Re: tx_timeout and timer serialisation

[Andrey Savochkin <saw@xxxxxxxxxxxxx>]

On Fri, May 19, 2000 at 10:24:39PM -0700, David S. Miller wrote:
>    Date: Sat, 20 May 2000 15:22:27 +1000
>    From: Andrew Morton <andrewm@xxxxxxxxxx>
> 
>    I have just written a little kernel module which has confirmed that the
>    handler-keeps-running-after-del_timer bug exists in both 2.2.14 and
>    2.3.99-pre9.  Not good.  Very not good, IMO.
> 
> I just noticed this thread, and has del_timer_sync been mentioned yet?
> That is what should be used to make sure the timer is done in 2.3.x,
> unless something else prevents it's usage (locking conflict).

del_timer_sync doesn't ensure that the timer has really exited (as opposite
to just calling timer_exit()).
We cannot free the code segment where the timer handler resides even
with del_timer_sync!

        Andrey