Re: [PATCH] slub: use N_NORMAL_MEMORY in can_free_to_pcs to handle remote frees

[Hao Li]

On Fri, Apr 03, 2026 at 08:14:11PM +0200, Vlastimil Babka (SUSE) wrote:
> On 4/3/26 14:02, Harry Yoo (Oracle) wrote:
> > On Fri, Apr 03, 2026 at 03:37:36PM +0800, Hao Li wrote:
> >> Memory hotplug now keeps N_NORMAL_MEMORY up to date correctly, so make
> >> can_free_to_pcs() use it.
> >> 
> >> As a result, when freeing objects on memoryless nodes, or on nodes that
> >> have memory but only in ZONE_MOVABLE, the objects can be freed to the
> >> sheaf instead of going through the slow path.
> >> 
> >> Signed-off-by: Hao Li <hao.li@xxxxxxxxx>
> >> ---
> > 
> > Acked-by: Harry Yoo (Oracle) <harry@xxxxxxxxxx>

Thanks for Ack!

> > 
> >> Hi Vlastimil, this patch depends on a prerequisite patch[1] from a few days
> >> ago. I'm not sure how this should be handled.
> > 
> >> I wonder if Andrew might put them in the same tree.
> 
> > But it also depends on the patch series
> > "[PATCH 0/3] slab: support memoryless nodes with sheaves".
> > 
> > So perhaps better send it to Linus after 7.1-rc1?
> 
> [1] is in mm-hotfixes so it should get to mainline before 7.0 final, so then
> it's fine to add this to slab updates PR for 7.1-rc1

Sounds good, thanks!

> 
> > Thanks!
> > 
> >> [1] https://lore.kernel.org/linux-mm/20260330035941.518186-1-hao.li@xxxxxxxxx/
> > 
> 

-- 
Thanks,
Hao