Re: [PATCH v2] mm: vmalloc: fix vmap_purge_lock livelock under memory pressure

[Uladzislau Rezki]

On Mon, Aug 31, 2026 at 06:42:52PM -0700, Andrew Morton wrote:
> On Mon, 31 Aug 2026 11:54:22 +0200 Uladzislau Rezki <urezki@xxxxxxxxx> wrote:
> 
> > But, i think we can overt mutex_lock() into mutex_trylock() just only
> > in the:
> > 
> > static unsigned long
> > vmap_node_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
> > {
> > 	struct vmap_node *vn;
> > 
> > 	guard(mutex)(&vmap_purge_lock);
> > 	for_each_vmap_node(vn)
> > 		decay_va_pool_node(vn, true);
> > 
> > 	return SHRINK_STOP;
> > }
> 
> I *think* that means we can expect a v3.
> 
> Ho hum.  I guess I'll queue v2, under the assumption that my
> assumptions are usually wrong.
>
Yep :) 

--
Uladzislau Rezki