Re: [PATCH v2 1/1] mm/slab: mark alloc tags empty for sheafs allocated with __GFP_NO_OBJ_EXT

[Harry Yoo]

On Tue, Feb 24, 2026 at 02:11:32PM -0800, Suren Baghdasaryan wrote:
> alloc_empty_sheaf() allocates sheafs from SLAB_KMALLOC caches using

nit: the plural form of sheaf is "sheaves" ;)

> __GFP_NO_OBJ_EXT to avoid recursion, however it does not mark their
> allocation tags empty before freeing, which results in a warning when
> CONFIG_MEM_ALLOC_PROFILING_DEBUG is set. Fix this by marking allocation
> tags for such allocations as empty.
> 
> Reported-by: David Wang <00107082@xxxxxxx>
> Closes: https://lore.kernel.org/all/20260223155128.3849-1-00107082@xxxxxxx/
> Analyzed-by: Harry Yoo <harry.yoo@xxxxxxxxxx>
> Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
> ---

This resolves the issue on my machine.
and the fix looks good to me, so:

Tested-by: Harry Yoo <harry.yoo@xxxxxxxxxx>

and

Reviewed-by: Harry Yoo <harry.yoo@xxxxxxxxxx>

By the way, perhaps it's worth adding a comment on __GFP_NO_OBJ_EXT
saying "you need to call mark_objexts_empty() before freeing the
object".

-- 
Cheers,
Harry / Hyeonggon