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Date:   Sun, 16 Jun 2019 19:27:16 +0300
From:   Vladimir Davydov <vdavydov.dev@gmail.com>
To:     Roman Gushchin <guro@fb.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, kernel-team@fb.com,
        Johannes Weiner <hannes@cmpxchg.org>,
        Shakeel Butt <shakeelb@google.com>,
        Waiman Long <longman@redhat.com>
Subject: Re: [PATCH v7 07/10] mm: synchronize access to kmem_cache dying flag
 using a spinlock
Message-ID: <20190616162716.broxurphhmvdzy5s@esperanza>
References: <20190611231813.3148843-1-guro@fb.com>
 <20190611231813.3148843-8-guro@fb.com>
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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@fb.com>

Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>