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| author | Christoph Hellwig <hch@lst.de> | 2009-11-21 20:28:52 +0900 |
|---|---|---|
| committer | OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> | 2009-11-21 20:36:52 +0900 |
| commit | 681142f9211b23e6aa2984259d38b76d7bdc05a8 (patch) | |
| tree | cad526094c576b74eb12b0cdb1b497bbb4765128 /fs/fat/fat.h | |
| parent | a8a8a669ea13d792296737505adc43ccacf3a648 (diff) | |
| download | linux-681142f9211b23e6aa2984259d38b76d7bdc05a8.tar.gz linux-681142f9211b23e6aa2984259d38b76d7bdc05a8.tar.bz2 linux-681142f9211b23e6aa2984259d38b76d7bdc05a8.zip | |
fat: make discard a mount option
Currently shipping discard capable SSDs and arrays have rather sub-optimal
implementations of the command and can the use of it can cause massive
slowdowns. Make issueing these commands option as it's already in btrfs
and gfs2.
Signed-off-by: Christoph Hellwig <hch@lst.de>
[hirofumi@mail.parknet.co.jp: tweaks, and add "discard" to fat_show_options]
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Diffstat (limited to 'fs/fat/fat.h')
| -rw-r--r-- | fs/fat/fat.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/fat/fat.h b/fs/fat/fat.h index 7db0979c6b72..e6efdfa0f6db 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -44,7 +44,8 @@ struct fat_mount_options { nocase:1, /* Does this need case conversion? 0=need case conversion*/ usefree:1, /* Use free_clusters for FAT32 */ tz_utc:1, /* Filesystem timestamps are in UTC */ - rodir:1; /* allow ATTR_RO for directory */ + rodir:1, /* allow ATTR_RO for directory */ + discard:1; /* Issue discard requests on deletions */ }; #define FAT_HASH_BITS 8 |