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| author | Theodore Ts'o <tytso@mit.edu> | 2009-02-28 19:39:58 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-02-28 19:39:58 -0500 |
| commit | afc32f7ee9febc020c73da61402351d4c90437f3 (patch) | |
| tree | 7b78aaaac87eb704074f6ece996b2c78a69fbe18 /fs/ext4/ext4.h | |
| parent | d6014301b5599fba395c42a1e96a7fe86f7d0b2d (diff) | |
| download | linux-afc32f7ee9febc020c73da61402351d4c90437f3.tar.gz | |
ext4: Track lifetime disk writes
Add a new superblock value which tracks the lifetime amount of writes to the filesystem. This is useful in estimating the amount of wear on solid state drives (SSD's) caused by writes to the filesystem. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 1b0c17364631..0bd39188531c 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -683,7 +683,8 @@ struct ext4_super_block { __u8 s_log_groups_per_flex; /* FLEX_BG group size */ __u8 s_reserved_char_pad2; __le16 s_reserved_pad; - __u32 s_reserved[162]; /* Padding to the end of the block */ + __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ + __u32 s_reserved[160]; /* Padding to the end of the block */ }; #ifdef __KERNEL__ |