Hi Chris-
Just pinging you on this patch...
On Fri, 23 Jan 2009, Sage Weil wrote:
> Add a 'notreelog' mount option to disable the tree log (used by fsync,
> O_SYNC writes).
>
> Signed-off-by: Sage Weil <sage@xxxxxxxxxxxx>
> ---
> fs/btrfs/ctree.h | 1 +
> fs/btrfs/super.c | 8 +++++++-
> fs/btrfs/tree-log.c | 4 ++++
> 3 files changed, 12 insertions(+), 1 deletions(-)
>
> diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
> index de103a8..471fa67 100644
> --- a/fs/btrfs/ctree.h
> +++ b/fs/btrfs/ctree.h
> @@ -950,6 +950,7 @@ struct btrfs_root {
> #define BTRFS_MOUNT_SSD (1 << 3)
> #define BTRFS_MOUNT_DEGRADED (1 << 4)
> #define BTRFS_MOUNT_COMPRESS (1 << 5)
> +#define BTRFS_MOUNT_NOTREELOG (1 << 6)
>
> #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
> #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> index 4c0b756..d8c664c 100644
> --- a/fs/btrfs/super.c
> +++ b/fs/btrfs/super.c
> @@ -66,7 +66,8 @@ static void btrfs_put_super(struct super_block *sb)
> enum {
> Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow,
> Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier,
> - Opt_ssd, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_err,
> + Opt_ssd, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_notreelog,
> + Opt_err,
> };
>
> static match_table_t tokens = {
> @@ -83,6 +84,7 @@ static match_table_t tokens = {
> {Opt_compress, "compress"},
> {Opt_ssd, "ssd"},
> {Opt_noacl, "noacl"},
> + {Opt_notreelog, "notreelog"},
> {Opt_err, NULL},
> };
>
> @@ -222,6 +224,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
> case Opt_noacl:
> root->fs_info->sb->s_flags &= ~MS_POSIXACL;
> break;
> + case Opt_notreelog:
> + printk(KERN_INFO "btrfs: disabling tree log\n");
> + btrfs_set_opt(info->mount_opt, NOTREELOG);
> + break;
> default:
> break;
> }
> diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
> index 4f26f3e..ac58991 100644
> --- a/fs/btrfs/tree-log.c
> +++ b/fs/btrfs/tree-log.c
> @@ -2757,6 +2757,10 @@ int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
> struct btrfs_root *root, struct dentry *dentry)
> {
> u64 gen;
> +
> + if (btrfs_test_opt(root, NOTREELOG))
> + return 1;
> +
> gen = root->fs_info->last_trans_new_blockgroup;
> if (gen > root->fs_info->last_trans_committed)
> return 1;
> --
> 1.5.6.5
>
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>
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