linux-kernel - Re: [PATCH 1/8] mm: vmscan: move shrinker_debugfs_remove() before synchronize

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Message-ID: <20230531-notlage-ankommen-93022623b74b@brauner>
Date:   Wed, 31 May 2023 12:49:33 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Qi Zheng <qi.zheng@...ux.dev>
Cc:     akpm@...ux-foundation.org, tkhai@...ru, roman.gushchin@...ux.dev,
        vbabka@...e.cz, viro@...iv.linux.org.uk, djwong@...nel.org,
        hughd@...gle.com, paulmck@...nel.org, muchun.song@...ux.dev,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Qi Zheng <zhengqi.arch@...edance.com>
Subject: Re: [PATCH 1/8] mm: vmscan: move shrinker_debugfs_remove() before
 synchronize_srcu()

On Wed, May 31, 2023 at 09:57:35AM +0000, Qi Zheng wrote:
> From: Qi Zheng <zhengqi.arch@...edance.com>
> 
> The debugfs_remove_recursive() will wait for debugfs_file_put()
> to return, so there is no need to put it after synchronize_srcu()
> to wait for the rcu read-side critical section to exit.
> 
> Just move it before synchronize_srcu(), which is also convenient
> to put the heavy synchronize_srcu() in the delayed work later.
> 
> Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
> ---

Afaict, should be a patch independent of this series.