Re: [PATCH] block: Fix front merge check

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On 07/12/2016 10:23 PM, Damien Le Moal wrote:
For a front merge, the maximum number of sectors of the
request must be checked against the front merge BIO sector,
not the current sector of the request.

Why does this matter? The merging should only happen before we start the request, hence rq pos and first bio should be one and the same.

--
Jens Axboe

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