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authorChristoph Hellwig <hch@lst.de>2009-11-21 20:28:52 +0900
committerOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>2009-11-21 20:36:52 +0900
commit681142f9211b23e6aa2984259d38b76d7bdc05a8 (patch)
treecad526094c576b74eb12b0cdb1b497bbb4765128 /fs/fat/fat.h
parenta8a8a669ea13d792296737505adc43ccacf3a648 (diff)
downloadlinux-2.6.38-lt-ux500-681142f9211b23e6aa2984259d38b76d7bdc05a8.tar.gz
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.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 7db0979c6b7..e6efdfa0f6d 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