Re: [PATCH] blk-settings: round down io_opt to at least 4K

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Christoph,

>> Quite a few SCSI devices report 0xffff to indicate that the optimal
>> transfer length is the same as the maximum transfer length which for
>> low-byte commands is capped at 0xffff. That's where the odd value comes
>> from in some cases.
>
> Hmm, optimal == max is odd,

What they mean to convey is that "device has no constraints". As opposed
to a value of 0 which means "not reported".

-- 
Martin K. Petersen	Oracle Linux Engineering




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