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| author | Ming Lei <ming.lei@redhat.com> | 2019-03-17 18:01:04 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-04-01 12:11:17 -0600 |
| commit | db5ebd6edd2627d7e81a031643cf43587f63e66c (patch) | |
| tree | fdd26a5eb5d832877fcf432eded227becf68b896 | |
| parent | 0383ad4374f7ad7edd925a2ee4753035c3f5508a (diff) | |
| download | linux-db5ebd6edd2627d7e81a031643cf43587f63e66c.tar.gz linux-db5ebd6edd2627d7e81a031643cf43587f63e66c.tar.bz2 linux-db5ebd6edd2627d7e81a031643cf43587f63e66c.zip | |
block: avoid to break XEN by multi-page bvec
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@oracle.com>
Cc: xen-devel@lists.xenproject.org
Cc: Omar Sandoval <osandov@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/bio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c index b64cedc7f87c..b2423e7aae08 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; |