From 62b8e077317971b74d79c9cc501db2ae861d48b2 Mon Sep 17 00:00:00 2001 From: Howard McLauchlan Date: Thu, 8 Mar 2018 10:48:48 -0800 Subject: [PATCH] btrfs: Add nossd_spread mount option Btrfs has two mount options for SSD optimizations: ssd and ssd_spread. Presently there is an option to disable all SSD optimizations, but there isn't an option to disable just ssd_spread. This patch adds a mount option nossd_spread that disables ssd_spread only. Reviewed-by: Josef Bacik Signed-off-by: Howard McLauchlan Reviewed-by: Omar Sandoval Signed-off-by: David Sterba --- fs/btrfs/super.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index defaccde8d16..121b9d40ff8f 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -310,10 +310,10 @@ static void btrfs_put_super(struct super_block *sb) enum { Opt_degraded, Opt_subvol, Opt_subvolid, Opt_device, Opt_nodatasum, Opt_nodatacow, Opt_max_inline, Opt_alloc_start, Opt_nobarrier, Opt_ssd, - Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl, Opt_compress, - Opt_compress_type, Opt_compress_force, Opt_compress_force_type, - Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_discard, - Opt_space_cache, Opt_space_cache_version, Opt_clear_cache, + Opt_nossd, Opt_ssd_spread, Opt_nossd_spread, Opt_thread_pool, Opt_noacl, + Opt_compress, Opt_compress_type, Opt_compress_force, + Opt_compress_force_type, Opt_notreelog, Opt_ratio, Opt_flushoncommit, + Opt_discard, Opt_space_cache, Opt_space_cache_version, Opt_clear_cache, Opt_user_subvol_rm_allowed, Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_inode_cache, Opt_no_space_cache, Opt_recovery, Opt_skip_balance, Opt_check_integrity, @@ -353,6 +353,7 @@ static const match_table_t tokens = { {Opt_ssd, "ssd"}, {Opt_ssd_spread, "ssd_spread"}, {Opt_nossd, "nossd"}, + {Opt_nossd_spread, "nossd_spread"}, {Opt_acl, "acl"}, {Opt_noacl, "noacl"}, {Opt_notreelog, "notreelog"}, @@ -579,6 +580,8 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, btrfs_set_opt(info->mount_opt, NOSSD); btrfs_clear_and_info(info, SSD, "not using ssd optimizations"); + /* Fallthrough */ + case Opt_nossd_spread: btrfs_clear_and_info(info, SSD_SPREAD, "not using spread ssd allocation scheme"); break;