Re: [PATCH 1/4] mm/migration: reduce the rcu lock duration

[Christoph Hellwig]

On Sat, Apr 09, 2022 at 03:38:43PM +0800, Miaohe Lin wrote:
> rcu_read_lock is required by grabbing the task refcount but it's not
> needed for ptrace_may_access. So we could release the rcu lock after
> task refcount is successfully grabbed to reduce the rcu holding time.
> 
> Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
> Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>

Looks good:

Reviewed-by: Christoph Hellwig <hch@xxxxxx>