Re: [BLOCK] phys_contig implies hw_contig

From: David S. Miller
Date: Sat Nov 01 2003 - 23:47:12 EST

On Sat, 1 Nov 2003 13:31:27 +1100
Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:

> In ll_merge_requests_fn, it is checking blk_hw_contig_segments even if
> blk_phys_contig_segments succeeds. This means that it may cause two
> physically contiguous segments to be separated because the hw check
> fails.

Your analysis assumes that phys contig implies hw contig, I
believe it does not. There may be limitations in the VMERGE
mechanism a platform implements that causes this situation to

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