David Greenman 0d94caffca These changes embody the support of the fully coherent merged VM buffer cache, ... much higher filesystem I/O performance, and much better paging performance. It represents the culmination of over 6 months of R&D. The majority of the merged VM/cache work is by John Dyson. The following highlights the most significant changes. Additionally, there are (mostly minor) changes to the various filesystem modules (nfs, msdosfs, etc) to support the new VM/buffer scheme. vfs_bio.c: Significant rewrite of most of vfs_bio to support the merged VM buffer cache scheme. The scheme is almost fully compatible with the old filesystem interface. Significant improvement in the number of opportunities for write clustering. vfs_cluster.c, vfs_subr.c Upgrade and performance enhancements in vfs layer code to support merged VM/buffer cache. Fixup of vfs_cluster to eliminate the bogus pagemove stuff. vm_object.c: Yet more improvements in the collapse code. Elimination of some windows that can cause list corruption. vm_pageout.c: Fixed it, it really works better now. Somehow in 2.0, some "enhancements" broke the code. This code has been reworked from the ground-up. vm_fault.c, vm_page.c, pmap.c, vm_object.c Support for small-block filesystems with merged VM/buffer cache scheme. pmap.c vm_map.c Dynamic kernel VM size, now we dont have to pre-allocate excessive numbers of kernel PTs. vm_glue.c Much simpler and more effective swapping code. No more gratuitous swapping. proc.h Fixed the problem that the p_lock flag was not being cleared on a fork. swap_pager.c, vnode_pager.c Removal of old vfs_bio cruft to support the past pseudo-coherency. Now the code doesn't need it anymore. machdep.c Changes to better support the parameter values for the merged VM/buffer cache scheme. machdep.c, kern_exec.c, vm_glue.c Implemented a seperate submap for temporary exec string space and another one to contain process upages. This eliminates all map fragmentation problems that previously existed. ffs_inode.c, ufs_inode.c, ufs_readwrite.c Changes for merged VM/buffer cache. Add "bypass" support for sneaking in on busy buffers. Submitted by: John Dyson and David Greenman		1995-01-09 16:06:02 +00:00
..
cd9660	Remove the bogus include of <sys/dkbad.h>.	1994-11-14 07:01:58 +00:00
deadfs	Cosmetics: added a #include and a static prototype to silence gcc.	1994-10-08 22:37:00 +00:00
fdescfs	Use tsleep() rather than sleep so that 'ps' is more informative about	1994-10-06 21:07:04 +00:00
fifofs
msdosfs	These changes embody the support of the fully coherent merged VM buffer cache,	1995-01-09 16:06:02 +00:00
nullfs	Cosmetics. reduce the noise from gcc -Wall.	1994-10-10 07:55:48 +00:00
portalfs	Cosmetics. reduce the noise from gcc -Wall.	1994-10-10 07:55:48 +00:00
procfs	Initialize map start hint to vm_map_find()...not doing so will cause it	1995-01-05 03:59:38 +00:00
specfs	Undo a previous change. <sys/disklabel.h> was broken, not these files.	1994-11-14 13:22:52 +00:00
umapfs	Cosmetics. reduce the noise from gcc -Wall.	1994-10-10 07:55:48 +00:00
unionfs	From tim@cs.city.ac.uk (Tim Wilkinson):	1994-11-04 14:41:46 +00:00