Re: Spinlocks: Factor our GENERIC_LOCKBREAK in order to avoid spinwith irqs disable

[Christoph Lameter]

On Thu, 26 Jun 2008, Petr Tesarik wrote:

> We should probably re-think the whole locking scheme, because spinlocks
> were designed to be held for a short period of time. This was a fair
> assumption when they were introduced, but obviously it is now false in
> many cases (such as virtualization).

And NUMA.

> Ticket-based spinlocks have actually already changed the original
> design, so why not implement a generic "lock scheduler" on top of
> spinlock_t and rwlock_t?

How about making the semaphore / mutex code as fast as spinlocks and just 
use that?

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/