From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 14 Feb 2022 12:24:03 +0000
Subject: Re: [PATCH 7/8] kernel/fork: Only cache the VMAP stack in finish_task_switch().
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To: Andy Lutomirski <luto@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, Ben Segall <bsegall@google.com>, Daniel Bristot de Oliveira <bristot@redhat.com>, Dietmar Eggemann <dietmar.eggemann@arm.com>, Ingo Molnar <mingo@redhat.com>, Juri Lelli <juri.lelli@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Steven Rostedt <rostedt@goodmis.org>, Thomas Gleixner <tglx@linutronix.de>, Vincent Guittot <vincent.guittot@linaro.org>

On 2022-02-14 13:10:06 [+0100], To Andy Lutomirski wrote:
> 
> I think I could use the first few bytes of the stack as a RCU-head. Let
> me try that.

task::stack_vm_area and ::stack. Now I remember why I went for that bit.
But I do have (hopefully) a better idea now.

> > --Andy

Sebastian