On Monday, February 06, 2012 6:34:06 am Ivan Voras wrote: > On 4 February 2012 17:49, Ryan Stone <rst...@freebsd.org> wrote: > > Author: rstone > > Date: Sat Feb 4 16:49:29 2012 > > New Revision: 230984 > > URL: http://svn.freebsd.org/changeset/base/230984 > > > > Log: > > Whenever a new kernel thread is spawned, explicitly clear any CPU affinity > > set on the new thread. This prevents the thread from inadvertently > > inheriting affinity from a random sibling. > > Shouldn't new threads inherit affinity from the threads which spawned them?
User threads still do, but kernel threads are a bit tricky since most of them get created during boot when everything is running on the BSP, so the affinity they would inherit is rather bogus. Even post-boot many of the cases I can think of when you would create kthreads (e.g. expanding a thread pool), you don't really want to inherit affinity. -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
