On Wed, 30 Jul 2003, Andrea Arcangeli wrote:
>
> cpu0 cpu1
> ------------ --------------------
>
> do_setitimer
> it_real_fn
> del_timer_sync add_timer -> crash
would you mind to elaborate the precise race? I cannot see how the above
sequence could crash on current 2.6:
del_timer_sync() takes the base pointer in timer->base and locks it, then
checks whether the timer has this base or not and repeats the sequence if
not. add_timer() locks the current CPU's base, then installs the timer and
sets timer->base. Where's the race?
Ingo
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This archive was generated by hypermail 2b29 : Thu Jul 31 2003 - 22:00:44 EST