Re: [md PATCH 17/34] md/raid5: unite handle_stripe_dirtying5 and handle_stripe_dirtying6

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NeilBrown <neilb@xxxxxxx> writes:

> RAID6 is only allowed to choose 'reconstruct-write' while RAID5 is
> also allow 'read-modify-write'
> Apart from this difference, handle_stripe_dirtying[56] are nearly
> identical.  So resolve these differences and create just one function.
>
> Signed-off-by: NeilBrown <neilb@xxxxxxx>

Reviewed-by: Namhyung Kim <namhyung@xxxxxxxxx>

BTW, here is a question:
  Why RAID6 doesn't allow the read-modify-write? I don't think it is
  not possible, so what prevents doing that? performance? complexity?
  or it's not possible? Why? :)
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