Re: [PATCH v7 07/10] mm: synchronize access to kmem_cache dying flag using a spinlock

From: Vladimir Davydov
Date: Sun Jun 16 2019 - 12:32:17 EST

On Tue, Jun 11, 2019 at 04:18:10PM -0700, Roman Gushchin wrote:
> Currently the memcg_params.dying flag and the corresponding
> workqueue used for the asynchronous deactivation of kmem_caches
> is synchronized using the slab_mutex.
> It makes impossible to check this flag from the irq context,
> which will be required in order to implement asynchronous release
> of kmem_caches.
> So let's switch over to the irq-save flavor of the spinlock-based
> synchronization.
> Signed-off-by: Roman Gushchin <guro@xxxxxx>

Acked-by: Vladimir Davydov <>