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btrfs: zoned: use filesystem size not disk size for reclaim decision

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commit 55f7c65b2f69c7e4cb7aa7c1654a228ccf734fd8 upstream.

When deciding if a zoned filesystem is reaching the threshold to reclaim
data block groups, look at the size of the filesystem not to potentially
total available size of all drives in the filesystem.

Especially if a filesystem was created with mkfs' -b option, constraining
it to only a portion of the block device, the numbers won't match and
potentially garbage collection is kicking in too late.

Fixes: 3687fcb075 ("btrfs: zoned: make auto-reclaim less aggressive")
CC: stable@vger.kernel.org # 6.1+
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Tested-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johannes Thumshirn
2025-05-20 09:20:47 +02:00
committed by Greg Kroah-Hartman
parent 9dfe40cb6c
commit ec5bfcfb6e
1 changed files with 1 additions and 2 deletions
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3
fs/btrfs/zoned.c
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@@ -2350,8 +2350,8 @@ bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
u64 total = btrfs_super_total_bytes(fs_info->super_copy);
u64 used = 0;
u64 total = 0;
u64 factor;
ASSERT(btrfs_is_zoned(fs_info));
@@ -2364,7 +2364,6 @@ bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info)
if (!device->bdev)
continue;
total += device->disk_total_bytes;
used += device->bytes_used;
}
mutex_unlock(&fs_devices->device_list_mutex);