Re: [PATCH 13/14] target/rd: Add DIF protection into rd_execute_rw

[Sagi Grimberg]

<SNIP>

> > I wander how we can skip  sbc_dif_verify_xxxx if the transport already
> > offloaded DIF verify.
> > I think that the transport should signal the core layer that it is able
> > to offload DIF (ADD/STRIP/PASS/VERIFY), in which case the core should
> > turn off the backstore DIF verify emulation to sustain performance.
> So IBLOCK + PSCSI backends will need to be a non interleaved protection
> PASS for fast path operation, and backend protection emulation is
> reserved for RAMDISK and perhaps a special FILEIO full emulation mode.

But can't we avoid that if transport already verified? This will kill 
performance.

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