Re: [PATCH v3 0/4] mm: clarify nofail memory allocation

[Michal Hocko <mhocko@suse.com>]

On Thu 22-08-24 17:44:22, Linus Torvalds wrote:
[...]
> And dammit, those kvmalloc() sizes need to be limited too. A number
> like 24kB was mentioned. That sounds fine. Maybe even 64kB. But make
> it *SMALL*.

I am not particularly bothered by exact size for kvmalloc. There should
be a limit all right, but whether that is 1MB or 64kB shouldn't make
much of a difference because we do use 4kB pages to back those
allocations anyway. Sure 32b is a different story because the vmalloc
space itself is a scarce resource but do we care about those?

> And make it clear that it will return NULL if somebody misuses it.

What do you expect users do with the return value then?

-- 
Michal Hocko
SUSE Labs