Re: [PATCH V2 0/2] mm/slab: support kmalloc_nolock() -> kfree[_rcu]()

[Vlastimil Babka <vbabka@suse.cz>]

On 2/10/26 05:46, Harry Yoo wrote:
> This is separated from the RFC version of "k[v]free_rcu() improvements"
> series [1], as these changes are relatively small and beneficial for BPF
> because it enables the bpf code to use kfree_rcu() instead of
> call_rcu() + kfree_nolock().
> 
> Patch 1 allows kfree() and kfree_rcu() to be used with objects that are
> allocated from kmalloc_nolock().
> 
> Patch 2 is a cleanup that frees a bit used to record whether obj_exts
> was allocated using kmalloc_nolock() or kmalloc(), since now both cases
> can be freed with kfree().
> 
> [1] https://lore.kernel.org/linux-mm/20260206093410.160622-1-harry.yoo@oracle.com

Thanks, added to slab/for-next

> v1 -> v2:
>   - Added Catalin's Reviewed-by tag on patch 1, and Alexei's Acked-by tag
>     on patch 2 that I forgot to add. Thanks!
> 
>   - Fix calling kfree() in free_slab_obj_exts() and alloc_slab_obj_exts()
>     when !allow_spin. Pass allow_spin parameter down to free_slab_obj_exts().
> 
> V1:  https://lore.kernel.org/linux-mm/20260209121013.50475-1-harry.yoo@oracle.com
> 
> Harry Yoo (2):
>   mm/slab: allow freeing kmalloc_nolock()'d objects using kfree[_rcu]()
>   mm/slab: drop the OBJEXTS_NOSPIN_ALLOC flag from enum objext_flags
> 
>  include/linux/memcontrol.h |  3 +--
>  include/linux/rcupdate.h   |  4 ++--
>  mm/kmemleak.c              | 22 ++++++++++-----------
>  mm/slub.c                  | 39 +++++++++++++++++++++++++++-----------
>  4 files changed, 41 insertions(+), 27 deletions(-)
> 
> 
> base-commit: f6ed7e47c1fc78e78c9bfeb668b1ad9ba5c58120