Re: Prezeroing V3 [4/4]: Driver for hardware zeroing on Altix

[Andi Kleen]

Christoph Lameter <clameter@xxxxxxx> writes:

> +	/* Check limitations.
> +		1. System must be running (weird things happen during bootup)
> +		2. Size >64KB. Smaller requests cause too much bte traffic
> +	 */
> +	if (len >= BTE_MAX_XFER || len < 60000 || system_state != SYSTEM_RUNNING)
> +		return EINVAL;

surely return -EINVAL; 

Also have you thought about doing a similar driver for x86/x86-64 using
cache bypassing stores? 

-Andi
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