Re: [PATCH] mm/vmalloc: do not output a spurious warning when huge vmalloc() fails

[Lorenzo Stoakes]

On Wed, Jun 07, 2023 at 10:58:40AM +0200, Vlastimil Babka wrote:
> I think I found the commit from 6.3 that effectively exposed this warning.
> As this is a tracked regression I would really suggest moving the fix to
> mm-hotfixes instead of mm-unstable, and
>
> Fixes: 80b1d8fdfad1 ("mm: vmalloc: correct use of __GFP_NOWARN mask in __vmalloc_area_node()")
> Cc: <stable@xxxxxxxxxxxxxxx>

Yeah, ugh. What's irritating is that this is not incorrect - invoking
warn_alloc() in such a way that it does literally nothing is not right, so
that fix was required, but it simply exposed another issue.

But completely agree this is technically a regression, and yes Andrew it'd
be great if we could move this to hotfixes and append the stable cc if
possible thanks!

(We definitely need to refactor a lot of this code!)