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I'd move the drive over there. > > Two practical questions, since I've never built a patched kernel > for testing: > - Which base should I apply the series to (e.g. 7.3, or a > specific btrfs branch)? > - Is there a git branch with the series applied that I could > use instead? I think I could re-create the issue and unfortunately Dongjiang's patch didn't fix it for me (I've only applied patch 2 not the whole branch). What fixes it for me is: diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 3192b86669b9..3724cc0120d9 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -3115,8 +3115,12 @@ void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM))) continue; - for (int i = 0; i < map->num_stripes; i++) - map->stripes[i].dev->zone_info->reserved_active_zones--; + for (int i = 0; i < map->num_stripes; i++) { + struct btrfs_device *dev = map->stripes[i].dev; + + if (btrfs_dev_is_sequential(dev, map->stripes[i].physical)) + dev->zone_info->reserved_active_zones--; + } } spin_unlock(&fs_info->zone_active_bgs_lock); }