• Steven Rostedt's avatar
    ring-buffer: Move zeroing out excess in page to ring buffer code · 2711ca23
    Steven Rostedt authored
    Currently the trace splice code zeros out the excess bytes in the page before
    sending it off to userspace.
    
    This is to make sure userspace is not getting anything it should not be
    when reading the pages, because the excess data was never initialized
    to zero before writing (for perfomance reasons).
    
    But the splice code has no business in doing this work, it should be
    done by the ring buffer. With the latest changes for recording lost
    events, the splice code gets it wrong anyway.
    
    Move the zeroing out of excess bytes into the ring buffer code.
    Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    2711ca23
ring_buffer.c 101 KB