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Message-Id: <210C013C-AB14-45BC-AB2E-199FF7F5E523@linux.dev>
Date: Tue, 25 Jul 2023 11:17:24 +0800
From: Muchun Song <muchun.song@...ux.dev>
To: Qi Zheng <zhengqi.arch@...edance.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 david@...morbit.com,
 tkhai@...ru,
 Vlastimil Babka <vbabka@...e.cz>,
 Roman Gushchin <roman.gushchin@...ux.dev>,
 djwong@...nel.org,
 Christian Brauner <brauner@...nel.org>,
 "Paul E. McKenney" <paulmck@...nel.org>,
 tytso@....edu,
 steven.price@....com,
 cel@...nel.org,
 Sergey Senozhatsky <senozhatsky@...omium.org>,
 yujie.liu@...el.com,
 Greg KH <gregkh@...uxfoundation.org>,
 LKML <linux-kernel@...r.kernel.org>,
 Linux Memory Management List <linux-mm@...ck.org>,
 x86@...nel.org,
 kvm@...r.kernel.org,
 xen-devel@...ts.xenproject.org,
 linux-erofs@...ts.ozlabs.org,
 linux-f2fs-devel@...ts.sourceforge.net,
 cluster-devel@...hat.com,
 linux-nfs@...r.kernel.org,
 linux-mtd@...ts.infradead.org,
 rcu@...r.kernel.org,
 netdev <netdev@...r.kernel.org>,
 dri-devel@...ts.freedesktop.org,
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 dm-devel@...hat.com,
 linux-raid@...r.kernel.org,
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Subject: Re: [PATCH v2 02/47] mm: shrinker: remove redundant shrinker_rwsem in
 debugfs operations



> On Jul 24, 2023, at 17:43, Qi Zheng <zhengqi.arch@...edance.com> wrote:
> 
> The debugfs_remove_recursive() will wait for debugfs_file_put() to return,
> so the shrinker will not be freed when doing debugfs operations (such as
> shrinker_debugfs_count_show() and shrinker_debugfs_scan_write()), so there
> is no need to hold shrinker_rwsem during debugfs operations.
> 
> Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>

Reviewed-by: Muchun Song <songmuchun@...edance.com>

Thanks.



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