Re: [PATCH 1/9] percpu-refcount: introduce percpu_ref_is_dead()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello, Ming.

> +/**
> + * percpu_ref_is_dead - test whether a percpu refcount is killed
> + * @ref: percpu_ref to test
> + *
> + * Returns %true if @ref is dead
> + *
> + * This function is safe to call as long as @ref is between init and exit.
> + */
> +static inline bool percpu_ref_is_dead(struct percpu_ref *ref)
> +{
> +	unsigned long __percpu *percpu_count;
> +
> +	if (__ref_is_percpu(ref, &percpu_count))
> +		return false;
> +	return ref->percpu_count_ptr & __PERCPU_REF_DEAD;
> +}

Can you please explain why percpu_ref_is_dying() isn't enough for your
use case?

Thanks.

-- 
tejun



[Index of Archives]     [Linux RAID]     [Linux SCSI]     [Linux ATA RAID]     [IDE]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Device Mapper]

  Powered by Linux