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rio, kbdfs: increase read buffer for high latency kbdfs support

--- a/sys/src/cmd/aux/kbdfs/kbdfs.c

+++ b/sys/src/cmd/aux/kbdfs/kbdfs.c

@@ -1575,13 +1575,13 @@

 	consreqchan = chancreate(sizeof(Req*), 0);

 	kbdreqchan = chancreate(sizeof(Req*), 0);

-	keychan = chancreate(sizeof(Key), 8);

-	mctlchan = chancreate(sizeof(Key), 8);

+	keychan = chancreate(sizeof(Key), 64);

+	mctlchan = chancreate(sizeof(Key), 64);

 	ctlchan = chancreate(sizeof(int), 0);

 	rawchan = chancreate(sizeof(Rune), 0);

-	runechan = chancreate(sizeof(Rune), 32);

-	conschan = chancreate(sizeof(char*), 16);

-	kbdchan = chancreate(sizeof(char*), 16);

+	runechan = chancreate(sizeof(Rune), 256);

+	conschan = chancreate(sizeof(char*), 128);

+	kbdchan = chancreate(sizeof(char*), 128);

 	intchan = chancreate(sizeof(int), 0);

 	threadpostmountsrv(&fs, sname, mntpt, MBEFORE);

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

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

@@ -1157,7 +1157,7 @@

 		hidden[nhidden++] = w;

 		w->screenr = ZR;

 	}

-	threadcreate(winctl, w, 8192);

+	threadcreate(winctl, w, STACK);

 	if(!hideit)

 		wcurrent(w);

 	if(pid == 0){

@@ -1170,7 +1170,7 @@

 		else

 			arg[3] = argv;

 		arg[4] = dir;

-		proccreate(winshell, arg, 8192);

+		proccreate(winshell, arg, STACK);

 		pid = recvul(cpid);

 		free(arg);

 	}

@@ -1194,7 +1194,7 @@

 kbdproc(void *arg)

 {

 	Channel *c = arg;

-	char buf[128], *p, *e;

+	char buf[1024], *p, *e;

 	int fd, cfd, kfd, n;

 	threadsetname("kbdproc");