Alan Cox 7b85f59183 Resurrect pmap_is_referenced() and use it in mincore(). Essentially, ... pmap_ts_referenced() is not always appropriate for checking whether or not pages have been referenced because it clears any reference bits that it encounters. For example, in mincore(), clearing the reference bits has two negative consequences. First, it throws off the activity count calculations performed by the page daemon. Specifically, a page on which mincore() has called pmap_ts_referenced() looks less active to the page daemon than it should. Consequently, the page could be deactivated prematurely by the page daemon. Arguably, this problem could be fixed by having mincore() duplicate the activity count calculation on the page. However, there is a second problem for which that is not a solution. In order to clear a reference on a 4KB page, it may be necessary to demote a 2/4MB page mapping. Thus, a mincore() by one process can have the side effect of demoting a superpage mapping within another process!		2010-04-24 17:32:52 +00:00
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cddl
compile
conf	Change USB_DEBUG to #ifdef and allow it to be turned off. Previously this had	2010-04-22 21:31:34 +00:00
include	Move the constants specifying the size of struct kinfo_proc into	2010-04-24 12:49:52 +00:00
mdesc
sun4v	Resurrect pmap_is_referenced() and use it in mincore(). Essentially,	2010-04-24 17:32:52 +00:00