3 files changed, 33 insertions(+), 0 deletions(-)

M port/portfns.h
M port/proc.c
M port/swap.c

@@ 107,6 107,7 @@ void		kbdrepeat(int);
 long		keyread(char*, int, long);
 long		keywrite(char*, int);
 void		kickpager(void);
+void		killbig(void);
 int		kprint(char*, ...);
 void		kproc(char*, void(*)(void*), void*);
 void		kprocchild(Proc*, void (*)(void*), void*);

@@ 798,3 798,33 @@ exhausted(char *resource)
 	sprint(buf, "no free %s", resource);
 	error(buf);
 }
+
+void
+killbig(void)
+{
+	int i;
+	Segment *s;
+	ulong l, max;
+	Proc *p, *ep, *kp;
+
+	max = 0;
+	kp = 0;
+	ep = procalloc.arena+conf.nproc;
+	for(p = procalloc.arena; p < ep; p++) {
+		if(p->state == Dead || p->kp)
+			continue;
+		l = 0;
+		for(i=1; i<NSEG; i++){
+			s = p->seg[i];
+			if(s)
+				l += s->top - s->base;
+		}
+		if(l > max) {
+			kp = p;
+			max = l;
+		}
+	}
+	print("%d: %s killed because no swap configured", kp->pid, kp->text);
+	kp->procctl = Proc_exitme;
+	postnote(kp, 1, "killed: proc too big", NExit);
+}

@@ 154,6 154,8 @@ loop:
 		else {
 			if(!cpuserver)
 				freebroken();	/* can use the memory */
+			else
+				killbig();
 
 			/* Emulate the old system if no swap channel */
 			print("no physical memory\n");