Message-ID: <96f34c88-ca9a-1c3c-e02a-7c5cd1a269e4@suse.cz>
Date:   Thu, 9 Mar 2023 10:39:11 +0100
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Subject: Re: [PATCH v4 5/8] mm: shrinkers: make count and scan in shrinker
 debugfs lockless
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To:     Qi Zheng <zhengqi.arch@bytedance.com>, akpm@linux-foundation.org,
        tkhai@ya.ru, hannes@cmpxchg.org, shakeelb@google.com,
        mhocko@kernel.org, roman.gushchin@linux.dev, muchun.song@linux.dev,
        david@redhat.com, shy828301@gmail.com, rppt@kernel.org
Cc:     sultan@kerneltoast.com, dave@stgolabs.net,
        penguin-kernel@I-love.SAKURA.ne.jp, paulmck@kernel.org,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org
References: <20230307065605.58209-1-zhengqi.arch@bytedance.com>
 <20230307065605.58209-6-zhengqi.arch@bytedance.com>
From:   Vlastimil Babka <vbabka@suse.cz>
In-Reply-To: <20230307065605.58209-6-zhengqi.arch@bytedance.com>
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On 3/7/23 07:56, Qi Zheng wrote:
> Like global and memcg slab shrink, also use SRCU to
> make count and scan operations in memory shrinker
> debugfs lockless.
> 
> Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
> ---
>  mm/shrinker_debug.c | 24 +++++++-----------------
>  1 file changed, 7 insertions(+), 17 deletions(-)
> 
> diff --git a/mm/shrinker_debug.c b/mm/shrinker_debug.c
> index 39c3491e28a3..6aa7a7ec69da 100644
> --- a/mm/shrinker_debug.c
> +++ b/mm/shrinker_debug.c

Forgot to mention that this file should now likely also #include <linux/srcu.h>

> @@ -9,6 +9,7 @@
>  /* defined in vmscan.c */
>  extern struct rw_semaphore shrinker_rwsem;
>  extern struct list_head shrinker_list;
> +extern struct srcu_struct shrinker_srcu;