Messages in this thread | | | Date | Sat, 1 Nov 2003 20:45:47 -0800 | From | "David S. Miller" <> | Subject | Re: [BLOCK] phys_contig implies hw_contig |
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On Sat, 1 Nov 2003 13:31:27 +1100 Herbert Xu <herbert@gondor.apana.org.au> 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 arise.
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