On Tue, May 15, 2012 at 05:21:47PM +0000, Andriy Gapon wrote: > Author: avg > Date: Tue May 15 17:21:46 2012 > New Revision: 235480 > URL: http://svn.freebsd.org/changeset/base/235480 > > Log: > MFC r230643: stop_scheduler -> td_stopsched > Modified: stable/9/sys/sys/proc.h > ============================================================================== > --- stable/9/sys/sys/proc.h Tue May 15 17:11:00 2012 (r235479) > +++ stable/9/sys/sys/proc.h Tue May 15 17:21:46 2012 (r235480) > @@ -235,6 +235,7 @@ struct thread { > short td_locks; /* (k) Count of non-spin locks. */ > short td_rw_rlocks; /* (k) Count of rwlock read locks. */ > short td_lk_slocks; /* (k) Count of lockmgr shared locks. */ > + short td_stopsched; /* (k) Scheduler stopped. */ > struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */ > const char *td_lockname; /* (t) Name of lock blocked on. */ > LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */ > Did you verified that there is a gap between td_lk_slocks and td_blocked an all tier-1 architectures large enough to adopt td_stopsched without changing the layout of struct thread after the new member ?
If not, this breaks KBI.
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