linux-kernel - Re: [PATCH] block: Fix page_is_mergeable() for compound pages

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Message-ID: <79eec1be-c01f-e4d0-20c8-b4c31da97e5b@kernel.dk>
Date:   Mon, 17 Aug 2020 19:36:15 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>, Ming Lei <ming.lei@...hat.com>
Subject: Re: [PATCH] block: Fix page_is_mergeable() for compound pages

On 8/17/20 12:52 PM, Matthew Wilcox (Oracle) wrote:
> If we pass in an offset which is larger than PAGE_SIZE, then
> page_is_mergeable() thinks it's not mergeable with the previous bio_vec,
> leading to a large number of bio_vecs being used.  Use a slightly more
> obvious test that the two pages are compatible with each other.

Applied, thanks.

-- 
Jens Axboe