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| author | Kent Overstreet | 2013-07-12 07:39:53 +0200 |
|---|---|---|
| committer | Kent Overstreet | 2014-01-08 22:05:09 +0100 |
| commit | c78afc6261b09f74abff8c0719b80692a4959768 (patch) | |
| tree | 4b3d5e421fad23e3bd0866a0b18c845acf297506 /drivers/md/bcache | |
| parent | bcache: Do bkey_put() in btree_split() error path (diff) | |
| download | kernel-qcow2-linux-c78afc6261b09f74abff8c0719b80692a4959768.tar.gz kernel-qcow2-linux-c78afc6261b09f74abff8c0719b80692a4959768.tar.xz kernel-qcow2-linux-c78afc6261b09f74abff8c0719b80692a4959768.zip | |
bcache/md: Use raid stripe size
Now that we've got code for raid5/6 stripe awareness, bcache just needs
to know about the stripes and when writing partial stripes is expensive
- we probably don't want to enable this optimization for raid1 or 10,
even though they have stripes. So add a flag to queue_limits.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Diffstat (limited to 'drivers/md/bcache')
| -rw-r--r-- | drivers/md/bcache/super.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 63ebef78df4a..e363efcf2b76 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1134,6 +1134,12 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size) hlist_add_head(&io->hash, dc->io_hash + RECENT_IO); } + dc->disk.stripe_size = q->limits.io_opt >> 9; + + if (dc->disk.stripe_size) + dc->partial_stripes_expensive = + q->limits.raid_partial_stripes_expensive; + ret = bcache_device_init(&dc->disk, block_size, dc->bdev->bd_part->nr_sects - dc->sb.data_offset); if (ret) |