Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT

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Subject: Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Date: Tue, 7 Jul 2020 11:27:07 +0200
Cc: Uladzislau Rezki <urezki@xxxxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxx>, rcu@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, kernel-team@xxxxxx, mingo@xxxxxxxxxx, jiangshanlai@xxxxxxxxx, dipankar@xxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, mathieu.desnoyers@xxxxxxxxxxxx, josh@xxxxxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, rostedt@xxxxxxxxxxx, dhowells@xxxxxxxxxx, edumazet@xxxxxxxxxx, fweisbec@xxxxxxxxx, oleg@xxxxxxxxxx
In-reply-to: <20200706202949.GB233429@google.com>

On 2020-07-06 16:29:49 [-0400], Joel Fernandes wrote:
> Anyway, I think as we discussed on IRC, your proposal will work for both
> kernels while allowing us to keep the internal lock as raw.

Why can't we use the migrate_disable() and spinlock_t?

> thanks,
> 
>  - Joel

Sebastian

References:
- [PATCH tip/core/rcu 0/17] kfree_rcu updates for v5.9
  - From: Paul E. McKenney
- [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
  - From: paulmck
- Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
  - From: Sebastian Andrzej Siewior
- Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
  - From: Paul E. McKenney
- Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
  - From: Sebastian Andrzej Siewior
- Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
  - From: Uladzislau Rezki
- Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
  - From: Joel Fernandes
- Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
  - From: Uladzislau Rezki
- Re: [PATCH tip/core/rcu 03/17] rcu/tree: Skip entry into the page allocator for PREEMPT_RT
  - From: Joel Fernandes

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