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Btrfs: modify rw_devices counter under chunk_mutex context 

rw_devices counter is often used to tune the profile when doing chunk allocation,
so we should modify it under the chunk_mutex context to avoid getting wrong
chunk profile.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
hifive-unleashed-5.1
Miao Xie 2014-09-03 21:35:47 +08:00 committed by Chris Mason
parent 5f37583569
commit c3929c3624
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/volumes.c
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@ -1649,8 +1649,8 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
if (device->writeable) {
lock_chunks(root);
list_del_init(&device->dev_alloc_list);
device->fs_devices->rw_devices--;
unlock_chunks(root);
root->fs_info->fs_devices->rw_devices--;
clear_super = true;
}
@ -1795,8 +1795,8 @@ error_undo:
lock_chunks(root);
list_add(&device->dev_alloc_list,
&root->fs_info->fs_devices->alloc_list);
device->fs_devices->rw_devices++;
unlock_chunks(root);
root->fs_info->fs_devices->rw_devices++;
}
goto error_brelse;
}