> +struct bio *bio_clone_slow_mddev_partial(struct bio *bio, gfp_t gfp_mask,
> + struct mddev *mddev, int offset,
> + int size)
> +{
> + struct bio_set *bs;
> +
> + if (!mddev || !mddev->bio_set)
> + bs =
In raid1/raid10, most users of bio_clone_mddev() need bio_trim() too,
that means only part of the bio is required to be cloned, and not
necessary to clone the whole bio each time, and it is just enough
to clone the specified bvecs range.
So this patch introduces bio_clone_slow_mddev_partial() to i
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