linux-kernel - [PATCH 0/1] (Was: introduce for_each_process_thread

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Message-ID: <20160726185712.GA4088@redhat.com>
Date:	Tue, 26 Jul 2016 20:57:12 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>
Cc:	Dave Anderson <anderson@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Wang Shu <shuwang@...hat.com>, linux-kernel@...r.kernel.org,
	Tejun Heo <tj@...nel.org>, Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 0/1] (Was: introduce
 for_each_process_thread_{break,continue}() helpers)

On 07/25, Oleg Nesterov wrote:
>
> IMHO this makes sense in any case, but mostly this is preparation for
> another change: show_state_filter() should be preemptible. But this needs
> more discussion, I'll write another email/patch when I fully understand
> the hard-lockup caused by sysrq-t.

Yes, we need to do something with show_state_filter() anyway, I think.

OTOH, I believe this simple change in multi_cpu_stop() makes sense too
regardless.

Oleg.