From: Peter Zijlstra <peterz@infradead.org>
To: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
longman@redhat.com, SRINIVAS <srinivas.eeda@oracle.com>
Subject: Re: Question about qspinlock nest
Date: Thu, 10 Jan 2019 21:03:03 +0100 [thread overview]
Message-ID: <20190110200303.GG2861@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <e784a592-5dec-b0b3-6c70-d9ef775621d5@oracle.com>
On Thu, Jan 10, 2019 at 04:02:53PM +0800, Zhenzhong Duan wrote:
> Hi Maintainer,
>
>
> There is a question confused me for days. Appreciate an answer.
>
> In below code, the comment says we never have more than 4 nested contexts.
>
> What happen if debug and mce exceptions nest with the four, or we ensure it
> never happen?
MCE and NMI really should not use spinlocks at all since they cannot be
masked.
next prev parent reply other threads:[~2019-01-10 20:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-10 8:02 Question about qspinlock nest Zhenzhong Duan
2019-01-10 14:43 ` Waiman Long
2019-01-10 18:25 ` James Morse
2019-01-10 19:23 ` Waiman Long
2019-01-10 20:12 ` Peter Zijlstra
2019-01-11 18:32 ` James Morse
2019-01-14 13:16 ` Peter Zijlstra
2019-01-14 13:54 ` James Morse
2019-01-14 21:07 ` Waiman Long
2019-01-18 10:02 ` Peter Zijlstra
2019-01-18 10:24 ` Borislav Petkov
2019-01-18 14:50 ` Waiman Long
2019-01-18 20:06 ` Peter Zijlstra
2019-01-18 21:30 ` Waiman Long
[not found] ` <2eca6f60-3e8b-a389-27cb-8adbd9676607@oracle.com>
2019-01-11 9:16 ` Peter Zijlstra
2019-01-11 17:36 ` Borislav Petkov
2019-01-11 16:59 ` Waiman Long
2019-01-10 20:03 ` Peter Zijlstra [this message]
2019-01-14 9:25 Zhenzhong Duan
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