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209 Commits

Author SHA1 Message Date
dyson
88532580c7 Apparent fix for a pipe hang problem. 1996-02-07 06:41:56 +00:00
dyson
8682ae1fc5 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
dyson
01c2e97c89 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
dyson
f8428b2cd3 Changed vm_fault_quick in vm_machdep.c to be global. Needed for 
new pipe code.
 1996-02-04 22:09:12 +00:00
dyson
276899d730 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
dyson
b4a48be7d8 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
dyson
78108c6c2f 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
dyson
e2c043171a 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
dyson
026024aadd 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