Mark Lord wrote:
Tejun Heo wrote:
Anyways, this has never been guaranteed because
the limit is host wide.
But until very very recently, "host wide" meant just a single device
for libata. I was just assuming we did all of the fiddling to ensure
a minimal value there for some real reason.
But, yes, now we have PATA (2 drives per host), and PMP (many more
drives per host), so just maxing out the limit seems sensible.
No, we can't just assume that all host controller CDB FIFOs (if indeed
that's the implementation) support 16-byte CDBs.
Gotta do a controller-by-controller check.
There are both /host/ and /device/ limits.
Jeff
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