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20 Commits

Author SHA1 Message Date
John Dyson
d1a5be1064 A few minor mods (improvements) to support more efficient pipe 
operations for large transfers.  There are essentially no differences
for small transfers, but big transfers should perform about 20%
better.
 1996-07-13 22:52:50 +00:00
Bruce Evans
3be8cc7800 Staticized some variables. 
Fixed initialization of pipe_pgid - don't default to pid 0 (swapper) for
SIGIO.

Added comments about other implicit initializations, mostly for struct
stat.

Fixed initialization of st_mode.  S_IFSOCK was for when pipes were sockets.
It is probably safe to fix the bogus S_ISFIFO() now that pipes can be
distinguished from sockets in all cases.

Don't return ENOSYS for inappropriate ioctls.
 1996-07-12 08:14:58 +00:00
John Dyson
c44013cde6 Get rid of PIPE_NBIO, cleaning up the code a bit. 
Reviewed by:	bde
 1996-07-04 04:36:56 +00:00
John Dyson
23fd45be00 Disable direct writes for non-blocking output. 1996-06-17 05:15:01 +00:00
Gary Palmer
c23670e294 Clean up -Wunused warnings. 
Reviewed by:		bde
 1996-06-12 05:11:41 +00:00
John Dyson
d73ce5bd92 Various pipe error return fixes, and a significant typeo fix. From 
Bruce Evans (of course :-)).
Submitted by:	bde
 1996-03-25 01:48:28 +00:00
John Dyson
7fe9c39bea Yet another fix from BDE for the new pipe code. This fixes a potential 
deadlock due to mismanagement of busy counters.

Reviewed by: dyson
Submitted by: bde
 1996-03-17 04:52:10 +00:00
John Dyson
6e20683c9d Fix a problem that select did not work with direct writes. Make 
wakeup channels more consistant also.
 1996-02-22 03:33:52 +00:00
Peter Wemm
add3bbdaef Add missing prototype for pipeselwakeup (a recently added function) - gcc 
bitches about it..
 1996-02-17 14:47:16 +00:00
John Dyson
f3e79aa705 Add ifdefs for non-freebsd system usage. Add missing select wakeups, 
and make the select wakup code a little neater.
 1996-02-11 22:09:50 +00:00
John Dyson
5af564b4f4 Add some missing requests for the read-side to wakeup the write-side. Also 
add some missing wakeups by the write side to the read side.
 1996-02-09 04:36:36 +00:00
John Dyson
26d2f00960 Apparent fix for a pipe hang problem. 1996-02-07 06:41:56 +00:00
John Dyson
f29e1bd629 More fixes from bde. 
Only modify times on success.
	splhigh() around time variable usage.
	Make atomic writes more posix compliant.
	Spelling errors.
Submitted by:	bde
 1996-02-05 05:50:34 +00:00
John Dyson
96cc6b1011 Kva space allocated for direct buffer wasn't quite big enough. The 
system can panic easily without this patch.
 1996-02-05 05:17:15 +00:00
John Dyson
dca5129987 Changed vm_fault_quick in vm_machdep.c to be global. Needed for 
new pipe code.
 1996-02-04 22:09:12 +00:00
John Dyson
2834ceec7c Improve the performance for pipe(2) again. Also include some 
fixes for previous version of new pipes from Bruce Evans.  This
new version:

Supports more properly the semantics of select (BDE).
Supports "OLD_PIPE" correctly (kern_descrip.c, BDE).
Eliminates incorrect EPIPE returns (bash 'pipe broken' messages.)
Much faster yet, currently tuned relatively conservatively -- but now
	gives approx 50% more perf than the new pipes code did originally.
	(That was about 50% more perf than the original BSD pipe code.)

Known bugs outstanding:
	No support for async io (SIGIO).  Will be included soon.

Next to do:
	Merge support for FIFOs.

Submitted by: bde
 1996-02-04 19:56:35 +00:00
John Dyson
4ab7a1a6c7 Fix another problem with the new pipe code, pointed out by Bruce Evans. 
This one fixes a problem with interactions with signals.
 1996-01-31 06:00:45 +00:00
John Dyson
56363b79a9 Fix some problems with return codes on the new pipe stuff. Bruce Evans 
found the problems, and this commit will fix the "first batch" :-).
 1996-01-31 02:05:12 +00:00
John Dyson
4fd00d508b Fixed an uninitialized variable (argument to vm_map_find) -- problem 
that DG detected, and promptly found a fix.
Submitted by:	davidg
 1996-01-29 02:57:33 +00:00
John Dyson
10c5615c1d Added new files to support the new fast pipes. After the follow-on 
commits, pipe performance should increase significantly.  The pipe(2)
system call is currently supported, while fifofs will be added later.
 1996-01-28 23:38:26 +00:00