Re: [PATCH v2] block: make sure big bio is splitted into at most 256 bvecs

[Ming Lei]

On Thu, Aug 11, 2016 at 10:02 PM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> Please just fix bcache to not submit bios larger than BIO_MAX_PAGES for
> now, until we can support such callers in general and enable common
> used code to do so.

IMO it can't be efficient to do that in bcache because it need to figure out
how many bvecs one bio includes.

This patch(block: make sure big bio is splitted into at most 256 bvecs)
can support such callers.

Also this kind of usage does simplify drivers.

Thanks,
Ming

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