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Groups > linux.kernel > #1334200
| From | Ming Lei <ming.lei@canonical.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 2/4] block: check virt boundary in bio_will_gap() |
| Date | 2016-02-15 08:10 +0100 |
| Message-ID | <r2lsf-64X-23@gated-at.bofh.it> (permalink) |
| References | <r2lse-64X-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
In the following patch, the way for figuring out
the last bvec will be changed with a bit cost introduced,
so return immediately if the queue doesn't have virt
boundary limit. Actually most of devices have not
this limit.
Cc: Sagi Grimberg <sagig@dev.mellanox.co.il>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
---
include/linux/blkdev.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4571ef1..b8ff6a3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1388,7 +1388,7 @@ static inline bool bvec_gap_to_prev(struct request_queue *q,
static inline bool bio_will_gap(struct request_queue *q, struct bio *prev,
struct bio *next)
{
- if (!bio_has_data(prev))
+ if (!bio_has_data(prev) || !queue_virt_boundary(q))
return false;
return bvec_gap_to_prev(q, &prev->bi_io_vec[prev->bi_vcnt - 1],
--
1.9.1
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[PATCH 0/4] block: fix bio_will_gap() Ming Lei <ming.lei@canonical.com> - 2016-02-15 08:10 +0100
[PATCH 2/4] block: check virt boundary in bio_will_gap() Ming Lei <ming.lei@canonical.com> - 2016-02-15 08:10 +0100
Re: [PATCH 2/4] block: check virt boundary in bio_will_gap() Sagi Grimberg <sagig@dev.mellanox.co.il> - 2016-02-15 09:30 +0100
Re: [PATCH 2/4] block: check virt boundary in bio_will_gap() Ming Lei <ming.lei@canonical.com> - 2016-02-15 11:30 +0100
Re: [PATCH 2/4] block: check virt boundary in bio_will_gap() Sagi Grimberg <sagig@dev.mellanox.co.il> - 2016-02-15 21:30 +0100
Re: [PATCH 2/4] block: check virt boundary in bio_will_gap() Ming Lei <ming.lei@canonical.com> - 2016-02-16 14:10 +0100
Re: [PATCH 2/4] block: check virt boundary in bio_will_gap() Ming Lei <ming.lei@canonical.com> - 2016-02-16 14:10 +0100
Re: [PATCH 0/4] block: fix bio_will_gap() Sagi Grimberg <sagig@dev.mellanox.co.il> - 2016-02-15 09:40 +0100
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