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| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2014-01-13 09:36:06 +0400 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-01-29 01:20:33 +0400 |
| commit | 3818aea275423236db38a2d2d0a4951bc6da2e01 (patch) | |
| tree | 8f6c5e005a8be46049554306acf32786eb3c7d32 /fs/btrfs/disk-io.c | |
| parent | ade2e0b3eeca941a5cd486bac21599ff87f288c8 (diff) | |
| download | linux-3818aea275423236db38a2d2d0a4951bc6da2e01.tar.xz | |
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/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index f0e7bbe14823..4f142c986544 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2776,6 +2776,10 @@ retry_root_backup: btrfs_set_opt(fs_info->mount_opt, SSD); } + /* Set the real inode map cache flag */ + if (btrfs_test_opt(tree_root, CHANGE_INODE_CACHE)) + btrfs_set_opt(tree_root->fs_info->mount_opt, INODE_MAP_CACHE); + #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { ret = btrfsic_mount(tree_root, fs_devices, |