plan9port

commit d4ccb0a943fb312d949726827d4e4e71e6a7a0bb
parent ba3110263311be872f4d1d1e11735d7afee1f61a
Author: Ties Bos <gitbisector@gmail.com>
Date:   Mon, 10 Sep 2012 22:07:26 -0400

9pfuse: fix memory leak, avoid memory explosion

Change is to handle FUSE_FORGET in main loop instead of separate thread for each as 10s of thousands can come in at once.
Fixes issue 104.

R=0intro, rsc
http://codereview.appspot.com/6498081

Diffstat:
M
CONTRIBUTORS
 | 
1
+
M
src/cmd/9pfuse/main.c
 | 
13
+++++++++++--

2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
@@ -35,6 +35,7 @@ Rob Kroeger <robkroeger@gmail.com>
 Rob Pike <robpike@gmail.com>
 Russ Cox <rsc@swtch.com>
 Sean McKean <smckean83@gmail.com>
+Ties Bos <gitbisector@gmail.com>
 Tim Newsham <tim.newsham@gmail.com>
 Tony Lainson <t.lainson@gmail.com>
 Venkatesh Srinivas <extrudedaluminiu@gmail.com>
diff --git a/src/cmd/9pfuse/main.c b/src/cmd/9pfuse/main.c
@@ -257,6 +257,7 @@ allocfh(CFid *fid)
 {
 	return _alloc(fid, 0);
 }
+
 uvlong
 allocnodeid(CFid *fid)
 {
@@ -412,6 +413,7 @@ fuseforget(FuseMsg *m)
 		fprint(2, "bad count in forget\n");
 	ff->ref = 1;
 	freefusefid(ff);
+	freefusemsg(m);
 }
 
 /*
@@ -1255,8 +1257,15 @@ fusedispatch(void *v)
 		fusehandlers[fuselist[i].op] = fuselist[i].fn;
 	}
 
-	while((m = recvp(fusechan)) != nil)
-		threadcreate(fusethread, m, STACK);
+	while((m = recvp(fusechan)) != nil) {
+		switch(m->hdr->opcode) {
+		case FUSE_FORGET:
+		 	fusehandlers[m->hdr->opcode](m);
+			break;
+		default: 
+			threadcreate(fusethread, m, STACK);
+		}
+	}
 }
 
 void*