• Roland Dreier's avatar
    x86: Reduce verbosity of "TSC is reliable" message · ea01c0d7
    Roland Dreier authored
    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: default avatarRoland Dreier <rolandd@cisco.com>
    LKML-Reference: <adazl8l2swc.fsf@cisco.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    ea01c0d7
tsc_sync.c 4.48 KB