Attilio Rao c7aebda8a1 The soft and hard busy mechanism rely on the vm object lock to work. ... Unify the 2 concept into a real, minimal, sxlock where the shared acquisition represent the soft busy and the exclusive acquisition represent the hard busy. The old VPO_WANTED mechanism becames the hard-path for this new lock and it becomes per-page rather than per-object. The vm_object lock becames an interlock for this functionality: it can be held in both read or write mode. However, if the vm_object lock is held in read mode while acquiring or releasing the busy state, the thread owner cannot make any assumption on the busy state unless it is also busying it. Also: - Add a new flag to directly shared busy pages while vm_page_alloc and vm_page_grab are being executed. This will be very helpful once these functions happen under a read object lock. - Move the swapping sleep into its own per-object flag The KPI is heavilly changed this is why the version is bumped. It is very likely that some VM ports users will need to change their own code. Sponsored by: EMC / Isilon storage division Discussed with: alc Reviewed by: jeff, kib Tested by: gavin, bapt (older version) Tested by: pho, scottl		2013-08-09 11:11:11 +00:00
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acpica	Consistently use round_page(x) rather than roundup(x, PAGE_SIZE). There is	2013-02-15 22:43:08 +00:00
amd64	The soft and hard busy mechanism rely on the vm object lock to work.	2013-08-09 11:11:11 +00:00
conf	follow up to r254051	2013-08-09 08:11:09 +00:00
ia32	Use slightly more idiomatic expression to get the address of array.	2013-05-27 18:39:39 +00:00
include	Change the pmap_ts_referenced() method of amd64 pmap to use shared	2013-08-07 16:33:15 +00:00
linux32	Retire write-only PCB_GS32BIT pcb flag on amd64.	2013-05-09 21:42:43 +00:00
pci	Remove duplicate code. Reduce diff between amd64 and i386.	2012-12-01 00:56:19 +00:00
vmm	Follow-up commit to fix CR0 issues. Maintain	2013-08-03 03:16:42 +00:00
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