linux-kernel - Re: [PATCH v3] KVM: Move VM's worker kthreads back to the original cgroup before exiting.

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Message-ID: <70cc45dc-c1e3-9ad4-92c2-f6305b8e8574@redhat.com>
Date:   Sat, 19 Feb 2022 08:55:35 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     kernel test robot <lkp@...el.com>,
        Vipin Sharma <vipinsh@...gle.com>, kbuild-all@...ts.01.org,
        mkoutny@...e.com, tj@...nel.org, lizefan.x@...edance.com,
        hannes@...xchg.org, dmatlack@...gle.com, jiangshanlai@...il.com,
        kvm@...r.kernel.org, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] KVM: Move VM's worker kthreads back to the original
 cgroup before exiting.

On 2/19/22 01:30, Sean Christopherson wrote:
> 
> So I think this can be:
> 
> 	rcu_read_lock();
> 	parent = rcu_dereference(current->real_parent);
> 	get_task_struct(parent);
> 	rcu_read_unlock();
> 
> 	(void)cgroup_attach_task_all(parent, current);
>          put_task_struct(parent);

Yes, I agree.

Paolo