Mark Johnston aed9aaaa76 Synchronize page laundering with pmap_extract_and_hold(). ... Before r207410, the hold count of a page in a page queue was protected by the queue lock, and, before laundering a page, the page daemon removed managed writeable mappings of the page before releasing the queue lock. This ensured that other threads could not concurrently create transient writeable mappings using pmap_extract_and_hold() on a user map, as is done for example by vmapbuf(). With that revision, however, a race can allow the creation of such a mapping, meaning that the page might be modified as it is being laundered, potentially resulting in it being marked clean when its contents do not match those given to the pager. Close the race by using the page lock to synchronize the hold count check in vm_pageout_cluster() with the removal of writeable managed mappings. Reported by: alc Reviewed by: alc, kib MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D12084		2017-08-28 22:10:15 +00:00
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_vm_radix.h	Add pctrie_init() and vm_radix_init() to initialize generic pctrie and	2017-07-19 20:52:47 +00:00
default_pager.c	Provide introductory description of the default pager.	2016-12-14 23:36:32 +00:00
device_pager.c	All these files need sys/vmmeter.h, but now they got it implicitly	2017-04-17 17:07:00 +00:00
memguard.c	All these files need sys/vmmeter.h, but now they got it implicitly	2017-04-17 17:07:00 +00:00
memguard.h
phys_pager.c	Implement the populate() pager method for phys pager.	2016-12-08 11:35:53 +00:00
pmap.h	Add support for pmap_enter(..., psind=1) to the amd64 pmap. In other words,	2017-07-23 06:33:58 +00:00
redzone.c
redzone.h
sg_pager.c	All these files need sys/vmmeter.h, but now they got it implicitly	2017-04-17 17:07:00 +00:00
swap_pager.c	Update a couple vm_object lock assertions in the swap pager to reflect the	2017-08-28 17:02:25 +00:00
swap_pager.h	Remove unused function swap_pager_isswapped().	2017-07-19 17:28:46 +00:00
uma_core.c	When we are in UMA_STARTUP use startup_alloc() for any zone, not for	2017-06-08 21:33:19 +00:00
uma_dbg.c
uma_dbg.h
uma_int.h	uma: eliminate uk_slabsize field	2017-03-11 16:35:36 +00:00
uma.h	Update a comment to reflect reality.	2017-03-13 18:45:25 +00:00
vm_domain.c	Remove cpu_spinwait after seq_consistent.	2016-12-30 06:26:17 +00:00
vm_domain.h
vm_extern.h	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
vm_fault.c	Switching from a global hash table to per-vm_object radix tries for mapping	2017-08-28 16:55:43 +00:00
vm_glue.c	Modify vm_page_grab_pages() to handle VM_ALLOC_NOWAIT.	2017-08-11 16:29:22 +00:00
vm_init.c	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
vm_kern.c	Add vm_page_alloc_after().	2017-08-15 16:39:49 +00:00
vm_kern.h	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
vm_map.c	Disable stack growth when accessed by AIO daemons.	2017-07-19 19:00:32 +00:00
vm_map.h	Treat the addr argument for mmap(2) request without MAP_FIXED flag as	2017-06-28 04:02:36 +00:00
vm_meter.c	Emulate pre-r317061 ABI.	2017-05-02 18:40:41 +00:00
vm_mmap.c	Treat the addr argument for mmap(2) request without MAP_FIXED flag as	2017-06-28 04:02:36 +00:00
vm_object.c	Replace global swhash in swap pager with per-object trie to track swap	2017-08-25 23:13:21 +00:00
vm_object.h	Replace global swhash in swap pager with per-object trie to track swap	2017-08-25 23:13:21 +00:00
vm_page.c	Add vm_page_alloc_after().	2017-08-15 16:39:49 +00:00
vm_page.h	Add vm_page_alloc_after().	2017-08-15 16:39:49 +00:00
vm_pageout.c	Synchronize page laundering with pmap_extract_and_hold().	2017-08-28 22:10:15 +00:00
vm_pageout.h	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
vm_pager.c	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
vm_pager.h	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
vm_param.h	Commit the 64-bit inode project.	2017-05-23 09:29:05 +00:00
vm_phys.c	Ifdef out the unused vm_rr_selectdomain().	2017-02-02 17:44:55 +00:00
vm_phys.h	Remove support for idle page zeroing.	2016-09-03 20:38:13 +00:00
vm_radix.c	Add pctrie_init() and vm_radix_init() to initialize generic pctrie and	2017-07-19 20:52:47 +00:00
vm_radix.h	Add pctrie_init() and vm_radix_init() to initialize generic pctrie and	2017-07-19 20:52:47 +00:00
vm_reserv.c	Utilize pmap_enter(..., psind=1) in vm_fault_soft_fast() on amd64. (The	2017-07-23 16:28:13 +00:00
vm_reserv.h	Utilize pmap_enter(..., psind=1) in vm_fault_soft_fast() on amd64. (The	2017-07-23 16:28:13 +00:00
vm_unix.c	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
vm.h	Implement address space guards.	2017-06-24 17:01:11 +00:00
vnode_pager.c	Mark pages after EOF as clean after pageout.	2017-07-26 20:07:05 +00:00
vnode_pager.h	Mark pages after EOF as clean after pageout.	2017-07-26 20:07:05 +00:00