- Relax requirements for p_numthreads, p_threads, p_swtick, and p_nice from

   requiring the per-process spinlock to only requiring the process lock.
 - Reflect these changes in the proc.h documentation and consumers throughout
   the kernel.  This is a substantial reduction in locking cost for these
   fields and was made possible by recent changes to threading support.

1 files changed, 0 insertions, 4 deletions

diff --git a/sys/ufs/ffs/ffs_snapshot.c b/sys/ufs/ffs/ffs_snapshot.c
index ece2ad7..4e11857 100644
--- a/sys/ufs/ffs/ffs_snapshot.c
+++ b/sys/ufs/ffs/ffs_snapshot.c
@@ -393,10 +393,8 @@ restart:
 
 		p = td->td_proc;
 		PROC_LOCK(p);
-		PROC_SLOCK(p);
 		saved_nice = p->p_nice;
 		sched_nice(p, 0);
-		PROC_SUNLOCK(p);
 		PROC_UNLOCK(p);
 	}
 	/*
@@ -816,9 +814,7 @@ out:
 
 		p = td->td_proc;
 		PROC_LOCK(p);
-		PROC_SLOCK(p);
 		sched_nice(td->td_proc, saved_nice);
-		PROC_SUNLOCK(p);
 		PROC_UNLOCK(td->td_proc);
 	}
 	UFS_LOCK(ump);