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| author | Mike Snitzer <snitzer@redhat.com> | 2014-07-14 15:37:18 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2014-08-01 12:30:33 -0400 |
| commit | 895b47d7989af3aacea16380b190b1bb8f046362 (patch) | |
| tree | ff1fa6f0a86063b69d09a76acc6d996face2acdc /drivers/md/dm-cache-metadata.h | |
| parent | 304affaa88328fe8f40ff14f5e6ccbfad8f121eb (diff) | |
| download | linux-stable-895b47d7989af3aacea16380b190b1bb8f046362.tar.gz linux-stable-895b47d7989af3aacea16380b190b1bb8f046362.tar.bz2 linux-stable-895b47d7989af3aacea16380b190b1bb8f046362.zip | |
dm cache metadata: use dm-space-map-metadata.h defined size limits
Commit 7d48935e cleaned up the persistent-data's space-map-metadata
limits by elevating them to dm-space-map-metadata.h. Update
dm-cache-metadata to use these same limits.
The calculation for DM_CACHE_METADATA_MAX_SECTORS didn't account for the
sizeof the disk_bitmap_header. So the supported maximum metadata size
is a bit smaller (reduced from 33423360 to 33292800 sectors).
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Diffstat (limited to 'drivers/md/dm-cache-metadata.h')
| -rw-r--r-- | drivers/md/dm-cache-metadata.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/md/dm-cache-metadata.h b/drivers/md/dm-cache-metadata.h index cd70a78623a3..7383c90ccdb8 100644 --- a/drivers/md/dm-cache-metadata.h +++ b/drivers/md/dm-cache-metadata.h @@ -9,19 +9,17 @@ #include "dm-cache-block-types.h" #include "dm-cache-policy-internal.h" +#include "persistent-data/dm-space-map-metadata.h" /*----------------------------------------------------------------*/ -#define DM_CACHE_METADATA_BLOCK_SIZE 4096 +#define DM_CACHE_METADATA_BLOCK_SIZE DM_SM_METADATA_BLOCK_SIZE /* FIXME: remove this restriction */ /* * The metadata device is currently limited in size. - * - * We have one block of index, which can hold 255 index entries. Each - * index entry contains allocation info about 16k metadata blocks. */ -#define DM_CACHE_METADATA_MAX_SECTORS (255 * (1 << 14) * (DM_CACHE_METADATA_BLOCK_SIZE / (1 << SECTOR_SHIFT))) +#define DM_CACHE_METADATA_MAX_SECTORS DM_SM_METADATA_MAX_SECTORS /* * A metadata device larger than 16GB triggers a warning. |