From e8e1e613ed999f05f90207b23c33044a2a8f9421 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 2 Nov 1993 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1993-11-02

---
 port/devmnt.c | 6 ++++--
 port/qio.c    | 6 +++---
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/port/devmnt.c b/port/devmnt.c
index dddf3ce22e30c3e3d49b3122fc63dd99e9418354..71ebb4597cf39185d81103bd5506aed158a14fa7 100644
--- a/port/devmnt.c
+++ b/port/devmnt.c
@@ -505,9 +505,11 @@ mntread(Chan *c, void *buf, long n, ulong offset)
 	if(cached) {
 		nc = cread(c, buf, n, offset);
 		if(nc > 0) {
+			n -= nc;
+			if(n == 0)
+				return nc;
 			buf = (uchar*)buf+nc;
 			offset += nc;
-			n -= nc;
 		}
 	}
 
@@ -570,7 +572,7 @@ mntrdwr(int type, Chan *c, void *buf, long n, ulong offset)
 		uba += nr;
 		cnt += nr;
 		n -= nr;
-		if(nr != r->request.count || n == 0)
+		if(nr != r->request.count || n == 0 || up->nnote)
 			break;
 	}
 	return cnt;
diff --git a/port/qio.c b/port/qio.c
index 862758e5b8436c9bde660bcd006bb14e15c2e27c..ffd92f3c08ff52c13a4738e1460e7d63908446d4 100644
--- a/port/qio.c
+++ b/port/qio.c
@@ -154,9 +154,9 @@ iallockproc(void *arg)
 			 *  increase goal if we've been drained.
 			 */
 			if(cl->have == 0){
-				i = cl->goal>>2;
+				i = cl->goal>>1;
 				if(cl->wanted > i)
-					cl->goal += cl->wanted;
+					cl->goal += 2*cl->wanted;
 				else
 					cl->goal += i;
 				cl->wanted = 0;
@@ -195,7 +195,7 @@ iallocinit(void)
 
 	for(pow = Minpow; pow <= Maxpow; pow++){
 		cl = &arena.alloc[pow];
-		cl->goal = Maxpow-pow + 4;
+		cl->goal = Maxpow-pow + 16;
 	}
 
 	/* start garbage collector */