Re: [PATCH 4/4] brd: implement secure erase and write zeroes

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On Fri, Sep 16, 2022 at 05:00:46AM -0400, Mikulas Patocka wrote:
> This patch implements REQ_OP_SECURE_ERASE and REQ_OP_WRITE_ZEROES on brd.
> Write zeroes will free the pages just like discard, but the difference is
> that it writes zeroes to the preceding and following page if the range is
> not aligned on page boundary. Secure erase is just like write zeroes,
> except that it clears the page content before freeing the page.

What is the use case of this?  And just a single overwrite is not what
storage standards would consider a secure erase, but then again we
don't really have any documentation or standards for the Linux OP,
which strongly suggests not actually implementing it for now.

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