diff options
| author | Helge Deller <deller@gmx.de> | 2023-08-25 18:46:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-23 11:47:01 +0300 |
| commit | b0930dce6c7532fd4053fbd4eda8b7192df70ae1 (patch) | |
| tree | 381eafb2df396f0e7a2ec164afe81deb238b8911 | |
| parent | a1a5142bd847331453c3ecaeb8124bb67afb72e6 (diff) | |
| download | linux-b0930dce6c7532fd4053fbd4eda8b7192df70ae1.tar.xz | |
parisc: led: Reduce CPU overhead for disk & lan LED computation
commit 358ad816e52d4253b38c2f312e6b1cbd89e0dbf7 upstream.
Older PA-RISC machines have LEDs which show the disk- and LAN-activity.
The computation is done in software and takes quite some time, e.g. on a
J6500 this may take up to 60% time of one CPU if the machine is loaded
via network traffic.
Since most people don't care about the LEDs, start with LEDs disabled and
just show a CPU heartbeat LED. The disk and LAN LEDs can be turned on
manually via /proc/pdc/led.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/parisc/led.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/parisc/led.c b/drivers/parisc/led.c index 6c25796fcfa9..acd1dbb6adfb 100644 --- a/drivers/parisc/led.c +++ b/drivers/parisc/led.c @@ -60,8 +60,8 @@ static int led_type __read_mostly = -1; static unsigned char lastleds; /* LED state from most recent update */ static unsigned int led_heartbeat __read_mostly = 1; -static unsigned int led_diskio __read_mostly = 1; -static unsigned int led_lanrxtx __read_mostly = 1; +static unsigned int led_diskio __read_mostly; +static unsigned int led_lanrxtx __read_mostly; static char lcd_text[32] __read_mostly; static char lcd_text_default[32] __read_mostly; static int lcd_no_led_support __read_mostly = 0; /* KittyHawk doesn't support LED on its LCD */ |