Messages in this thread | | | Date | Fri, 24 Oct 2008 13:14:50 +0530 | From | "Nikanth K" <> | Subject | Re: [dm-devel] [PATCH 10/13] dm: add core functions for request-based dm |
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On Fri, Sep 12, 2008 at 8:16 PM, Kiyoshi Ueda <k-ueda@ct.jp.nec.com> wrote: <snip>
> +static int dm_make_request(struct request_queue *q, struct bio *bio) > +{ > + struct mapped_device *md = (struct mapped_device *)q->queuedata; > + > + if (unlikely(bio_barrier(bio))) { > + bio_endio(bio, -EOPNOTSUPP); > + return 0; > + } > + <snip>
Why not add barrier support in the beginning itself, so that targets can be developed with barriers in mind? At least can we make the target to return error, instead of the core?
Thanks Nikanth Karthikesan
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