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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/inode.c | |
| parent | a8a8a669ea13d792296737505adc43ccacf3a648 (diff) | |
| download | op-kernel-dev-681142f9211b23e6aa2984259d38b76d7bdc05a8.zip op-kernel-dev-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/inode.c')
| -rw-r--r-- | fs/fat/inode.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 76b7961..14da530 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -858,6 +858,8 @@ static int fat_show_options(struct seq_file *m, struct vfsmount *mnt) seq_puts(m, ",errors=panic"); else seq_puts(m, ",errors=remount-ro"); + if (opts->discard) + seq_puts(m, ",discard"); return 0; } @@ -871,7 +873,7 @@ enum { Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes, Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes, Opt_obsolate, Opt_flush, Opt_tz_utc, Opt_rodir, Opt_err_cont, - Opt_err_panic, Opt_err_ro, Opt_err, + Opt_err_panic, Opt_err_ro, Opt_discard, Opt_err, }; static const match_table_t fat_tokens = { @@ -899,6 +901,7 @@ static const match_table_t fat_tokens = { {Opt_err_cont, "errors=continue"}, {Opt_err_panic, "errors=panic"}, {Opt_err_ro, "errors=remount-ro"}, + {Opt_discard, "discard"}, {Opt_obsolate, "conv=binary"}, {Opt_obsolate, "conv=text"}, {Opt_obsolate, "conv=auto"}, @@ -1136,6 +1139,9 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug, case Opt_rodir: opts->rodir = 1; break; + case Opt_discard: + opts->discard = 1; + break; /* obsolete mount options */ case Opt_obsolate: |
