Re: [PATCH] scsi: relax PAGE LENGTH check for thin provisioning UNMAP support

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>>>>> "Mike" == Mike Snitzer <snitzer@xxxxxxxxxx> writes:

Mike> Thin Provisioning fields are assumed available in the BLOCK LIMITS
Mike> VPD page if PAGE LENGTH is 0x3c.  The BLOCK LIMITS VPD page may be
Mike> extended over time.  Allow for the possibility that the PAGE
Mike> LENGTH exceeds 0x3c.

SBC3 states that: 

"If the device server supports thin provisioning, then the device server
shall set the PAGE LENGTH field to 3Ch."

That's a "shall".  That's a non-negotiable requirement in standards
speak.  And besides, only half of that mandated page length is currently
spoken for.  So I wonder what motivated your change?  Do you have any
examples of devices with a bigger page length?

-- 
Martin K. Petersen	Oracle Linux Engineering
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