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| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2014-01-13 13:36:06 +0800 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-01-28 13:20:33 -0800 |
| commit | 3818aea275423236db38a2d2d0a4951bc6da2e01 (patch) | |
| tree | 8f6c5e005a8be46049554306acf32786eb3c7d32 /fs/btrfs/super.c | |
| parent | ade2e0b3eeca941a5cd486bac21599ff87f288c8 (diff) | |
| download | linux-3818aea275423236db38a2d2d0a4951bc6da2e01.tar.bz2 | |
btrfs: Add noinode_cache mount option
Add noinode_cache mount option for btrfs.
Since inode map cache involves all the btrfs_find_free_ino/return_ino
things and if just trigger the mount_opt,
an inode number get from inode map cache will not returned to inode map
cache.
To keep the find and return inode both in the same behavior,
a new bit in mount_opt, CHANGE_INODE_CACHE, is introduced for this idea.
CHANGE_INODE_CACHE is set/cleared in remounting, and the original
INODE_MAP_CACHE is set/cleared according to CHANGE_INODE_CACHE after a
success transaction.
Since find/return inode is all done between btrfs_start_transaction and
btrfs_commit_transaction, this will keep consistent behavior.
Also noinode_cache mount option will not stop the caching_kthread.
Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index f44cc6a0eb27..362aef44a17b 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -327,7 +327,7 @@ enum { Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree, Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard, Opt_noenospc_debug, Opt_noflushoncommit, Opt_acl, Opt_datacow, - Opt_datasum, Opt_treelog, + Opt_datasum, Opt_treelog, Opt_noinode_cache, Opt_err, }; @@ -370,6 +370,7 @@ static match_table_t tokens = { {Opt_defrag, "autodefrag"}, {Opt_nodefrag, "noautodefrag"}, {Opt_inode_cache, "inode_cache"}, + {Opt_noinode_cache, "noinode_cache"}, {Opt_no_space_cache, "nospace_cache"}, {Opt_recovery, "recovery"}, {Opt_skip_balance, "skip_balance"}, @@ -627,7 +628,12 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) break; case Opt_inode_cache: btrfs_info(root->fs_info, "enabling inode map caching"); - btrfs_set_opt(info->mount_opt, INODE_MAP_CACHE); + btrfs_set_opt(info->mount_opt, CHANGE_INODE_CACHE); + break; + case Opt_noinode_cache: + if (btrfs_test_opt(root, CHANGE_INODE_CACHE)) + btrfs_info(root->fs_info, "disabling inode map caching"); + btrfs_clear_opt(info->mount_opt, CHANGE_INODE_CACHE); break; case Opt_clear_cache: btrfs_info(root->fs_info, "force clearing of disk cache"); |