On Tue, Jan 23, 2024 at 05:33:52PM +0800, zhaoyang.huang wrote:
> #define ALLOC_CACHE_MAX 256
> @@ -1069,12 +1070,21 @@ EXPORT_SYMBOL_GPL(bio_add_zone_append_page);
> void __bio_add_page(struct bio *bio, struct page *page,
> unsigned int len, unsigned int off)
> {
> + int class, level, hint, activity;
> +
> + class = IOPRIO_PRIO_CLASS(bio->bi_ioprio);
> + level = IOPRIO_PRIO_LEVEL(bio->bi_ioprio);
> + hint = IOPRIO_PRIO_HINT(bio->bi_ioprio);
> + activity = IOPRIO_PRIO_ACTIVITY(bio->bi_ioprio);
> +
> WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED));
> WARN_ON_ONCE(bio_full(bio, len));
>
> bvec_set_page(&bio->bi_io_vec[bio->bi_vcnt], page, len, off);
> bio->bi_iter.bi_size += len;
> bio->bi_vcnt++;
> + activity += (bio->bi_vcnt <= IOPRIO_NR_ACTIVITY && PageWorkingset(page)) ? 1 : 0;
The block layer must not look at page bits. I've fixed all this crap
with a lot of work and we're not going to re-add it for another qute
hack. The place to figure out any kind of I/O priority is the file
system (preferably using generic helpers).
