2008-03-05 12:00:44

by Martin Schwidefsky

[permalink] [raw]
Subject: [patch 06/10] sclp_vt220: speed up console output for interactive work

From: Christian Borntraeger <[email protected]>

Currently an output buffer can wait up to HZ/2 until the buffer is
flushed. The wait time is noticeable in interactive tools like mc.

Change the value to HZ/20, which seems enough for interactive work.

Signed-off-by: Christian Borntraeger <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
---

drivers/s390/char/sclp_vt220.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Index: quilt-2.6/drivers/s390/char/sclp_vt220.c
===================================================================
--- quilt-2.6.orig/drivers/s390/char/sclp_vt220.c
+++ quilt-2.6/drivers/s390/char/sclp_vt220.c
@@ -367,7 +367,7 @@ sclp_vt220_timeout(unsigned long data)
sclp_vt220_emit_current();
}

-#define BUFFER_MAX_DELAY HZ/2
+#define BUFFER_MAX_DELAY HZ/20

/*
* Internal implementation of the write function. Write COUNT bytes of data

--
blue skies,
Martin.

"Reality continues to ruin my life." - Calvin.