From 8f662a76c6af8eb367fa519e9bb9766040d9cea8 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Wed, 2 Jan 2008 10:01:11 -0500 Subject: Btrfs: Add readahead to the online shrinker, and a mount -o alloc_start= for testing Signed-off-by: Chris Mason --- fs/btrfs/super.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'fs/btrfs/super.c') diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 3bbd7f665694..f1b56eb77b1d 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -63,7 +63,8 @@ static void btrfs_put_super (struct super_block * sb) } enum { - Opt_subvol, Opt_nodatasum, Opt_nodatacow, Opt_max_extent, Opt_err, + Opt_subvol, Opt_nodatasum, Opt_nodatacow, Opt_max_extent, + Opt_alloc_start, Opt_err, }; static match_table_t tokens = { @@ -71,6 +72,7 @@ static match_table_t tokens = { {Opt_nodatasum, "nodatasum"}, {Opt_nodatacow, "nodatacow"}, {Opt_max_extent, "max_extent=%s"}, + {Opt_alloc_start, "alloc_start=%s"}, {Opt_err, NULL} }; @@ -162,6 +164,18 @@ static int parse_options (char * options, } } break; + case Opt_alloc_start: + if (info) { + char *num = match_strdup(&args[0]); + if (num) { + info->alloc_start = + btrfs_parse_size(num); + kfree(num); + printk("btrfs: allocations start at " + "%Lu\n", info->alloc_start); + } + } + break; default: break; } -- cgit v1.2.2