shithub: patch

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page-rice: fix lru usage

--- a/page-rice

+++ b/page-rice

@@ -1,25 +1,39 @@

-diff 6e64d30454f71ecda88dba1bd792e97509115d73 uncommitted

+diff 6f9838a6a5b80e0253bdc8fb194ad6f15eb655f5 uncommitted

 --- a//sys/src/cmd/page.c

 +++ b//sys/src/cmd/page.c

-@@ -951,7 +951,8 @@

+@@ -898,10 +898,6 @@

+ {

+ 	int fd;

+ 

+-	qlock(&lru);

+-	llinkhead(p);

+-	qunlock(&lru);

+-

+ 	if(p->open != nil && p->image == nil){

+ 		fd = openpage(p);

+ 		if(fd >= 0){

+@@ -951,7 +947,11 @@

  loadpages(Page *p, int oviewgen)

  {

  	while(p != nil && viewgen == oviewgen){

 -		qlock(p);

++		qlock(&lru);

++		llinkhead(p);

++		qunlock(&lru);

 +		if(!canqlock(p))

 +			goto next;

  		loadpage(p);

  		if(viewgen != oviewgen){

  			unloadpage(p);

-@@ -974,6 +975,7 @@

+@@ -972,6 +972,7 @@

+ 			unlockdisplay(display);

+ 		}

  		qunlock(p);

++	next:

  		if(p != current && imemsize >= imemlimit)

  			break;		/* only one page ahead once we reach the limit */

-+	next:

  		if(forward < 0){

- 			if(p->up == nil || p->up->down == p)

- 				break;

-@@ -1309,16 +1311,17 @@

+@@ -1309,16 +1310,17 @@

  	writeaddr(p, "/dev/label");

  	current = p;

  	oviewgen = viewgen;

@@ -40,12 +54,12 @@

  }

  /* recursive display lock, called from main proc only */

-@@ -1693,6 +1696,8 @@

+@@ -1691,6 +1693,8 @@

+ 		addpage(root, "stdin", popenfile, strdup("/fd/0"), -1);

+ 	for(; *argv; argv++)

  		addpage(root, *argv, popenfile, strdup(*argv), -1);

++	for(i=0; i<NPROC-1; i++)	/* rice */

++		showpage1(current);

  	drawlock(1);

-+	for(i=0; i<NPROC; i++)		/* rice */

-+		showpage(current);

  	for(;;){

- 		drawlock(0);

- 		i=event(&e);