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.
WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave.hansen@linux.intel.com>
To: lkp@lists.01.org
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>
[-- Attachment #1: Type: text/plain, Size: 373 bytes --]
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: 18+ 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
2017-11-26 11:49 ` kernel test robot
2017-11-27 10:18 ` Ingo Molnar
2017-11-27 10:18 ` Ingo Molnar
2017-11-27 14:51 ` Dave Hansen [this message]
2017-11-27 14:51 ` Dave Hansen
2017-11-27 18:03 ` Eduardo Valentin
2017-11-27 18:28 ` Dave Hansen
2017-11-27 18:28 ` Dave Hansen
2017-11-27 19:08 ` Eduardo Valentin
2017-11-27 16:14 ` Dave Hansen
2017-11-27 16:14 ` Dave Hansen
2017-11-27 22:13 ` Rafael J. Wysocki
2017-11-27 22:13 ` Rafael J. Wysocki
2017-11-27 22:33 ` Rafael J. Wysocki
2017-11-27 22:33 ` Rafael J. Wysocki
2017-11-28 1:22 ` Dave Hansen
2017-11-28 1:22 ` Dave Hansen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=a60acd2a-213c-c731-4ad0-e9fb77456f7e@linux.intel.com \
--to=dave.hansen@linux.intel.com \
--cc=fengguang.wu@intel.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lkp@01.org \
--cc=mingo@kernel.org \
--cc=tglx@linutronix.de \
--cc=wfg@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.