Messages in this thread Patch in this message | | | From | Roland Dreier <> | Subject | [PATCH 1/2] x86: Reduce verbosity of "TSC is reliable" message | Date | Wed, 23 Sep 2009 15:33:23 -0700 |
| |
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> --- 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; }
| |