• Jan Engelhardt's avatar
    [PATCH] printk time parameter · 3b9c0410
    Jan Engelhardt authored
    
    
    Currently, enabling/disabling printk timestamps is only possible through
    reboot (bootparam) or recompile.  I normally do not run with timestamps
    (since syslog handles that in a good manner), but for measuring small
    kernel delays (e.g.  irq probing - see parport thread) I needed subsecond
    precision, but then again, just for some minutes rather than all kernel
    messages to come.  The following patch adds a module_param() with which the
    timestamps can be en-/disabled in a live system through
    /sys/modules/printk/parameters/printk_time.
    Signed-off-by: default avatarJan Engelhardt <jengelh@gmx.de>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    3b9c0410