From: Nikolay Borisov <nborisov@suse.com>
To: Anand Jain <anand.jain@oracle.com>, linux-btrfs@vger.kernel.org
Cc: dsterba@suse.com, josef@toxicpanda.com
Subject: Re: [PATCH 07/11] btrfs: cleanup btrfs_remove_chunk
Date: Mon, 31 Aug 2020 11:43:04 +0300 [thread overview]
Message-ID: <dbfca9e5-ee13-0d3e-57f0-6ba1bbe2a190@suse.com> (raw)
In-Reply-To: <e8480a482baedb6dd044fae1aba78be8ac3992f4.1598792561.git.anand.jain@oracle.com>
On 30.08.20 г. 17:41 ч., Anand Jain wrote:
> In the function btrfs_remove_chunk() remove the local variable
> %fs_devices, instead use the assigned pointer directly.
>
> Signed-off-by: Anand Jain <anand.jain@oracle.com>
So this is minor enough and correct, however, have measured whether
having multiple fs_info::fs_devices:device_list_Mutex derefs results in
slightly (perhaps negligible) increase in code size.
In any case the code is correct, so:
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
> ---
> fs/btrfs/volumes.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 7639a048c6cf..3e7a7d94a211 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -2922,7 +2922,6 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset)
> struct map_lookup *map;
> u64 dev_extent_len = 0;
> int i, ret = 0;
> - struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
>
> em = btrfs_get_chunk_map(fs_info, chunk_offset, 1);
> if (IS_ERR(em)) {
> @@ -2944,14 +2943,14 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset)
> * a device replace operation that replaces the device object associated
> * with map stripes (dev-replace.c:btrfs_dev_replace_finishing()).
> */
> - mutex_lock(&fs_devices->device_list_mutex);
> + mutex_lock(&fs_info->fs_devices->device_list_mutex);
> for (i = 0; i < map->num_stripes; i++) {
> struct btrfs_device *device = map->stripes[i].dev;
> ret = btrfs_free_dev_extent(trans, device,
> map->stripes[i].physical,
> &dev_extent_len);
> if (ret) {
> - mutex_unlock(&fs_devices->device_list_mutex);
> + mutex_unlock(&fs_info->fs_devices->device_list_mutex);
> btrfs_abort_transaction(trans, ret);
> goto out;
> }
> @@ -2967,12 +2966,12 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset)
>
> ret = btrfs_update_device(trans, device);
> if (ret) {
> - mutex_unlock(&fs_devices->device_list_mutex);
> + mutex_unlock(&fs_info->fs_devices->device_list_mutex);
> btrfs_abort_transaction(trans, ret);
> goto out;
> }
> }
> - mutex_unlock(&fs_devices->device_list_mutex);
> + mutex_unlock(&fs_info->fs_devices->device_list_mutex);
>
> ret = btrfs_free_chunk(trans, chunk_offset);
> if (ret) {
>
next prev parent reply other threads:[~2020-08-31 8:43 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-31 1:38 [PATCH 0/11] btrfs: seed fix null ptr, use only main device_list_mutex, and cleanups Anand Jain
2020-08-21 13:15 ` [PATCH RFC] btrfs/163: replace sprout instead of seed Anand Jain
2020-08-21 13:15 ` [PATCH 1/2] btrfs: initialize sysfs devid and device link for seed device Anand Jain
2020-08-21 13:15 ` [PATCH RFC 2/2] btrfs: fix replace of " Anand Jain
2020-08-21 14:38 ` Josef Bacik
2020-08-23 15:05 ` Anand Jain
2020-08-21 14:36 ` [PATCH 1/2] btrfs: initialize sysfs devid and device link for " Josef Bacik
2020-08-23 13:05 ` Anand Jain
2020-08-29 11:44 ` Anand Jain
2020-08-30 14:41 ` [PATCH] fstests: btrfs/163: replace sprout instead of seed Anand Jain
2020-08-30 14:40 ` Anand Jain
2020-08-30 14:40 ` [PATCH 01/11] btrfs: initialize sysfs devid and device link for seed device Anand Jain
2020-08-31 9:07 ` Nikolay Borisov
2020-08-31 12:00 ` Anand Jain
2020-08-31 16:21 ` Josef Bacik
2020-09-01 16:16 ` Anand Jain
2020-08-30 14:40 ` [PATCH 02/11] btrfs: refactor btrfs_sysfs_add_devices_dir Anand Jain
2020-08-30 14:40 ` [PATCH 03/11] btrfs: refactor btrfs_sysfs_remove_devices_dir Anand Jain
2020-08-31 8:58 ` Nikolay Borisov
2020-08-31 9:12 ` Anand Jain
2020-08-30 14:40 ` [PATCH 04/11] btrfs: reada: use sprout device_list_mutex Anand Jain
2020-08-31 8:54 ` Nikolay Borisov
2020-08-31 16:08 ` Josef Bacik
2020-09-01 9:02 ` Anand Jain
2020-08-30 14:41 ` [PATCH 05/11] btrfs: btrfs_init_devices_late: " Anand Jain
2020-08-31 8:37 ` Nikolay Borisov
2020-09-01 8:54 ` Anand Jain
2020-08-30 14:41 ` [PATCH 06/11] btrfs: open code list_head pointer in btrfs_init_dev_replace_tgtdev Anand Jain
2020-08-31 8:38 ` Nikolay Borisov
2020-08-30 14:41 ` [PATCH 07/11] btrfs: cleanup btrfs_remove_chunk Anand Jain
2020-08-31 8:43 ` Nikolay Borisov [this message]
2020-08-30 14:41 ` [PATCH 08/11] btrfs: cleanup btrfs_assign_next_active_device() Anand Jain
2020-08-31 8:44 ` Nikolay Borisov
2020-08-30 14:41 ` [PATCH 09/11] btrfs: cleanup unnecessary goto in open_seed_device Anand Jain
2020-08-31 8:44 ` Nikolay Borisov
2020-08-30 14:41 ` [PATCH 10/11] btrfs: btrfs_dev_replace_update_device_in_mapping_tree drop file global declare Anand Jain
2020-08-31 8:46 ` Nikolay Borisov
2020-08-30 14:41 ` [PATCH 11/11] btrfs: fix replace of seed device Anand Jain
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