aboutsummaryrefslogtreecommitdiff
path: root/sys/vm/vm_pageout.h
Commit message (Collapse)AuthorAgeFilesLines
* vm_pageout: reduce number of flush() paramsDoug Moore2025-05-301-1/+1
| | | | | | | | | | | | | | | | vm_pageout_flush is called in two places, and in both, the mreq parameter is 0. Drop that parameter, and simplify the calculations that use it. The prunlen and eio parameters are either both NULL, or neither NULL. Drop the prunlen parameter and, when eio is NULL, return the runlen value instead of the numpagedout parameter, which the caller ignores. Change a param from boolean_t* to bool*. Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D50568
* vm: Remove kernel stack swapping support, part 1Mark Johnston2024-07-291-3/+0
| | | | | | | | | - Disconnect the swapout daemon from the page daemon. - Remove swapout() and swapout_procs(). Tested by: pho Reviewed by: alc, imp, kib Differential Revision: https://reviews.freebsd.org/D46112
* sys: Remove ancient SCCS tags.Warner Losh2023-11-271-2/+0
| | | | | | | | Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
* sys: Remove $FreeBSD$: two-line .h patternWarner Losh2023-08-161-2/+0
| | | | Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/
* protosw: retire pr_drain and use EVENTHANDLER(9) directlyGleb Smirnoff2022-08-171-0/+1
| | | | | | | | | | | | | | | The method was called for two different conditions: 1) the VM layer is low on pages or 2) one of UMA zones of mbuf allocator exhausted. This change 2) into a new event handler, but all affected network subsystems modified to subscribe to both, so this change shall not bring functional changes under different low memory situations. There were three subsystems still using pr_drain: TCP, SCTP and frag6. The latter had its protosw entry for the only reason to register its pr_drain method. Reviewed by: tuexen, melifaro Differential revision: https://reviews.freebsd.org/D36164
* Add interruptible variant of vm_wait(9), vm_wait_intr(9).Konstantin Belousov2020-09-081-0/+1
| | | | | | | | | | | | | Also add msleep flags argument to vm_wait_doms(9). Reviewed by: markj Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D24652 Notes: svn path=/head/; revision=365484
* Fix OOM handling of some corner cases.Konstantin Belousov2019-08-161-2/+3
| | | | | | | | | | | | | | | | | | | | In addition to pagedaemon initiating OOM, also do it from the vm_fault() internals. Namely, if the thread waits for a free page to satisfy page fault some preconfigured amount of time, trigger OOM. These triggers are rate-limited, due to a usual case of several threads of the same multi-threaded process to enter fault handler simultaneously. The faults from pagedaemon threads participate in the calculation of OOM rate, but are not under the limit. Reviewed by: markj (previous version) Tested by: pho Discussed with: alc Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D13671 Notes: svn path=/head/; revision=351114
* Provide separate accounting for user-wired pages.Mark Johnston2019-05-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Historically we have not distinguished between kernel wirings and user wirings for accounting purposes. User wirings (via mlock(2)) were subject to a global limit on the number of wired pages, so if large swaths of physical memory were wired by the kernel, as happens with the ZFS ARC among other things, the limit could be exceeded, causing user wirings to fail. The change adds a new counter, v_user_wire_count, which counts the number of virtual pages wired by user processes via mlock(2) and mlockall(2). Only user-wired pages are subject to the system-wide limit which helps provide some safety against deadlocks. In particular, while sources of kernel wirings typically support some backpressure mechanism, there is no way to reclaim user-wired pages shorting of killing the wiring process. The limit is exported as vm.max_user_wired, renamed from vm.max_wired, and changed from u_int to u_long. The choice to count virtual user-wired pages rather than physical pages was done for simplicity. There are mechanisms that can cause user-wired mappings to be destroyed while maintaining a wiring of the backing physical page; these make it difficult to accurately track user wirings at the physical page layer. The change also closes some holes which allowed user wirings to succeed even when they would cause the system limit to be exceeded. For instance, mmap() may now fail with ENOMEM in a process that has called mlockall(MCL_FUTURE) if the new mapping would cause the user wiring limit to be exceeded. Note that bhyve -S is subject to the user wiring limit, which defaults to 1/3 of physical RAM. Users that wish to exceed the limit must tune vm.max_user_wired. Reviewed by: kib, ngie (mlock() test changes) Tested by: pho (earlier version) MFC after: 45 days Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D19908 Notes: svn path=/head/; revision=347532
* linuxkpi: Use pageproc instead of vmprocBen Widawsky2018-11-211-2/+0
| | | | | | | | | | | | | | | | | | | | According to markj@: pageproc contains the page daemon and laundry threads, which are responsible for managing the LRU page queues and writing back dirty pages. vmproc's main task is to swap out kernel stacks when the system is under memory pressure, and swap them back in when necessary. It's a somewhat legacy component of the system and isn't required. You can build a kernel without it by specifying "options NO_SWAPPING" (which is a somewhat misleading name), in which vm_swapout_dummy.c is compiled instead of vm_swapout.c. Based on this, we want pageproc to emulate kswapd, not vmproc. Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D18061 Notes: svn path=/head/; revision=340720
* linuxkpi: Add some basic swap functionsBen Widawsky2018-11-201-0/+3
| | | | | | | | | | | | | | | | | | | | | | These are used by kms-drm to determine various heuristics relate memory conditions. The number of free swap pages is just a variable, and it can be much cheaper by either adding a new getter, or simply extern'ing swap_total. However, this patch opts to use the more expensive, existing interface - since this isn't an operation in a high per path. This allows us to remove some more gpl linuxkpi and do the follo kms-drm: git rm linuxkpi/gplv2/include/linux/swap.h Reviewed by: mmacy, Johannes Lundberg <johalun0@gmail.com> Approved by: emaste (mentor) Differential Revision: https://reviews.freebsd.org/D18052 Notes: svn path=/head/; revision=340709
* Avoid resource deadlocks when one domain has exhausted its memory. AttemptMark Johnston2018-09-061-1/+1
| | | | | | | | | | | | | | | other allowed domains if the requested domain is below the minimum paging threshold. Block in fork only if all domains available to the forking thread are below the severe threshold rather than any. Submitted by: jeff Reported by: mjg Reviewed by: alc, kib, markj Approved by: re (rgrimes) Differential Revision: https://reviews.freebsd.org/D16191 Notes: svn path=/head/; revision=338507
* Fix GCC build: Remove redundant pagedaemon_wakeup declarationConrad Meyer2018-03-161-1/+0
| | | | | | | | | | Introduced in r331018. Reported by: kevans Sponsored by: Dell EMC Isilon Notes: svn path=/head/; revision=331048
* Hide all vm/vm_pageout.h content under #ifdef _KERNEL.Konstantin Belousov2018-02-241-2/+3
| | | | | | | | | | | | | | | | | | There are no parts useful for usermode applications in vm/vm_pageout.h. Even for the specific applications like fstat and lsof. In my opinion, this protection is redundant and instead userspace should not include the header at all. Since there are apparently broken third party codebases, give them a bit of slack by providing transitional period. Reported by: julian Sponsored by: The FreeBSD Foundation MFC after: 1 week Notes: svn path=/head/; revision=329905
* vm_wait() rework.Konstantin Belousov2018-02-201-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Make vm_wait() take the vm_object argument which specifies the domain set to wait for the min condition pass. If there is no object associated with the wait, use curthread' policy domainset. The mechanics of the wait in vm_wait() and vm_wait_domain() is supplied by the new helper vm_wait_doms(), which directly takes the bitmask of the domains to wait for passing min condition. Eliminate pagedaemon_wait(). vm_domain_clear() handles the same operations. Eliminate VM_WAIT and VM_WAITPFAULT macros, the direct functions calls are enough. Eliminate several control state variables from vm_domain, unneeded after the vm_wait() conversion. Scetched and reviewed by: jeff Tested by: pho Sponsored by: The FreeBSD Foundation, Mellanox Technologies Differential revision: https://reviews.freebsd.org/D14384 Notes: svn path=/head/; revision=329636
* Use per-domain locks for vm page queue free. Move paging control fromJeff Roberson2018-02-061-4/+5
| | | | | | | | | | | | | | global to per-domain state. Protect reservations with the free lock from the domain that they belong to. Refactor to make vm domains more of a first class object. Reviewed by: markj, kib, gallatin Tested by: pho Sponsored by: Netflix, Dell/EMC Isilon Differential Revision: https://reviews.freebsd.org/D14000 Notes: svn path=/head/; revision=328954
* After r327168, the variable "vm_pageout_wanted" can be static.Alan Cox2017-12-291-1/+0
| | | | | | | MFC after: 2 weeks Notes: svn path=/head/; revision=327349
* Fix two problems with the page daemon control loop.Mark Johnston2017-12-241-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both issues caused the page daemon to erroneously go to sleep when applications are consuming free pages at a high rate, leaving the application threads blocked in VM_WAIT. 1) After completing an inactive queue scan, concurrent allocations may have prevented the page daemon from meeting the v_free_min threshold. In this case, the page daemon was going to sleep even when the inactive queue contained plenty of clean pages. 2) pagedaemon_wakeup() may be called without the free queues lock held. This can lead to a lost wakeup if a call occurs after the page daemon clears vm_pageout_wanted but before going to sleep. Fix 1) by ensuring that we start a new inactive queue scan immediately if v_free_count < v_free_min after a prior scan. Fix 2) by adding a new subroutine, pagedaemon_wait(), called from vm_wait() and vm_waitpfault(). It wakes up the page daemon if either vm_pages_needed or vm_pageout_wanted is false, and atomically sleeps on v_free_count. Reported by: jeff Reviewed by: alc MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D13424 Notes: svn path=/head/; revision=327168
* SPDX: Consider code from Carnegie-Mellon University.Pedro F. Giffuni2017-11-301-1/+1
| | | | | | | Interesting cases, most likely from CMU Mach sources. Notes: svn path=/head/; revision=326403
* sys: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-201-0/+2
| | | | | | | | | | | | | | | | | Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point. Notes: svn path=/head/; revision=326023
* Move swapout code into vm/vm_swapout.c.Konstantin Belousov2017-10-201-6/+3
| | | | | | | | | | | | | There is no NO_SWAPPING #ifdef left in the code. Requested by: alc Reviewed by: alc, markj Sponsored by: The FreeBSD Foundation MFC after: 3 weeks Differential revision: https://reviews.freebsd.org/D12663 Notes: svn path=/head/; revision=324795
* Renumber copyright clause 4Warner Losh2017-02-281-1/+1
| | | | | | | | | | | | Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96 Notes: svn path=/head/; revision=314436
* call vm_lowmem hook in uma_reclaim_workerAndriy Gapon2017-02-251-0/+6
| | | | | | | | | | | | | | | | | | A comment near kmem_reclaim() implies that we already did that. Calling the hook is useful, because some handlers, e.g. ARC, might be able to release significant amounts of KVA. Now that we have more than one place where vm_lowmem hook is called, use this change as an opportunity to introduce flags that describe a reason for calling the hook. No handler makes use of the flags yet. Reviewed by: markj, kib MFC after: 1 week Sponsored by: Panzura Differential Revision: https://reviews.freebsd.org/D9764 Notes: svn path=/head/; revision=314272
* The flag "vm_pages_needed" has long served two distinct purposes: (1) toAlan Cox2016-05-271-1/+2
| | | | | | | | | | | | | | | | | | | indicate that threads are waiting for free pages to become available and (2) to indicate whether a wakeup call has been sent to the page daemon. The trouble is that a single flag cannot really serve both purposes, because we have two distinct targets for when to wakeup threads waiting for free pages versus when the page daemon has completed its work. In particular, the flag will be cleared by vm_page_free() before the page daemon has met its target, and this can lead to the OOM killer being invoked prematurely. To address this problem, a new flag "vm_pageout_wanted" is introduced. Discussed with: jeff Reviewed by: kib, markj Tested by: markj Sponsored by: EMC / Isilon Storage Division Notes: svn path=/head/; revision=300865
* Introduce a new mechanism for relocating virtual pages to a new physicalAlan Cox2015-12-191-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | address and use this mechanism when: 1. kmem_alloc_{attr,contig}() can't find suitable free pages in the physical memory allocator's free page lists. This replaces the long-standing approach of scanning the inactive and inactive queues, converting clean pages into PG_CACHED pages and laundering dirty pages. In contrast, the new mechanism does not use PG_CACHED pages nor does it trigger a large number of I/O operations. 2. on 32-bit MIPS processors, uma_small_alloc() and the pmap can't find free pages in the physical memory allocator's free page lists that are covered by the direct map. Tested by: adrian 3. ttm_bo_global_init() and ttm_vm_page_alloc_dma32() can't find suitable free pages in the physical memory allocator's free page lists. In the coming months, I expect that this new mechanism will be applied in other places. For example, balloon drivers should use relocation to minimize fragmentation of the guest physical address space. Make vm_phys_alloc_contig() a little smarter (and more efficient in some cases). Specifically, use vm_phys_segs[] earlier to avoid scanning free page lists that can't possibly contain suitable pages. Reviewed by: kib, markj Glanced at: jhb Discussed with: jeff Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D4444 Notes: svn path=/head/; revision=292469
* Reduce the scope of a variable to the only file where it is used.Alan Cox2015-10-031-1/+0
| | | | Notes: svn path=/head/; revision=288627
* Move what remains of vm/vm_contig.c into vm/vm_pageout.c, where similarAlan Cox2012-07-181-3/+1
| | | | | | | | | code resides. Rename vm_contig_grow_cache() to vm_pageout_grow_cache(). Reviewed by: kib Notes: svn path=/head/; revision=238561
* In vm_object_page_clean(), do not clean OBJ_MIGHTBEDIRTY object flagKonstantin Belousov2012-03-171-1/+1
| | | | | | | | | | | | | | | | | | | | | if the filesystem performed short write and we are skipping the page due to this. Propogate write error from the pager back to the callers of vm_pageout_flush(). Report the failure to write a page from the requested range as the FALSE return value from vm_object_page_clean(), and propagate it back to msync(2) to return EIO to usermode. While there, convert the clearobjflags variable in the vm_object_page_clean() and arguments of the helper functions to boolean. PR: kern/165927 Reviewed by: alc MFC after: 2 weeks Notes: svn path=/head/; revision=233100
* vm_pageout_flush() might cache the pages that finished write to theKonstantin Belousov2010-11-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | backing storage. Such pages might be then reused, racing with the assert in vm_object_page_collect_flush() that verified that dirty pages from the run (most likely, pages with VM_PAGER_AGAIN status) are write-protected still. In fact, the page indexes for the pages that were removed from the object page list should be ignored by vm_object_page_clean(). Return the length of successfully written run from vm_pageout_flush(), that is, the count of pages between requested page and first page after requested with status VM_PAGER_AGAIN. Supply the requested page index in the array to vm_pageout_flush(). Use the returned run length to forward the index of next page to clean in vm_object_page_clean(). Reported by: avg Reviewed by: alc MFC after: 1 week Notes: svn path=/head/; revision=215471
* Make vm_contig_grow_cache() extern, and use it when vm_phys_alloc_contig()Jayachandran C.2010-06-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | fails to allocate MIPS page table pages. The current usage of VM_WAIT in case of vm_phys_alloc_contig() failure is not correct, because: "There is no guarantee that any of the available free (or cached) pages after the VM_WAIT will fall within the range of suitable physical addresses. Every time this function sleeps and a single page is freed (or cached) by someone else, this function will be reawakened. With a little bad luck, you could spin indefinitely." We also add low and high parameters to vm_contig_grow_cache() and vm_contig_launder() so that we restrict vm_contig_launder() to the range of pages we are interested in. Reported by: alc Reviewed by: alc Approved by: rrs (mentor) Notes: svn path=/head/; revision=208794
* Add a helper function vm_pageout_page_lock(), similar to tegge'Konstantin Belousov2010-05-061-0/+1
| | | | | | | | | | | | | | | | vm_pageout_fallback_object_lock(), to obtain the page lock while having page queue lock locked, and still maintain the page position in a queue. Use the helper to lock the page in the pageout daemon and contig launder iterators instead of skipping the page if its lock is contested. Skipping locked pages easily causes pagedaemon or launder to not make a progress with page cleaning. Proposed and reviewed by: alc Notes: svn path=/head/; revision=207694
* Move the code for doing out-of-memory grass from vm_pageout_scan()Konstantin Belousov2008-09-291-0/+4
| | | | | | | | | | | | | | | into the separate function vm_pageout_oom(). Supply a parameter for vm_pageout_oom() describing a reason for the call. Call vm_pageout_oom() from the swp_pager_meta_build() when swap zone is exhausted. Reviewed by: alc Tested by: pho, jhb MFC after: 2 weeks Notes: svn path=/head/; revision=183474
* Make contigmalloc(9)'s page laundering more robust. Specifically, useAlan Cox2007-11-251-0/+1
| | | | | | | | | | | | vm_pageout_fallback_object_lock() in vm_contig_launder_page() to better handle a lock-ordering problem. Consequently, trylock's failure on the page's containing object no longer implies that the page cannot be laundered. MFC after: 6 weeks Notes: svn path=/head/; revision=173918
* /* -> /*- for license, minor formatting changesWarner Losh2005-01-071-1/+1
| | | | Notes: svn path=/head/; revision=139825
* Disable U area swapping and remove the routines that create, destroy,David Schultz2004-11-201-6/+0
| | | | | | | | | copy, and swap U areas. Reviewed by: arch@ Notes: svn path=/head/; revision=137910
* Remove advertising clause from University of California Regent's license,Warner Losh2004-04-061-4/+0
| | | | | | | | | per letter dated July 22, 1999. Approved by: core Notes: svn path=/head/; revision=127961
* - Increase the object lock's scope in vm_contig_launder() so that accessAlan Cox2003-10-181-1/+1
| | | | | | | | | | | | to the object's type field and the call to vm_pageout_flush() are synchronized. - The above change allows for the eliminaton of the last parameter to vm_pageout_flush(). - Synchronize access to the page's valid field in vm_pageout_flush() using the containing object's lock. Notes: svn path=/head/; revision=121226
* Change the layout policy of the swap_pager from a hardcoded widthPoul-Henning Kamp2003-08-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | striping to a per device round-robin algorithm. Because of the policy of not attempting to retain previous swap allocation on page-out, this means that a newly added swap device almost instantly takes its 1/N share of the I/O load but it takes somewhat longer for it to assume it's 1/N share of the pages if there is plenty of space on the other devices. Change the 8G total swapspace limitation to 8G per device instead by using a per device blist rather than one global blist. This reduces the memory footprint by 75% (typically a couple hundred kilobytes) for the common case with one swapdevice but NSWAPDEV=4. Remove the compile time constant limit of number of swap devices, there is no limit now. Instead of a fixed size array, store the per swapdev structure in a TAILQ. Total swap space is still addressed by a 32 bit page number and therefore the upper limit is now 2^42 bytes = 16TB (for i386). We still do not allocate the first page of each device in order to give some amount of protection to any bsdlabel at the start of the device. A new device is appended after the existing devices in the swap space, no attempt is made to fill in holes left behind by swapoff (this can trivially be changed should it ever become a problem). The sysctl vm.nswapdev now reflects the number of currently configured swap devices. Rename vm_swap_size to swap_pager_avail for consistency with other exported names. Change argument type for vm_proc_swapin_all() and swap_pager_isswapped() to be a struct swdevt pointer rather than an index. Not changed: we are still using blists to manage the free space, but since the swapspace is no longer fragmented by the striping different resource managers might fare better. Notes: svn path=/head/; revision=118390
* Move a declaration to its proper place.Alan Cox2003-05-031-0/+1
| | | | Notes: svn path=/head/; revision=114564
* Remove unused declarations and definitions.Alan Cox2003-04-291-6/+0
| | | | Notes: svn path=/head/; revision=114245
* - Move swap_pager_isswapped()'s prototype to a more logical place.Alan Cox2003-04-241-1/+0
| | | | Notes: svn path=/head/; revision=113956
* - Acquire the vm_object's lock when performing vm_object_page_clean().Alan Cox2003-04-241-1/+1
| | | | | | | | | - Add a parameter to vm_pageout_flush() that tells vm_pageout_flush() whether its caller has locked the vm_object. (This is a temporary measure to bootstrap vm_object locking.) Notes: svn path=/head/; revision=113955
* Make vm_pageout_page_free() static.Alan Cox2003-01-141-1/+0
| | | | Notes: svn path=/head/; revision=109216
* This is David Schultz's swapoff code which I am finally able to commit.Matthew Dillon2002-12-151-0/+6
| | | | | | | | | | This should be considered highly experimental for the moment. Submitted by: David Schultz <dschultz@uclink.Berkeley.EDU> MFC after: 3 weeks Notes: svn path=/head/; revision=107913
* Remove __P.Alfred Perlstein2002-03-191-7/+7
| | | | Notes: svn path=/head/; revision=92727
* - Remove a number of extra newlines that do not belong here according toEivind Eklund2002-03-101-3/+1
| | | | | | | | | | | | style(9) - Minor space adjustment in cases where we have "( ", " )", if(), return(), while(), for(), etc. - Add /* SYMBOL */ after a few #endifs. Reviewed by: alc Notes: svn path=/head/; revision=92029
* Changes to make the OOM killer much more effective:Mike Silbersack2002-02-191-0/+2
| | | | | | | | | | | | | | | - Allow the OOM killer to target processes currently locked in memory. These very often are the ones doing the memory hogging. - Drop the wakeup priority of processes currently sleeping while waiting for their page fault to complete. In order for the OOM killer to work well, the killed process and other system processes waiting on memory must be allowed to wakeup first. Reviewed by: dillon MFC after: 1 week Notes: svn path=/head/; revision=90935
* - Remove asleep(), await(), and M_ASLEEP.John Baldwin2001-08-101-2/+0
| | | | | | | | | | | | - Callers of asleep() and await() have been converted to calling tsleep(). The only caller outside of M_ASLEEP was the ata driver, which called both asleep() and await() with spl-raised, so there was no need for the asleep() and await() pair. M_ASLEEP was unused. Reviewed by: jasone, peter Notes: svn path=/head/; revision=81397
* Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"Peter Wemm1999-12-291-1/+1
| | | | | | | | | is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come. Notes: svn path=/head/; revision=55206
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* This is a rather large commit that encompasses the new swapper,Matthew Dillon1999-01-211-1/+3
| | | | | | | | | | | | | changes to the VM system to support the new swapper, VM bug fixes, several VM optimizations, and some additional revamping of the VM code. The specific bug fixes will be documented with additional forced commits. This commit is somewhat rough in regards to code cleanup issues. Reviewed by: "John S. Dyson" <root@dyson.iquest.net>, "David Greenman" <dg@root.com> Notes: svn path=/head/; revision=42957
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-27 13:44:25 +0000