K 10
svn:author
V 2
bz
K 8
svn:date
V 27
2012-05-19T18:32:31.287933Z
K 7
svn:log
V 602
MFC r231767:

 Fix PAWS (Protect Against Wrapped Sequence numbers) in cases when
 hz >> 1000 and thus getting outside the timestamp clock frequenceny of
 1ms < x < 1s per tick as mandated by RFC1323, leading to connection
 resets on idle connections.

 Always use a granularity of 1ms using getmicrouptime() making all but
 relevant callouts independent of hz.

 Use getmicrouptime(), not getmicrotime() as the latter may make a jump
 possibly breaking TCP nfsroot mounts having our timestamps move forward
 for more than 24.8 days in a second without having been idle for that
 long.

PR:		kern/61404

END