From: Dave Hansen <dave.hansen@linux.intel.com>
To: Ingo Molnar <mingo@kernel.org>,
kernel test robot <fengguang.wu@intel.com>
Cc: LKP <lkp@01.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
wfg@linux.intel.com
Subject: Re: 2f47e7e19f ("x86/mm/kaiser: Use PCID feature to make user and .."): WARNING: CPU: 0 PID: 1 at mm/early_ioremap.c:114 __early_ioremap
Date: Mon, 27 Nov 2017 06:51:12 -0800 [thread overview]
Message-ID: <a60acd2a-213c-c731-4ad0-e9fb77456f7e@linux.intel.com> (raw)
In-Reply-To: <20171127101814.jsglrh7typy3pxxp@gmail.com>
On 11/27/2017 02:18 AM, Ingo Molnar wrote:
> Any ideas about this bug?
I suspect that it's not bisected perfectly. I did some testing with
that config and it pretty much boots or crashes randomly.
Booting in a VM on a CPU without PCID support gets crashes in early
userspace, which has tended to be a TLB flushing problem. I'll narrow
it down some more today.
next prev parent reply other threads:[~2017-11-27 14:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-26 11:49 2f47e7e19f ("x86/mm/kaiser: Use PCID feature to make user and .."): WARNING: CPU: 0 PID: 1 at mm/early_ioremap.c:114 __early_ioremap kernel test robot
2017-11-27 10:18 ` Ingo Molnar
2017-11-27 14:51 ` Dave Hansen [this message]
2017-11-27 18:03 ` Eduardo Valentin
2017-11-27 18:28 ` Dave Hansen
2017-11-27 19:08 ` Eduardo Valentin
2017-11-27 16:14 ` Dave Hansen
2017-11-27 22:13 ` Rafael J. Wysocki
2017-11-27 22:33 ` Rafael J. Wysocki
2017-11-28 1:22 ` Dave Hansen
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