Re: [PATCH 05/17] nvme-fabrics: Allow user enabling metadata/T10-PI support

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On 4/23/2020 8:54 AM, Christoph Hellwig wrote:
On Thu, Apr 23, 2020 at 01:39:26AM +0300, Max Gurtovoy wrote:
it's a bit late for me now so I probably wrote non standard sentence above.

BUT what I meant to say is I would like to give the user an option to
decide whether use E2E protection or not (of course a controller can
control protected and non-protected namespaces :) )
I don't really have a problem with an opt-out, but I'd like to apply it
consistently over all transports.

AFAIK, there is no option to format a ns in NVMf (at least for RDMA there
is only 1 lbaf exposed by the target) so i'm not sure how exactly this will
work.
The NVMe protocol Format NVM support is independent of the transport.

Ok, but it's not supported in Linux.

Are you saying we should implement Format NVM for fabrics ? or stay consistent for NVMf (and not nvmf + pci) ?




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