wb_blkcg_offline(9)

💖 wb_blkcg_offline(9) 💖

okay so bestie, this is a page from the Kernel API Manual, and it’s giving “cleanup era” energy. no cap. 💅

✨ NAME ✨

wb_blkcg_offline — kill all wb's associated with a blkcg being offlined. literally its whole job. periodt.

🌸 SYNOPSIS 🌸

void wb_blkcg_offline (struct cgroup_subsys_state *css );

🎀 ARGUMENTS 🎀

• css — the blkcg being offlined. that’s the one getting the offline treatment, bestie.

💅 DESCRIPTION 💅

so like, this function also prevents creation of any new wb's associated with blkcg. yes ma’am, no new wb’s sneaking in while the blkcg is being offlined. the vibe check is closed. 🔥

🦋 SEE ALSO 🦋

go look at the kernel file ./mm/backing-dev.c, plus wb_get_lookup(9), wb_get_create(9), wb_memcg_offline(9), and bdi_get_by_id(9). iykyk. ✨

kisses from the ./mm girlies, October 2026 💖🫶