Re: [PATCH v8 1/2] block: ioctl support for sanitize in eMMC 4.5

Arnd Bergmann
2012-07-26T21:45:12Z

On Wednesday 25 July 2012, Yaniv Gardi wrote:
>
> Adding a new ioctl to support sanitize operation in eMMC
> cards version 4.5.
> The sanitize ioctl support helps performing this operation
> via user application.
>
> Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
>

Can you explain how you expect this to be called by a file system?
We've debated this in the past and concluded that we probably
want to do it at the same time as batched discard, but I don't
see if the sanitize request should be sent for each FITRIM
or whether we should better have a separate file system level
ioctl. My feeling is that it would be more useful to call this
feature through a file system level ioctl than through a block
level ioctl, but I guess it makes sense to support both.

Arnd