diff options
Diffstat (limited to 'drivers/md/bcache/writeback.h')
| -rw-r--r-- | drivers/md/bcache/writeback.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/bcache/writeback.h b/drivers/md/bcache/writeback.h index f102b1f9bc51..66f1c527fa24 100644 --- a/drivers/md/bcache/writeback.h +++ b/drivers/md/bcache/writeback.h @@ -8,6 +8,13 @@ #define MAX_WRITEBACKS_IN_PASS 5 #define MAX_WRITESIZE_IN_PASS 5000 /* *512b */ +/* + * 14 (16384ths) is chosen here as something that each backing device + * should be a reasonable fraction of the share, and not to blow up + * until individual backing devices are a petabyte. + */ +#define WRITEBACK_SHARE_SHIFT 14 + static inline uint64_t bcache_dev_sectors_dirty(struct bcache_device *d) { uint64_t i, ret = 0; |