Alan Cox 0164e05781 Replace the linear search in vm_map_findspace() with an O(log n) ... algorithm built into the map entry splay tree. This replaces the first_free hint in struct vm_map with two fields in vm_map_entry: adj_free, the amount of free space following a map entry, and max_free, the maximum amount of free space in the entry's subtree. These fields make it possible to find a first-fit free region of a given size in one pass down the tree, so O(log n) amortized using splay trees. This significantly reduces the overhead in vm_map_findspace() for applications that mmap() many hundreds or thousands of regions, and has a negligible slowdown (0.1%) on buildworld. See, for example, the discussion of a micro-benchmark titled "Some mmap observations compared to Linux 2.6/OpenBSD" on -hackers in late October 2003. OpenBSD adopted this approach in March 2002, and NetBSD added it in November 2003, both with Red-Black trees. Submitted by: Mark W. Krentel		2004-08-13 08:06:34 +00:00
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default_pager.c	Access the swap_pagers' ->putpages() through swappagerops instead	2003-08-06 12:05:48 +00:00
device_pager.c	In dev_pager_updatefake, m->valid is typically 0 on entry. It	2004-08-04 08:58:58 +00:00
phys_pager.c	Zero the physical page only if it is invalid and not prezeroed.	2004-04-25 07:58:59 +00:00
pmap.h	- pmap_kenter_temporary() is unused by machine-independent code. Therefore,	2004-04-10 22:41:46 +00:00
swap_pager.c	Tag all geom classes in the tree with a version number.	2004-08-08 07:57:53 +00:00
swap_pager.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
uma_core.c	Generate KTR trace records for uma_zalloc_arg() and uma_zfree_arg().	2004-08-06 21:52:38 +00:00
uma_dbg.c	* Add a "how" argument to uma_zone constructors and initialization functions	2004-08-02 00:18:36 +00:00
uma_dbg.h	* Add a "how" argument to uma_zone constructors and initialization functions	2004-08-02 00:18:36 +00:00
uma_int.h	Rework the way slab header storage space is calculated in UMA.	2004-07-29 15:25:40 +00:00
uma.h	* Add a "how" argument to uma_zone constructors and initialization functions	2004-08-02 00:18:36 +00:00
vm_contig.c	Turn on the new contigmalloc(9) by default. There should not actually	2004-08-05 21:54:11 +00:00
vm_extern.h	For years, kmem_alloc_pageable() has been misused. Now that the last of	2004-07-25 20:08:59 +00:00
vm_fault.c	The vm map lock is needed in vm_fault() after the page has been found,	2004-08-12 20:14:49 +00:00
vm_glue.c	Giant is no longer required by vm_waitproc() and vmspace_exitfree().	2004-07-30 20:31:02 +00:00
vm_init.c	Remove dead code. A vm_map's first_free is never NULL (even if the map is	2004-08-07 05:58:31 +00:00
vm_kern.c	Back out all behavioral chnages.	2004-08-10 14:42:48 +00:00
vm_kern.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_map.c	Replace the linear search in vm_map_findspace() with an O(log n)	2004-08-13 08:06:34 +00:00
vm_map.h	Replace the linear search in vm_map_findspace() with an O(log n)	2004-08-13 08:06:34 +00:00
vm_meter.c	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_mmap.c	Remove a product specific workaround for wrong modes when mmap(2)'ing	2004-08-05 07:04:33 +00:00
vm_object.c	* Add a "how" argument to uma_zone constructors and initialization functions	2004-08-02 00:18:36 +00:00
vm_object.h	Make the code and comments for vm_object_coalesce() consistent.	2004-07-25 07:48:47 +00:00
vm_page.c	Advance the state of pmap locking on alpha, amd64, and i386.	2004-07-29 18:56:31 +00:00
vm_page.h	Reimplement contigmalloc(9) with an algorithm which stands a greatly-	2004-07-19 06:21:27 +00:00
vm_pageout.c	Remove the GIANT_REQUIRED preceding pmap_remove() in	2004-07-18 04:38:11 +00:00
vm_pageout.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_pageq.c	Remove references to L1 in the comments, according to Alan they are	2004-06-07 19:33:05 +00:00
vm_pager.c	The demise of vm_pager_map_page() in revision 1.93 of vm/vm_pager.c permits	2004-04-08 19:08:49 +00:00
vm_pager.h	The demise of vm_pager_map_page() in revision 1.93 of vm/vm_pager.c permits	2004-04-08 19:08:49 +00:00
vm_param.h	Second half of the dev_t cleanup.	2004-06-17 17:16:53 +00:00
vm_unix.c	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_zeroidle.c	Implement preemption of kernel threads natively in the scheduler rather	2004-07-02 20:21:44 +00:00
vm.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vnode_pager.c	Make vm_page's PG_ZERO flag immutable between the time of the page's	2004-05-06 05:03:23 +00:00
vnode_pager.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00