Hi, Peter,
CC the list.
On Tue, 2023-03-28 at 22:37 +0200, Peter Ganzhorn wrote:
> Dear Mr. Rui,
> Dear Mr. Roeck,
>
> please consider accepting the attached patches or
> modifying the coretemp code to stop spamming my syslog.
> I would appreciate it very much if you can accept the patches.
>
> coretemp: Improve dynamic changes of TjMax
> After introduction of dynamic TjMax changes in commit
> c0c67f8761cec1fe36c21d85b1a5400ea7ac30cd
> my syslog gets spammed with "TjMax is ... degrees C"
> messages.
> If TjMax is subject to change at any time, it won't be
> set in tdata anymore and re-read every time from MSR.
> This causes quite a lot of dev_dbg() messages to be issued.
>
> The following patches change the code to read TjMax
> from the MSRs into tdata->tjmax (again) but allow for a
> dynamic update at any time as well. (Patches 1 and 2)
> This way a message will only be issued after actual changes.
> Also I replaced the dev_dbg() with dev_notice (Patch 3) and
> added a additional dev_notice for the case where TjMax is
> set based on assumptions. (Patch 4)
>
>
> If you do not want to accept my patches, removing the
> dev_dbg() in get_tjmax() would be the most simple
> solution I guess.
>
Please check if below patch solves your problem or not.
>From 9370ee5163a85f65230b5222f1f4dece59ce078a Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@xxxxxxxxx>
Date: Wed, 29 Mar 2023 11:35:18 +0800
Subject: [PATCH] hwmon: (coretemp) Avoid duplicate debug messages
Avoid duplicate dev_dbg messages when tjmax value retrieved from MSR
does not change.
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
---
drivers/hwmon/coretemp.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 30d77f451937..809456967b50 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -267,6 +267,7 @@ static int get_tjmax(struct temp_data *tdata, struct device *dev)
int err;
u32 eax, edx;
u32 val;
+ static u32 tjmax;
/* use static tjmax once it is set */
if (tdata->tjmax)
@@ -287,7 +288,10 @@ static int get_tjmax(struct temp_data *tdata, struct device *dev)
* will be used
*/
if (val) {
- dev_dbg(dev, "TjMax is %d degrees C\n", val);
+ if (tjmax != val) {
+ dev_dbg(dev, "TjMax is %d degrees C\n", val);
+ tjmax = val;
+ }
return val * 1000;
}
}
--
2.25.1
