linux-kernel - [PATCH] ACPI: Kill overly verbose "power state" log messages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <adapr9gypqz.fsf@cisco.com>
Date:	Thu, 24 Sep 2009 14:52:36 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Len Brown <lenb@...nel.org>
Cc:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: [PATCH] ACPI: Kill overly verbose "power state" log messages

I was recently lucky enough to get a 64-CPU system.  The processors
actually have T-states, so my kernel log ends up with 64 lines like:

    ACPI: CPU0 (power states: C1[C1] C2[C3])

This is pretty useless clutter because this info is already available
after boot from both /sys/devices/system/cpu/cpu*/cpuidle/state?/ as
well as /proc/acpi/processor/CPU*/power.

So just delete the code that prints the throttling states in
processor_idle.c.

Signed-off-by: Roland Dreier <rolandd@...co.com>
---
 drivers/acpi/processor_idle.c |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index cc61a62..706eacf 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1214,13 +1214,6 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr,
 		acpi_processor_setup_cpuidle(pr);
 		if (cpuidle_register_device(&pr->power.dev))
 			return -EIO;
-
-		printk(KERN_INFO PREFIX "CPU%d (power states:", pr->id);
-		for (i = 1; i <= pr->power.count; i++)
-			if (pr->power.states[i].valid)
-				printk(" C%d[C%d]", i,
-				       pr->power.states[i].type);
-		printk(")\n");
 	}
 #ifdef CONFIG_ACPI_PROCFS
 	/* 'power' [R] */
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/