Re: [RFC PATCH] mm/vmalloc: request large order pages from buddy allocator

[Christoph Hellwig]

On Wed, Oct 15, 2025 at 03:42:50PM +0200, Uladzislau Rezki wrote:
> Agree. We do not want BUG_ON() in split_page(). I think it is better to
> control this even though nobody invokes vmalloc() with __GFP_COMP.

Please explicitly warn and reject vmalloc calls with unsupported
flag.  The fact that many flags get silently ignored or dropped or
could lead to behavior in gfp_t based interfaces is a constant source
of problems.