On Thu, 22 Aug 2024 at 14:40, Linus Torvalds
<torva...@linux-foundation.org> wrote:
>
> I did find three cases of kvcalloc(NOFAIL) in the nouveau driver and
> one in erofs. It's not clear that any of them make much sense (or that
> the erofs one is actually a large allocation).
Oh, and I missed one in btrfs because it needed five lines of context
due to being the allocation from hell.
That said, yes, the vmalloc case at least has no fragmentation issues,
but I do think even that needs to be size limited for sanity.
The size limit might be larger than a couple of pages, but not
_hugely_ larger. You can't just say "I want a megabyte, and you can't
fail me". That kind of code is garbage, and needs to be called out for
being garbage.
Linus
