2011/10/13 Haozhong Zhang <snowzh8...@gmail.com>: > Hi, > > I'm recently reading the code of sched_ule in freebsd 8.2.0 and have two > questions. > > 1. sched_switch() (in sched_ule.c) invokes cpu_switch() (at line 1852) and > thread_unblock_switch() (at line 1867). These two functions exchange > td->td_lock and mtx. What are the purposes of these exchanges? > > 2. Can the exchange in cpu_switch() (in amd64/amd64/cpu_switch.S, at line > 134) be done before calling cpu_switch()? I mean, does this reorder of > exchange and other operations in cpu_switch() cause side-effects to other > code?
This thread should have the details you need: http://lists.freebsd.org/pipermail/svn-src-all/2010-January/019345.html Attilio -- Peace can only be achieved by understanding - A. Einstein _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
