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authorNeilBrown <neilb@suse.com>2017-04-05 14:05:51 +1000
committerShaohua Li <shli@fb.com>2017-04-11 10:13:02 -0700
commitfc9977dd069e4f82fcacb262652117c488647319 (patch)
tree329ec8a20b630d9f3cfdf2596dfe71ea71368c41 /drivers/md/raid10.h
parent673ca68d93879b9ffbbed874c9e70ca6e37cab15 (diff)
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md/raid10: simplify the splitting of requests.
raid10 splits requests in two different ways for two different reasons. First, bio_split() is used to ensure the bio fits with a chunk. Second, multiple r10bio structures are allocated to represent the different sections that need to go to different devices, to avoid known bad blocks. This can be simplified to just use bio_split() once, and not to use multiple r10bios. We delay the split until we know a maximum bio size that can be handled with a single r10bio, and then split the bio and queue the remainder for later handling. As with raid1, we allocate a new bio_set to help with the splitting. It is not correct to use fs_bio_set in a device driver. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid10.h')
-rw-r--r--drivers/md/raid10.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/raid10.h b/drivers/md/raid10.h
index 3162615e57bd..735ce1a3d260 100644
--- a/drivers/md/raid10.h
+++ b/drivers/md/raid10.h
@@ -82,6 +82,7 @@ struct r10conf {
mempool_t *r10bio_pool;
mempool_t *r10buf_pool;
struct page *tmppage;
+ struct bio_set *bio_split;
/* When taking over an array from a different personality, we store
* the new thread here until we fully activate the array.