Re: [PATCH 4/9] mm: vmalloc: Add a per-CPU-zone infrastructure

[Christoph Hellwig]

On Mon, May 22, 2023 at 01:08:44PM +0200, Uladzislau Rezki (Sony) wrote:
> +#define fbl(z, i, m) z->fbl[i].m
> +#define fbl_root(z, i) fbl(z, i, root)
> +#define fbl_head(z, i) fbl(z, i, head)
> +
> +#define fbl_lock(z, i) spin_lock(&fbl(z, i, lock))
> +#define fbl_unlock(z, i) spin_unlock(&fbl(z, i, lock))

Even if it is just temporary, I don't think adding these wrappers
make much sense.

> +struct cpu_vmap_zone {
> +	/*
> +	 * FREE, BUSY, LAZY bookkeeping data of this CPU zone.
> +	 */
> +	struct {
> +		struct rb_root root;
> +		struct list_head head;
> +		spinlock_t lock;
> +	} fbl[NFBL];

Maybe replace NFBL with something longer and more descriptive?

But also in general it feels like this should be folded into a patch
doing real work.  As-is it doesn't look very useful.