K 10
svn:author
V 8
hselasky
K 8
svn:date
V 27
2017-11-29T23:28:40.458854Z
K 7
svn:log
V 876
The sched_add() function is not only used when the thread is initially
started, but also by the turnstiles to mark a thread as runnable for
all locks, for instance sleepqueues do:
setrunnable()->sched_wakeup()->sched_add()

In r326218 code was added to allow booting from non-zero CPU numbers
by setting the ts_cpu field inside the ULE scheduler's sched_add()
function. This had an undesired side-effect that prior sched_pin() and
sched_bind() calls got disregarded. This patch fixes the
initialization of the ts_cpu field for the ULE scheduler to only
happen once when the initial thread is constructed during system
init. Forking will then later on ensure that a valid ts_cpu value gets
copied to all children.

Reviewed by:	jhb, kib
Discussed with:	nwhitehorn
MFC after:	1 month
Differential revision:	https://reviews.freebsd.org/D13298
Sponsored by:	Mellanox Technologies

END