Isn't Linus saying that you can use (say) 4 kiB buffer_heads, so you
don't need kiobufs? IIRC, kiobufs are page containers, so a 4 kiB
buffer_head is effectively the same thing.
> If you really don't mind the size of the buffer_head as a sg fragment
> header, then at least I'd like us to be able to submit a pre-built
> chain of bh's all at once without having to go through the remap/merge
> cost for each single bh.
Even if you are limited to feeding one buffer_head at a time, the
merge costs should be somewhat mitigated, since you'll decrease your
calls into the API by a factor of 8 or 16.
But an API extension to allow passing a pre-built chain would be even
Hopefully I haven't missed the point. I've got the flu so I'm not
running on all 4 cylinders :-(
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