freebsd-nq/sys/i386
John Dyson b18bfc3da7 This set of commits to the VM system does the following, and contain
contributions or ideas from Stephen McKay <syssgm@devetir.qld.gov.au>,
Alan Cox <alc@cs.rice.edu>, David Greenman <davidg@freebsd.org> and me:

	More usage of the TAILQ macros.  Additional minor fix to queue.h.
	Performance enhancements to the pageout daemon.
		Addition of a wait in the case that the pageout daemon
		has to run immediately.
		Slightly modify the pageout algorithm.
	Significant revamp of the pmap/fork code:
		1) PTE's and UPAGES's are NO LONGER in the process's map.
		2) PTE's and UPAGES's reside in their own objects.
		3) TOTAL elimination of recursive page table pagefaults.
		4) The page directory now resides in the PTE object.
		5) Implemented pmap_copy, thereby speeding up fork time.
		6) Changed the pv entries so that the head is a pointer
		   and not an entire entry.
		7) Significant cleanup of pmap_protect, and pmap_remove.
		8) Removed significant amounts of machine dependent
		   fork code from vm_glue.  Pushed much of that code into
		   the machine dependent pmap module.
		9) Support more completely the reuse of already zeroed
		   pages (Page table pages and page directories) as being
		   already zeroed.
	Performance and code cleanups in vm_map:
		1) Improved and simplified allocation of map entries.
		2) Improved vm_map_copy code.
		3) Corrected some minor problems in the simplify code.
	Implemented splvm (combo of splbio and splimp.)  The VM code now
		seldom uses splhigh.
	Improved the speed of and simplified kmem_malloc.
	Minor mod to vm_fault to avoid using pre-zeroed pages in the case
		of objects with backing objects along with the already
		existant condition of having a vnode.  (If there is a backing
		object, there will likely be a COW...  With a COW, it isn't
		necessary to start with a pre-zeroed page.)
	Minor reorg of source to perhaps improve locality of ref.
1996-05-18 03:38:05 +00:00
..
apm - This code adds some backwards compatability hacks for buggy APM BIOS 1996-04-23 19:59:14 +00:00
bios - This code adds some backwards compatability hacks for buggy APM BIOS 1996-04-23 19:59:14 +00:00
boot Fixed BOOT_HD_BIAS. 1996-05-11 04:27:24 +00:00
conf A patch for the meteor device driver. It fixes: 1996-05-17 09:43:15 +00:00
eisa Honor the CHANNEL_B_PRIMARY bit of the BIOSCTRL register and probe 1996-05-10 16:14:51 +00:00
i386 This set of commits to the VM system does the following, and contain 1996-05-18 03:38:05 +00:00
ibcs2 Removed unnecessary #includes from <sys/imgact.h> so that it is 1996-05-01 02:43:13 +00:00
include This set of commits to the VM system does the following, and contain 1996-05-18 03:38:05 +00:00
isa Fix the "well-known retries bug" (a logic-o). 1996-05-12 12:36:59 +00:00
linux First pass at cleaning up macros relating to pages, clusters and all that. 1996-05-02 10:43:17 +00:00
pci Make pcibus_check() ignore Device/Vendor IDs of all 0. 1996-04-30 21:37:21 +00:00
scsi Honor the CHANNEL_B_PRIMARY bit of the BIOSCTRL register and probe 1996-05-10 16:21:05 +00:00
Makefile Removed all patch kit headers, sccsid and rcsid strings, put $Id$ in, some 1993-10-16 19:17:18 +00:00