Re: [PATCH] dev: use ifindex hash for dev_seq_ops

[Daniel Baluta]

> This assumes device ifindexes are contained in a small range
> [N .. N + X]
>
> I understand this can help some benchmarks, but in real world this wont
> help that much once ifindexes are 'fragmented' (If really this multi
> thousand devices stuff is for real)
>
> Listen, we currently have 256 slots in the hash table.
>
> Can we try to make 'offset' something like  (slot_number<<24) +
> (position in hash chain [slot_number]), instead of (position in devices
> global list)


Eric, we can refine the idea of our first patch [1], where we recorded
the (bucket, offset) pair. Stephen, do you agree with this?


thanks,
Daniel.

[1] http://patchwork.ozlabs.org/patch/118331/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/