Messages in this thread | | | Date | Sun, 12 Sep 2004 15:41:37 +0200 | From | Ingo Molnar <> | Subject | Re: /proc/sys/kernel/pid_max issues |
| |
* Arjan van de Ven <arjanv@redhat.com> wrote:
> On Sun, Sep 12, 2004 at 10:30:00PM +1000, Anton Blanchard wrote: > > > > Hmm can you point the 16bit counter out? I can create 1 million NPTL > > threads on ppc64 easily, so why not? > > /* > * the semaphore definition > */ > struct rw_semaphore { > /* XXX this should be able to be an atomic_t -- paulus */ > signed int count; > #define RWSEM_UNLOCKED_VALUE 0x00000000 > #define RWSEM_ACTIVE_BIAS 0x00000001 > #define RWSEM_ACTIVE_MASK 0x0000ffff > > that counter is split in 2 16 bit entities....
the generic semaphore code can handle up to ~2^31 waiters. I once tried it on x86, it seems to work fine.
Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |