Re: /proc/sys/kernel/pid_max issues

[Anton Blanchard]

> /*
>  * 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....

Yuck, 64k waiters is asking for trouble. BTW x86-64 mentions it can only
handle 32k writers, that probably wants looking at.

Anton
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