Re: [RFC][PATCH 0/5] Signal scalability series

Oleg Nesterov
2011-10-04T17:56:38Z

On 10/04, Oleg Nesterov wrote:
>
> On 10/03, Peter Zijlstra wrote:
> >
> > Right, so the thing Thomas and I have been promoting for a while now is
> > to update a signal target vector on every signal mask update. Mask
> > updates should be the slow path. This would leave us with a ready target
> > in O(1).
>
> Yes. This is the "obvious" solution ;) Now that we have
> set_current_blocked() this is simple. Except, of course, this blows
> signal_struct and set_current_blocked() can't rely on TIF_SIGPENDING.
> But we can probably add TIF_YOU_ARE_LISTED_IN_CURR_TARGET_ARRAY.

Forgot to mention... Unblocking becomes "nontrivial" too. But almost
all these changes are local to set_current_blocked().

Oleg.