shithub: gefs

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main: 'noswap' ourselves

we don't want to get oomkilled, and swapping an fs
to itself seems like a bad idea.

--- a/main.c

+++ b/main.c

@@ -28,6 +28,23 @@

 Blk	*blkbuf;

 void	**errctx;

+static void

+nokill(void)

+{

+	char buf[128];

+	int fd;

+

+	snprint(buf, sizeof(buf), "/proc/%d/ctl", getpid());

+	if((fd = open(buf, OWRITE)) == -1){

+		fprint(2, "nokill: open %s: %r", buf);

+		return;

+	}

+	if(fprint(fd, "noswap\n") == -1){

+		fprint(2, "nokill: write %s: %r", buf);

+		return;

+	}

+}

+

 static uvlong

 memsize(void)

 {

@@ -162,6 +179,7 @@

 	if (pid < 0)

 		sysfatal("can't fork: %r");

 	if (pid == 0) {

+		nokill();

 		id = aincl(&fs->nworker, 1);

 		if((*errctx = mallocz(sizeof(Errctx), 1)) == nil)

 			sysfatal("malloc: %r");

@@ -342,6 +360,7 @@

 	}

 	rfork(RFNOTEG);

+	nokill();

 	loadfs(dev);

 	if(check && !checkfs(2))

 		sysfatal("fishy");