Re: [PATCH] blk-merge: fix blk_recount_segments

[Jens Axboe]

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

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