Re: [PATCHv10 9/9] scsi: set permanent stream count in block limits

On Tue, Oct 29, 2024 at 10:18:31AM -0700, Bart Van Assche wrote:

On 10/29/24 8:26 AM, Christoph Hellwig wrote:

quoted

Bart, btw: I think the current sd implementation is buggy as well, as
it assumes the permanent streams are ordered by their data temperature
in the IO Advise hints mode page, but I can't find anything in the
spec that requires a particular ordering.

How about modifying sd_read_io_hints() such that permanent stream
information is ignored if the order of the RELATIVE LIFETIME information
reported by the GET STREAM STATUS command does not match the permanent
stream order?

That seems odd as there is nothing implying that they should be ordered.
The logic thing to do would be to a little array mapping the linux
temperature levels to the streams ids.