Bruce Evans b50641ef9c Fixed glitches (jumps) of about 1/HZ seconds for the i8254 timecounter. ... The old version only worked right when the time was read strictly more often than every 1/HZ seconds, but we only guarantee reading it every (1/HZ + epsilon) seconds. Part of rev.1.126-1.127 attempted to fix this but didn't succeed. Detect counter rollover using the heuristic from the old version of microtime() with additional complications for supporting calls from fast interrupt handlers. This works provided i8254 interrupts are not delayed by more than 1/(2*HZ) seconds. This needs more comments, and cleanups for the SMP case, and more testing of the SMP case before it is merged into RELENG_3. Tested by: jhay		1999-05-28 14:08:59 +00:00
..
apm	Divorce "dev_t" from the "major|minor" bitmap, which is now called	1999-05-11 19:55:07 +00:00
bios	Divorce "dev_t" from the "major|minor" bitmap, which is now called	1999-05-11 19:55:07 +00:00
boot	Back the last change out.	1999-05-25 10:30:52 +00:00
conf	Add new Bt848/Bt878 driver options.	1999-05-28 10:27:22 +00:00
eisa	Fix a [start,end] vs [start,count] botch that corrupted the resource	1999-05-24 03:08:46 +00:00
i386	Fixed glitches (jumps) of about 1/HZ seconds for the i8254 timecounter.	1999-05-28 14:08:59 +00:00
ibcs2	Fix a couple of warnings and some bitrot in comments.	1999-05-09 16:04:14 +00:00
include	Fixed style bugs in previous commit.	1999-05-22 08:36:55 +00:00
isa	Fixed glitches (jumps) of about 1/HZ seconds for the i8254 timecounter.	1999-05-28 14:08:59 +00:00
linux	Divorce "dev_t" from the "major|minor" bitmap, which is now called	1999-05-11 19:55:07 +00:00
pci	Move pcibus (host -> pci bus) probe/attach routines from nexus	1999-05-18 20:48:43 +00:00
svr4	Enable vmspace sharing on SMP. Major changes are,	1999-04-28 01:04:33 +00:00
Makefile	Update to know about current kernel directory layout.	1999-02-28 22:14:16 +00:00