Re: Soft lockup issue in Linux 4.1.9

On Fri, 2 Oct 2015, Eric Dumazet wrote:

On Fri, 2015-10-02 at 22:04 +0200, Thomas Gleixner wrote:

quoted

What makes sure, that the timer cannot be readded while that timer
callback is running?

What is exactly your question ?

CPU0   	  	       		CPU1

timer expires
  callback
				add timer
  timer_pending() == true
  ===> del_timer_sync()

I was just curious how this is prevented as I got lost in the
networking code as usual :)

Thanks,

	tglx