Re: [dm-devel] [PATCH 2/2] block: defer the use of inline biovecs for discard requests

[Mike Snitzer <snitzer redhat com>]

On Sun, Jun 27 2010 at  5:39am -0400,
Christoph Hellwig <hch lst de> wrote:

> On Sat, Jun 26, 2010 at 03:56:51PM -0400, Mike Snitzer wrote:
> > Don't alloc discard bio with a biovec in blkdev_issue_discard.  Doing so
> > means bio_has_data() will not be true until the SCSI layer adds the
> > payload to the discard request via blk_add_request_payload.
> > 
> > bio_{enable,disable}_inline_vecs are not expected to be widely used so
> > they were exported using EXPORT_SYMBOL_GPL.
> 
> Why do we need them exported at all?

Hmm, good point!

> Also some comments on these functions would be useful.

OK.

> Otherwise it looks good to me.

Thanks, I'll get a v2 of this patch out.