From: Frederic Weisbecker <frederic@kernel.org>
To: Zqiang <qiang1.zhang@intel.com>, Nicholas Piggin <npiggin@gmail.com>
Cc: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
paulmck@kernel.org, joel@joelfernandes.org, rcu@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] sched/isolation: Fix illegal CPU value by housekeeping_any_cpu() return
Date: Fri, 10 Feb 2023 01:39:01 +0100 [thread overview]
Message-ID: <Y+WSJRjlB4qDI1ul@lothringen> (raw)
In-Reply-To: <20230210000021.1007853-1-qiang1.zhang@intel.com>
Thanks for checking this!
On Fri, Feb 10, 2023 at 08:00:21AM +0800, Zqiang wrote:
> For kernels built with CONFIG_NO_HZ_FULL=y, running the following tests:
>
> runqemu kvm slirp nographic qemuparams="-m 1024 -smp 4" bootparams=
> "console=ttyS0 nohz_full=0,1 rcu_nocbs=0,1 sched_verbose" -d
Has this ever worked? Again I'm tempted to just:
git revert 08ae95f4fd3b38b257f5dc7e6507e071c27ba0d5
>
> root@qemux86-64:~# echo 0 > /sys/devices/system/cpu/cpu2/online
> root@qemux86-64:~# echo 0 > /sys/devices/system/cpu/cpu3/online
>
> [ 22.838290] BUG: unable to handle page fault for address: ffffffff84cd48c0
next prev parent reply other threads:[~2023-02-10 0:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-10 0:00 [PATCH v2] sched/isolation: Fix illegal CPU value by housekeeping_any_cpu() return Zqiang
2023-02-10 0:39 ` Frederic Weisbecker [this message]
2023-02-15 14:59 ` Joel Fernandes
2023-02-16 6:07 ` Zhang, Qiang1
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