From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Fri, 6 Dec 2013 04:03:35 +0000 (+0100)
Subject: libthread: avoid calling thread waiting for fork/execed process to finish if we dont... 
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=6e1c833585a78e534a0b4a7c990faba7d4dcdd45;p=plan9front.git

libthread: avoid calling thread waiting for fork/execed process to finish if we dont have to

we do not need to wait for fork/execed program to finish when
not collecting waitmsg. this reduces the number of rio
processes hanging arround for each window shell just waiting
for it to terminate and then dumping the waitmsg.
---

diff --git a/sys/src/libthread/main.c b/sys/src/libthread/main.c
index 1dcd9c319..03c069c14 100644
--- a/sys/src/libthread/main.c
+++ b/sys/src/libthread/main.c
@@ -121,9 +121,10 @@ efork(Execargs *e)
 int
 _schedexec(Execargs *e)
 {
-	int pid;
+	int pid, flag;
 
-	switch(pid = rfork(RFREND|RFNOTEG|RFFDG|RFMEM|RFPROC)){
+	flag = (_threadwaitchan == nil) ? RFNOWAIT : 0;
+	switch(pid = rfork(RFREND|RFNOTEG|RFFDG|RFMEM|RFPROC|flag)){
 	case 0:
 		efork(e);
 	default: