Re: [PATCH] blk-wbt: do not throttle swap write on processes other than kswapd

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

On Thu, Aug 11, 2022 at 07:32:25PM +0800, Hongchen Zhang wrote:
> +		if (current_is_kswapd() ||
> +		    (bio->bi_end_io != end_swap_bio_write))
> +			flags |= WBT_TRACKED;

Why can't this just use REQ_SWAP instead of doing strange poking into
deep kernel internals?