Messages in this thread Patch in this message |  | | | Date | Thu, 24 Sep 2009 09:37:29 GMT | | From | tip-bot for Roland Dreier <> | | Subject | [tip:x86/urgent] x86: Reduce verbosity of "TSC is reliable" message |
| |
Commit-ID: ea01c0d7315d6e3218fd22a6947c5b09305fcf65 Gitweb: http://git.kernel.org/tip/ea01c0d7315d6e3218fd22a6947c5b09305fcf65 Author: Roland Dreier <rdreier@cisco.com> AuthorDate: Wed, 23 Sep 2009 15:33:23 -0700 Committer: Ingo Molnar <mingo@elte.hu> CommitDate: Thu, 24 Sep 2009 11:35:19 +0200
x86: Reduce verbosity of "TSC is reliable" message
On modern systems, the kernel prints the message
Skipping synchronization checks as TSC is reliable.
once for every non-boot CPU.
This gets kind of ridiculous on huge systems; for example, on a 64-thread system I was lucky enough to get:
$ dmesg | grep 'TSC is reliable' | wc 63 567 4221 There's no point to doing this for every CPU, since the code is just checking the boot CPU anyway, so change this to a printk_once() to make the message appears only once.
Signed-off-by: Roland Dreier <rolandd@cisco.com> LKML-Reference: <adazl8l2swc.fsf@cisco.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
--- arch/x86/kernel/tsc_sync.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c index 027b5b4..f379309 100644 --- a/arch/x86/kernel/tsc_sync.c +++ b/arch/x86/kernel/tsc_sync.c @@ -114,7 +114,7 @@ void __cpuinit check_tsc_sync_source(int cpu) return; if (boot_cpu_has(X86_FEATURE_TSC_RELIABLE)) { - pr_info("Skipping synchronization checks as TSC is reliable.\n"); + printk_once(KERN_INFO "Skipping synchronization checks as TSC is reliable.\n"); return; }
|  |