Re: [patch v2] bio-integrity: use hardware sectors instead of block layer sectors

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>>>>> "Dan" == Dan Carpenter <error27@xxxxxxxxx> writes:

Dan,

This one bitrotted in my mailbox for a while because it conflicted with
something else I was working on and then it slipped through the cracks.
Sorry about that.


Dan> The difference between "sectors" and "nr_sectors" is that "sectors"
Dan> is in terms of 512 byte sectors and "nr_sectors" is in terms of
Dan> hardware sectors.  They are only different for 4k sector devices.

Dan> Also I changed the name because as Jamie Lokier points out, "that
Dan> code is so asking for the variable to be called 'hw_sectors'."

The change is obviously functionally correct.  But I object to the
notion of hw_sectors.  The 1:1 mapping of DIF tuples and logical blocks
is even going away in SBC3.  So let's not perpetuate that.

I have a patch in my queue that gets rid of all the hw_sector references
in the integrity code.  I'll make sure to include your fix.

So thanks for spotting this.  I obviously haven't tested PI drives with
a 4KB logical block size in combination with device mapper...

-- 
Martin K. Petersen	Oracle Linux Engineering
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