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| author | Eric Sandeen <sandeen@redhat.com> | 2009-11-19 14:25:42 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-11-19 14:25:42 -0500 |
| commit | 5328e635315734d42080de9a5a1ee87bf4cae0a4 (patch) | |
| tree | 4952c04c9b1faec9a3c82a3743805efad05ed96e /fs/ext4/super.c | |
| parent | 2bba702d4f88d7b010ec37e2527b552588404ae7 (diff) | |
| download | blackbird-op-linux-5328e635315734d42080de9a5a1ee87bf4cae0a4.tar.gz blackbird-op-linux-5328e635315734d42080de9a5a1ee87bf4cae0a4.zip | |
ext4: make trim/discard optional (and off by default)
It is anticipated that when sb_issue_discard starts doing
real work on trim-capable devices, we may see issues. Make
this mount-time optional, and default it to off until we know
that things are working out OK.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index f2d5ec77c1e9..2b382f6f80c1 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -899,6 +899,9 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) if (test_opt(sb, NO_AUTO_DA_ALLOC)) seq_puts(seq, ",noauto_da_alloc"); + if (test_opt(sb, DISCARD)) + seq_puts(seq, ",discard"); + ext4_show_quota_options(seq, sb); return 0; @@ -1079,7 +1082,8 @@ enum { Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_block_validity, Opt_noblock_validity, - Opt_inode_readahead_blks, Opt_journal_ioprio + Opt_inode_readahead_blks, Opt_journal_ioprio, + Opt_discard, Opt_nodiscard, }; static const match_table_t tokens = { @@ -1144,6 +1148,8 @@ static const match_table_t tokens = { {Opt_auto_da_alloc, "auto_da_alloc=%u"}, {Opt_auto_da_alloc, "auto_da_alloc"}, {Opt_noauto_da_alloc, "noauto_da_alloc"}, + {Opt_discard, "discard"}, + {Opt_nodiscard, "nodiscard"}, {Opt_err, NULL}, }; @@ -1565,6 +1571,12 @@ set_qf_format: else set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); break; + case Opt_discard: + set_opt(sbi->s_mount_opt, DISCARD); + break; + case Opt_nodiscard: + clear_opt(sbi->s_mount_opt, DISCARD); + break; default: ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " |
