Alan Cox d19ef81437 The synchronization provided by vm object locking has eliminated the ... need for most calls to vm_page_busy(). Specifically, most calls to vm_page_busy() occur immediately prior to a call to vm_page_remove(). In such cases, the containing vm object is locked across both calls. Consequently, the setting of the vm page's PG_BUSY flag is not even visible to other threads that are following the synchronization protocol. This change (1) eliminates the calls to vm_page_busy() that immediately precede a call to vm_page_remove() or functions, such as vm_page_free() and vm_page_rename(), that call it and (2) relaxes the requirement in vm_page_remove() that the vm page's PG_BUSY flag is set. Now, the vm page's PG_BUSY flag is set only when the vm object lock is released while the vm page is still in transition. Typically, this is when it is undergoing I/O.		2004-11-03 20:17:31 +00:00
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central	- Introduce an ofw_bus kobj-interface for retrieving the OFW node and a	2004-08-12 17:41:33 +00:00
compile
conf	Reduce annoying SCSI probing delay from 15 to 5 seconds in all GENRIC kernels.	2004-11-02 20:57:20 +00:00
creator
ebus	Device driver for onboard CS4231 audio controller which is found	2004-10-25 10:29:57 +00:00
fhc	- Introduce an ofw_bus kobj-interface for retrieving the OFW node and a	2004-08-12 17:41:33 +00:00
include	We seem to have occasions where sending an IPI takes significantly	2004-09-29 21:39:36 +00:00
isa	Device driver for onboard CS4231 audio controller which is found	2004-10-25 10:29:57 +00:00
pci	Correct some uses of the wrong members of the *min()/*max()-familiy, e.g.	2004-08-15 21:37:52 +00:00
sbus	- Introduce an ofw_bus kobj-interface for retrieving the OFW node and a	2004-08-12 17:41:33 +00:00
sparc64	The synchronization provided by vm object locking has eliminated the	2004-11-03 20:17:31 +00:00