From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Wed, 5 Mar 2008 11:37:12 +0000 (+0100)
Subject: [S390] sclp_vt220: speed up console output for interactive work
X-Git-Tag: firefly_0821_release~22095^2~4
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fa331ffc56fb8ead0811a89e4a582bbd5f29d714;p=firefly-linux-kernel-4.4.55.git

[S390] sclp_vt220: speed up console output for interactive work

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 <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index 92f527201792..f7b258dfd52c 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/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