Re: [PATCH] blk-merge: fix blk_recount_segments

Jens Axboe
2014-09-02T16:24:23Z

On 09/02/2014 10:21 AM, Christoph Hellwig wrote:
> Btw, one thing we should reconsider is where we set
> QUEUE_FLAG_NO_SG_MERGE. At least for virtio-blk it seems to me that
> doing the S/G merge should be a lot cheaper than fanning out into the
> indirect descriptors.

And we might consider flipping the default, as most would probably like
to have the sg merging on.

--
Jens Axboe