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
Rodney W. Grimes
df8bae1de4 BSD 4.4 Lite Kernel Sources 1994-05-24 10:09:53 +00:00