* [PATCH] btrfs: Remove alloc_list splice in btrfs_prepare_sprout
@ 2020-08-12 13:26 Nikolay Borisov
2020-08-12 13:56 ` Josef Bacik
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Nikolay Borisov @ 2020-08-12 13:26 UTC (permalink / raw)
To: linux-btrfs; +Cc: Nikolay Borisov
btrfs_prepare_sprout is called when the first rw device is added to a
seed filesystem. This means the filesystem can't have its alloc_list
be non-empty, since seed filesystems are read only. Simply remove the
code altogether.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
---
fs/btrfs/volumes.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 71480175e8cb..4bae30b9c944 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2385,10 +2385,6 @@ static int btrfs_prepare_sprout(struct btrfs_fs_info *fs_info)
list_for_each_entry(device, &seed_devices->devices, dev_list)
device->fs_devices = seed_devices;
- mutex_lock(&fs_info->chunk_mutex);
- list_splice_init(&fs_devices->alloc_list, &seed_devices->alloc_list);
- mutex_unlock(&fs_info->chunk_mutex);
-
fs_devices->seeding = false;
fs_devices->num_devices = 0;
fs_devices->open_devices = 0;
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] btrfs: Remove alloc_list splice in btrfs_prepare_sprout
2020-08-12 13:26 [PATCH] btrfs: Remove alloc_list splice in btrfs_prepare_sprout Nikolay Borisov
@ 2020-08-12 13:56 ` Josef Bacik
2020-08-14 6:29 ` Anand Jain
2020-08-26 16:11 ` David Sterba
2 siblings, 0 replies; 4+ messages in thread
From: Josef Bacik @ 2020-08-12 13:56 UTC (permalink / raw)
To: Nikolay Borisov, linux-btrfs
On 8/12/20 9:26 AM, Nikolay Borisov wrote:
> btrfs_prepare_sprout is called when the first rw device is added to a
> seed filesystem. This means the filesystem can't have its alloc_list
> be non-empty, since seed filesystems are read only. Simply remove the
> code altogether.
>
> Signed-off-by: Nikolay Borisov <nborisov@suse.com>
> ---
> fs/btrfs/volumes.c | 4 ----
> 1 file changed, 4 deletions(-)
>
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 71480175e8cb..4bae30b9c944 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -2385,10 +2385,6 @@ static int btrfs_prepare_sprout(struct btrfs_fs_info *fs_info)
> list_for_each_entry(device, &seed_devices->devices, dev_list)
> device->fs_devices = seed_devices;
>
> - mutex_lock(&fs_info->chunk_mutex);
> - list_splice_init(&fs_devices->alloc_list, &seed_devices->alloc_list);
> - mutex_unlock(&fs_info->chunk_mutex);
> -
> fs_devices->seeding = false;
> fs_devices->num_devices = 0;
> fs_devices->open_devices = 0;
>
Ok this took me a second, we swap out the seed_devices and the new fs_devices is
what becomes the main thing for the fs.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Thanks,
Josef
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] btrfs: Remove alloc_list splice in btrfs_prepare_sprout
2020-08-12 13:26 [PATCH] btrfs: Remove alloc_list splice in btrfs_prepare_sprout Nikolay Borisov
2020-08-12 13:56 ` Josef Bacik
@ 2020-08-14 6:29 ` Anand Jain
2020-08-26 16:11 ` David Sterba
2 siblings, 0 replies; 4+ messages in thread
From: Anand Jain @ 2020-08-14 6:29 UTC (permalink / raw)
To: Nikolay Borisov, linux-btrfs
On 12/8/20 9:26 pm, Nikolay Borisov wrote:
> btrfs_prepare_sprout is called when the first rw device is added to a
> seed filesystem. This means the filesystem can't have its alloc_list
> be non-empty, since seed filesystems are read only. Simply remove the
> code altogether.
>
> Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] btrfs: Remove alloc_list splice in btrfs_prepare_sprout
2020-08-12 13:26 [PATCH] btrfs: Remove alloc_list splice in btrfs_prepare_sprout Nikolay Borisov
2020-08-12 13:56 ` Josef Bacik
2020-08-14 6:29 ` Anand Jain
@ 2020-08-26 16:11 ` David Sterba
2 siblings, 0 replies; 4+ messages in thread
From: David Sterba @ 2020-08-26 16:11 UTC (permalink / raw)
To: Nikolay Borisov; +Cc: linux-btrfs
On Wed, Aug 12, 2020 at 04:26:46PM +0300, Nikolay Borisov wrote:
> btrfs_prepare_sprout is called when the first rw device is added to a
> seed filesystem. This means the filesystem can't have its alloc_list
> be non-empty, since seed filesystems are read only. Simply remove the
> code altogether.
>
> Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Added to the rest of seed patches, thanks.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-08-26 16:13 UTC | newest]
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2020-08-12 13:26 [PATCH] btrfs: Remove alloc_list splice in btrfs_prepare_sprout Nikolay Borisov
2020-08-12 13:56 ` Josef Bacik
2020-08-14 6:29 ` Anand Jain
2020-08-26 16:11 ` David Sterba
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