From: SJ Park <sj@kernel.org>
To: Ye Liu <ye.liu@linux.dev>
Cc: SJ Park <sj@kernel.org>, Miaohe Lin <linmiaohe@huawei.com>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.com>,
peterz@infradead.org, paulmck@kernel.org, mingo@redhat.com,
rostedt@goodmis.org, jpoimboe@kernel.org, mic@digikod.net,
oleg@redhat.com, tglx@kernel.org, david@kernel.org,
nao.horiguchi@gmail.com, rafael@kernel.org, gnoack3000@gmail.com,
ljs@kernel.org, rientjes@google.com, shakeel.butt@linux.dev,
xu.xin16@zte.com.cn, chengming.zhou@linux.dev, will@kernel.org,
boqun@kernel.org, frederic@kernel.org,
neeraj.upadhyay@kernel.org, joelagnelf@nvidia.com,
josh@joshtriplett.org, urezki@gmail.com, juri.lelli@redhat.com,
vincent.guittot@linaro.org, tony.luck@intel.com,
reinette.chatre@intel.com, x86@kernel.org, paul@paul-moore.com,
jmorris@namei.org, serge@hallyn.com, pavel@kernel.org,
lance.yang@linux.dev, mhiramat@kernel.org, pmladek@suse.com,
longman@redhat.com, mathieu.desnoyers@efficios.com,
jiangshanlai@gmail.com, qiang.zhang@linux.dev,
dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de,
vschneid@redhat.com, kprateek.nayak@amd.com,
mark.rutland@arm.com, Dave.Martin@arm.com, james.morse@arm.com,
babu.moger@amd.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
rcu@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org,
linux-security-module@vger.kernel.org
Subject: Re: [PATCH v2 4/8] mm/memory-failure: convert process iterator to for_each_process_rculock
Date: Mon, 7 Sep 2026 14:24:57 -0700 [thread overview]
Message-ID: <20260907212457.88243-1-sj@kernel.org> (raw)
In-Reply-To: <20260907081334.1152889-5-ye.liu@linux.dev>
On Mon, 7 Sep 2026 16:13:30 +0800 Ye Liu <ye.liu@linux.dev> wrote:
> From: Ye Liu <liuye@kylinos.cn>
>
> Replace the manual rcu_read_lock()/rcu_read_unlock() pairs combined
> with for_each_process() loop in mm/memory-failure.c with
> for_each_process_rculock(), which scopes the RCU read lock to the
> loop body via scoped_guard(rcu).
>
> In collect_procs_file(), the page_pgoff() call now falls outside the
> RCU read-side critical section. This is safe because page_pgoff()
> only reads folio->index and does not traverse any RCU-protected
> structures.
Thank you for clarifying :)
>
> Signed-off-by: Ye Liu <liuye@kylinos.cn>
> Acked-by: Michal Hocko <mhocko@suse.com>
> Acked-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: SJ Park <sj@kernel.org>
Thanks,
SJ
[...]
next prev parent reply other threads:[~2026-09-07 21:25 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-07 8:13 [PATCH v2 0/8] sched: introduce for_each_process_rculock and for_each_thread_rculock Ye Liu
2026-09-07 8:13 ` [PATCH v2 1/8] " Ye Liu
2026-09-07 8:30 ` Lorenzo Stoakes (ARM)
2026-09-07 9:35 ` Oleg Nesterov
2026-09-07 15:42 ` Gregory Price
2026-09-07 21:20 ` SJ Park
2026-09-07 8:13 ` [PATCH v2 2/8] mm/oom_kill: convert process/thread iterators to for_each_*_rculock Ye Liu
2026-09-07 8:35 ` Lorenzo Stoakes (ARM)
2026-09-07 15:42 ` Gregory Price
2026-09-07 8:13 ` [PATCH v2 3/8] mm/ksm: convert process iterator to for_each_process_rculock Ye Liu
2026-09-07 8:36 ` Lorenzo Stoakes (ARM)
2026-09-07 15:43 ` Gregory Price
2026-09-07 8:13 ` [PATCH v2 4/8] mm/memory-failure: " Ye Liu
2026-09-07 11:05 ` Lorenzo Stoakes (ARM)
2026-09-07 15:43 ` Gregory Price
2026-09-07 21:24 ` SJ Park [this message]
2026-09-07 8:13 ` [PATCH v2 5/8] kernel: convert process/thread iterators to for_each_*_rculock Ye Liu
2026-09-07 12:20 ` Lorenzo Stoakes (ARM)
2026-09-07 15:53 ` Gregory Price
2026-09-07 17:57 ` Oleg Nesterov
2026-09-07 21:05 ` Gregory Price
2026-09-07 21:54 ` Oleg Nesterov
2026-09-07 22:27 ` Gregory Price
2026-09-07 22:44 ` Oleg Nesterov
2026-09-07 21:28 ` SJ Park
2026-09-07 8:13 ` [PATCH v2 6/8] fs: " Ye Liu
2026-09-07 12:27 ` Lorenzo Stoakes (ARM)
2026-09-07 15:47 ` Gregory Price
2026-09-07 21:40 ` SJ Park
2026-09-07 8:13 ` [PATCH v2 7/8] lib: convert process iterator to for_each_process_rculock Ye Liu
2026-09-07 12:27 ` Lorenzo Stoakes (ARM)
2026-09-07 15:47 ` Gregory Price
2026-09-07 21:42 ` SJ Park
2026-09-07 8:13 ` [PATCH v2 8/8] security/landlock: convert thread iterator to for_each_thread_rculock Ye Liu
2026-09-07 12:28 ` Lorenzo Stoakes (ARM)
2026-09-07 15:49 ` Gregory Price
2026-09-07 21:44 ` SJ Park
2026-09-07 8:26 ` [PATCH v2 0/8] sched: introduce for_each_process_rculock and for_each_thread_rculock Lorenzo Stoakes (ARM)
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