LWN: Comments on "No more 24-bit atomic_t"

No more 24-bit atomic_t

jzbiciak — Sat, 21 Feb 2004 04:09:13 +0000

Spinlocks disable preemption, right?

No more 24-bit atomic_t

ptr — Fri, 20 Feb 2004 20:39:55 +0000

Well, without digging deep, there should not be any (additional) dead locks, since always only up to one of the four locks is used per thread... Additionally, the atomicity dead lock is always the last. If the locking order was robust before, it will be after the change.

No more 24-bit atomic_t

xorbe — Thu, 19 Feb 2004 21:32:31 +0000

"a small array (four entries) of spinlocks"
4 spinlocks for the entire system's atomic variables?
Helloooooooooo deadlock!