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authorDavid Sterba <dsterba@suse.com>2019-05-17 12:43:36 +0300
committerDavid Sterba <dsterba@suse.com>2019-07-01 14:34:57 +0300
commit8c3e3582a4f0dbdaea49cfd71640a626c8bb7134 (patch)
treeb45ec48368abc4aa5122508bc1ec2caaae5f1835 /fs/btrfs/volumes.h
parent946c9256c6fabe8d3fe8e076df1c4290dcd778f2 (diff)
downloadlinux-8c3e3582a4f0dbdaea49cfd71640a626c8bb7134.tar.xz
btrfs: use u8 for raid_array members
The raid_attr table is now 7 * 56 = 392 bytes long, consisting of just small numbers so we don't have to use ints. New size is 7 * 32 = 224, saving 3 cachelines. Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
-rw-r--r--fs/btrfs/volumes.h18
1 files changed, 9 insertions, 9 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 07156d974ac4..73520a6ed90a 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -336,16 +336,16 @@ struct btrfs_device_info {
};
struct btrfs_raid_attr {
- int sub_stripes; /* sub_stripes info for map */
- int dev_stripes; /* stripes per dev */
- int devs_max; /* max devs to use */
- int devs_min; /* min devs needed */
- int tolerated_failures; /* max tolerated fail devs */
- int devs_increment; /* ndevs has to be a multiple of this */
- int ncopies; /* how many copies to data has */
- int nparity; /* number of stripes worth of bytes to store
+ u8 sub_stripes; /* sub_stripes info for map */
+ u8 dev_stripes; /* stripes per dev */
+ u8 devs_max; /* max devs to use */
+ u8 devs_min; /* min devs needed */
+ u8 tolerated_failures; /* max tolerated fail devs */
+ u8 devs_increment; /* ndevs has to be a multiple of this */
+ u8 ncopies; /* how many copies to data has */
+ u8 nparity; /* number of stripes worth of bytes to store
* parity information */
- int mindev_error; /* error code if min devs requisite is unmet */
+ u8 mindev_error; /* error code if min devs requisite is unmet */
const char raid_name[8]; /* name of the raid */
u64 bg_flag; /* block group flag of the raid */
};