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| author | Kent Overstreet <kmo@daterainc.com> | 2013-07-12 09:39:53 +0400 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2014-01-09 01:05:09 +0400 |
| commit | c78afc6261b09f74abff8c0719b80692a4959768 (patch) | |
| tree | 4b3d5e421fad23e3bd0866a0b18c845acf297506 /block/blk-settings.c | |
| parent | 5f5837d2d650db25b9153b91535e67a96b265f58 (diff) | |
| download | linux-c78afc6261b09f74abff8c0719b80692a4959768.tar.xz | |
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 'block/blk-settings.c')
| -rw-r--r-- | block/blk-settings.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index 05e826793e4e..5d21239bc859 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -592,6 +592,10 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, ret = -1; } + t->raid_partial_stripes_expensive = + max(t->raid_partial_stripes_expensive, + b->raid_partial_stripes_expensive); + /* Find lowest common alignment_offset */ t->alignment_offset = lcm(t->alignment_offset, alignment) & (max(t->physical_block_size, t->io_min) - 1); |