pre-empt both user and kernel, in clock interrupt

usertest.c tests pre-emption
kill()

1 files changed, 1 insertions, 0 deletions

diff --git a/proc.h b/proc.h
index b5cf015..86ba0eb 100644
--- a/proc.h
+++ b/proc.h
@@ -41,6 +41,7 @@ struct proc{
   int pid;
   int ppid;
   void *chan; // sleep
+  int killed;
   struct fd *fds[NOFILE];
 
   struct Taskstate ts;  // only to give cpu address of kernel stack