block: Fix page_is_mergeable() for compound pages
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. Fixes: 52d52d1c ("block: only allow contiguous page structs in a bio_vec") Signed-off-by:Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by:
Ming Lei <ming.lei@redhat.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
af822aa6
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