From 279afbad4e54acbd61bf88a54a73af3bbfdeb5dd Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Wed, 5 Jun 2013 06:21:07 -0700 Subject: bcache: Track dirty data by stripe To make background writeback aware of raid5/6 stripes, we first need to track the amount of dirty data within each stripe - we do this by breaking up the existing sectors_dirty into per stripe atomic_ts Signed-off-by: Kent Overstreet --- drivers/md/bcache/writeback.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 drivers/md/bcache/writeback.h (limited to 'drivers/md/bcache/writeback.h') diff --git a/drivers/md/bcache/writeback.h b/drivers/md/bcache/writeback.h new file mode 100644 index 000000000000..5ce9771df047 --- /dev/null +++ b/drivers/md/bcache/writeback.h @@ -0,0 +1,21 @@ +#ifndef _BCACHE_WRITEBACK_H +#define _BCACHE_WRITEBACK_H + +static inline uint64_t bcache_dev_sectors_dirty(struct bcache_device *d) +{ + uint64_t i, ret = 0; + + for (i = 0; i < d->nr_stripes; i++) + ret += atomic_read(d->stripe_sectors_dirty + i); + + return ret; +} + +void bcache_dev_sectors_dirty_add(struct cache_set *, unsigned, uint64_t, int); +void bch_writeback_queue(struct cached_dev *); +void bch_writeback_add(struct cached_dev *); + +void bch_sectors_dirty_init(struct cached_dev *dc); +void bch_cached_dev_writeback_init(struct cached_dev *); + +#endif -- cgit v1.2.3