Re: [PATCH for-6.18/block 1/2] blk-cgroup: allocate policy data with GFP_NOIO in blkcg_activate_policy()

[Ming Lei <ming.lei@xxxxxxxxxx>]

On Tue, Sep 23, 2025 at 4:06 PM Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> wrote:
>
> From: Yu Kuai <yukuai3@xxxxxxxxxx>
>
> Queue is freezed while activating policy, allocate memory with queue
> freezed has the risk of deadlock because memory reclaim can issue new
> IO.

blk_mq_freeze_queue() already covers it by calling memalloc_noio_save(),
so this patch looks not necessary.

Or do you have a lockdep warning?

Thanks,