On 03/24/2015 04:26 PM, Jens Axboe wrote:
The top bits of bio->bi_flags are reserved for keeping the
allocation pool, set aside the next four bits for carrying
a stream ID. That leaves us with support for 15 streams,
0 is reserved as a "stream not set" value.
15 streams seem very limited. Can this be extended? e.g. 16 bits.
15 streams is enough for 1-4 applications. More, and applications starts
to fight over the same stream id's, leading them to place different age
data in same flash blocks and push us back to square one.
I understand that Samsung multi-stream SSD supports a limited amount of
streams, more advance implementations should provide higher limits.
Thanks,
Matias
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