Alan Cox 103cc0f6ea Revert r329254. The underlying cause for the copy-on-write problem in ... multithreaded programs that was addressed by r329254 was in the implementation of pmap_enter() on some architectures, notably, amd64. kib@, markj@ and I have audited all of the pmap_enter() implementations, and fixed the broken ones, specifically, amd64 (r335784, r335971), i386 (r336092), mips (r336248), and riscv (r336294). To be clear, the reason to address the problem within pmap_enter() and revert r329254 is not just a matter of principle. An effect of r329254 was that a copy-on-write fault actually entailed two page faults, not one, even for single-threaded programs. Now, in the expected case for either single- or multithreaded programs, we are back to a single page fault to complete a copy-on-write operation. (In extremely rare circumstances, a multithreaded program could suffer two page faults.) Reviewed by: kib, markj Tested by: truckman MFC after: 3 weeks Differential Revision: https://reviews.freebsd.org/D16301		2018-07-19 17:01:10 +00:00
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_vm_radix.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
default_pager.c	SPDX: wrong license.	2017-11-30 15:45:42 +00:00
device_pager.c	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
memguard.c	Eliminate kmem_arena and kmem_object in preparation for further NUMA commits.	2017-11-28 23:40:54 +00:00
memguard.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
phys_pager.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
pmap.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
redzone.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
redzone.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
sg_pager.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
swap_pager.c	Handle the race between fork/vm_object_split() and faults.	2018-06-14 19:41:02 +00:00
swap_pager.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
uma_core.c	uma: whack main zone counter update in the slow path, freeing side	2018-07-12 22:35:52 +00:00
uma_dbg.c	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
uma_dbg.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
uma_int.h	Sort uma_zone fields according to 64 byte cache line with adjacent line	2018-06-23 08:10:09 +00:00
uma.h	Back pcpu zone with domain correct pages	2018-07-06 02:06:03 +00:00
vm_domainset.c	Use the canonical check for reservation support.	2018-05-19 23:49:13 +00:00
vm_domainset.h	Implement several enhancements to NUMA policies.	2018-03-29 02:54:50 +00:00
vm_extern.h	Make UMA and malloc(9) return non-executable memory in most cases.	2018-06-13 17:04:41 +00:00
vm_fault.c	Revert r329254. The underlying cause for the copy-on-write problem in	2018-07-19 17:01:10 +00:00
vm_glue.c	Account the size of the vslock-ed memory by the thread.	2018-03-24 13:51:27 +00:00
vm_init.c	Make UMA and malloc(9) return non-executable memory in most cases.	2018-06-13 17:04:41 +00:00
vm_kern.c	Make UMA and malloc(9) return non-executable memory in most cases.	2018-06-13 17:04:41 +00:00
vm_kern.h	Make UMA and malloc(9) return non-executable memory in most cases.	2018-06-13 17:04:41 +00:00
vm_map.c	Save a call to pmap_remove() if entry cannot have any pages mapped.	2018-07-06 12:44:48 +00:00
vm_map.h	inline atomics and allow tied modules to inline locks	2018-07-02 19:48:38 +00:00
vm_meter.c	vm: move vm_cnt to __read_mostly now that it is not written to	2018-04-27 05:36:02 +00:00
vm_mmap.c	Use a single, consistent approach to returning success versus failure in	2018-06-04 16:28:06 +00:00
vm_object.c	Fix some races introduced in r332974.	2018-05-04 17:17:30 +00:00
vm_object.h	Use per-domain locks for vm page queue free. Move paging control from	2018-02-06 22:10:07 +00:00
vm_page.c	Create a new macro for static DPCPU data.	2018-07-05 17:13:37 +00:00
vm_page.h	inline atomics and allow tied modules to inline locks	2018-07-02 19:48:38 +00:00
vm_pageout.c	Test PGA_REFERENCED after calling pmap_ts_referenced(), rather than before,	2018-07-15 19:25:15 +00:00
vm_pageout.h	Fix GCC build: Remove redundant pagedaemon_wakeup declaration	2018-03-16 07:05:09 +00:00
vm_pagequeue.h	Make UMA and malloc(9) return non-executable memory in most cases.	2018-06-13 17:04:41 +00:00
vm_pager.c	SPDX: Consider code from Carnegie-Mellon University.	2017-11-30 15:48:35 +00:00
vm_pager.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
vm_param.h	SPDX: Consider code from Carnegie-Mellon University.	2017-11-30 15:48:35 +00:00
vm_phys.c	Allow callers to vm_phys_split_pages() to specify whether insertion should	2018-07-05 02:08:57 +00:00
vm_phys.h	Update the physical page selection strategy used by vm_page_import() so	2018-06-26 18:29:56 +00:00
vm_radix.c	vm: stop passing M_ZERO when allocating radix nodes	2018-06-24 13:08:05 +00:00
vm_radix.h	sys: general adoption of SPDX licensing ID tags.	2017-11-27 15:23:17 +00:00
vm_reserv.c	Use the ticks since the last update to reduce hysteresis in the partpopq and	2018-07-07 01:54:45 +00:00
vm_reserv.h	Lock reservations with a dedicated lock in each reservation. Protect the	2018-03-22 19:21:11 +00:00
vm_swapout_dummy.c	SPDX: Consider code from Carnegie-Mellon University.	2017-11-30 15:48:35 +00:00
vm_swapout.c	Improve VM page queue scalability.	2018-04-24 21:15:54 +00:00
vm_unix.c	Split kern_break from sys_break and use it in linuxulator	2018-06-27 14:45:13 +00:00
vm.h	Move vm_ndomains to vm.h where it can be used with a single header include	2018-03-27 03:27:02 +00:00
vnode_pager.c	Implement several enhancements to NUMA policies.	2018-03-29 02:54:50 +00:00
vnode_pager.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00