[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 5.1 279/405] block: avoid to break XEN by multi-page bvec
[ Upstream commit db5ebd6edd2627d7e81a031643cf43587f63e66c ] XEN has special page merge requirement, see xen_biovec_phys_mergeable(). We can't merge pages into one bvec simply for XEN. So move XEN's specific check on page merge into __bio_try_merge_page(), then abvoid to break XEN by multi-page bvec. Cc: ris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx Cc: Omar Sandoval <osandov@xxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Reviewed-by: Juergen Gross <jgross@xxxxxxxx> Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx> Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- block/bio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/block/bio.c b/block/bio.c index 716510ecd7ffa..a3c80a6c1fe51 100644 --- a/block/bio.c +++ b/block/bio.c @@ -776,6 +776,8 @@ bool __bio_try_merge_page(struct bio *bio, struct page *page, if (vec_end_addr + 1 != page_addr + off) return false; + if (xen_domain() && !xen_biovec_phys_mergeable(bv, page)) + return false; if (same_page && (vec_end_addr & PAGE_MASK) != page_addr) return false; -- 2.20.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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