BDI_CAP_CGROUP_WRITEBACK 505 block/blk-core.c q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK; BDI_CAP_CGROUP_WRITEBACK 2965 fs/btrfs/disk-io.c sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; BDI_CAP_CGROUP_WRITEBACK 261 include/linux/backing-dev.h (bdi->capabilities & BDI_CAP_CGROUP_WRITEBACK) &&