Re: [PATCH] arch/*: Disable softirq stacks on PREEMPT_RT.

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To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH] arch/*: Disable softirq stacks on PREEMPT_RT.
From: Rolf Eike Beer <eike-kernel@xxxxxxxxx>
Date: Wed, 15 Jun 2022 09:05:17 +0200
Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, "David S. Miller" <davem@xxxxxxxxxxxxx>, "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Alexander Gordeev <agordeev@xxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, Helge Deller <deller@xxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Rich Felker <dalias@xxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, Sven Schnelle <svens@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Vasily Gorbik <gor@xxxxxxxxxxxxx>, Yoshinori Sato <ysato@xxxxxxxxxxxxx>
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Am 2022-06-15 08:57, schrieb Christoph Hellwig:

On Tue, Jun 14, 2022 at 08:18:14PM +0200, Sebastian Andrzej Siewiorwrote:
Disable the unused softirqs stacks on PREEMPT_RT to safe some memoryand
s/safe/save/


When we are at that point already:

ensure that do_softirq_own_stack() is not used bwcause it is not


s/bwcause/because/

References:
- [PATCH] arch/*: Disable softirq stacks on PREEMPT_RT.
  - From: Sebastian Andrzej Siewior
- Re: [PATCH] arch/*: Disable softirq stacks on PREEMPT_RT.
  - From: Christoph Hellwig

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