Re: [RFC PATCH v2] support ioctl for tunable user request

[Christoph Hellwig]

On Mon, Sep 05, 2011 at 08:47:58PM +0900, Kyungmin Park wrote:
> The concept is similar with DISCARD request except no-wait for request complete
> 
>  #define REQ_DISCARD            (1 << __REQ_DISCARD)
> +#define REQ_TUNE               (1 << __REQ_TUNE)
> 
> As it's hard to detect the idle time at device level, user send the
> tune request to device when idle.

But what does a "tune" request actually do?  It's an overly generic
term, but I still can't even think of what it would do to a storage
device, nor why it would be a generic block layer concept.

> 
> Thank you,
> Kyungmin Park
---end quoted text---
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