• Herbert Xu's avatar
    [NET]: Fix packet timestamping. · 325ed823
    Herbert Xu authored
    
    
    I've found the problem in general.  It affects any 64-bit
    architecture.  The problem occurs when you change the system time.
    
    Suppose that when you boot your system clock is forward by a day.
    This gets recorded down in skb_tv_base.  You then wind the clock back
    by a day.  From that point onwards the offset will be negative which
    essentially overflows the 32-bit variables they're stored in.
    
    In fact, why don't we just store the real time stamp in those 32-bit
    variables? After all, we're not going to overflow for quite a while
    yet.
    
    When we do overflow, we'll need a better solution of course.
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    325ed823
skbuff.c 42.3 KB