• Ingo Molnar's avatar
    tracing: optimize trace_printk() · 7bffc23e
    Ingo Molnar authored
    
    
    Impact: micro-optimization
    
    trace_printk() does this unconditionally:
    
    	trace_printk_fmt = fmt;
    
    Where trace_printk_fmt is an entry into a global array. This is
    very SMP-unfriendly.
    
    So only write it once per bootup.
    
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    LKML-Reference: <1236356510-8381-5-git-send-email-fweisbec@gmail.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    7bffc23e
kernel.h 20.6 KB