netdev - Re: [PATCH net v3 0/3] Fix Qdisc destroy issues caused by adding fine-grained locking to filter API

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Message-ID: <CAM_iQpXO9DG97beUocBuatzZr6+Kha0mQFpA+yFP6yz1R=WWCg@mail.gmail.com>
Date:   Tue, 24 Sep 2019 09:42:36 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Vlad Buslov <vladbu@...lanox.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Pirko <jiri@...nulli.us>,
        David Miller <davem@...emloft.net>
Subject: Re: [PATCH net v3 0/3] Fix Qdisc destroy issues caused by adding
 fine-grained locking to filter API

On Tue, Sep 24, 2019 at 8:51 AM Vlad Buslov <vladbu@...lanox.com> wrote:
>
> TC filter API unlocking introduced several new fine-grained locks. The
> change caused sleeping-while-atomic BUGs in several Qdiscs that call cls
> APIs which need to obtain new mutex while holding sch tree spinlock. This
> series fixes affected Qdiscs by ensuring that cls API that became sleeping
> is only called outside of sch tree lock critical section.
>
> Vlad Buslov (3):
>   net: sched: sch_htb: don't call qdisc_put() while holding tree lock
>   net: sched: multiq: don't call qdisc_put() while holding tree lock
>   net: sched: sch_sfb: don't call qdisc_put() while holding tree lock
>

For the whole series:

Acked-by: Cong Wang <xiyou.wangcong@...il.com>

Thanks.