From: Rick Warner <rick@microway.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [bisected] rcu_sched detected stalls - 4.15 or newer kernel with some Xeon skylake CPUs and extended APIC
Date: Thu, 17 May 2018 11:59:42 -0400 [thread overview]
Message-ID: <df100e7c-ffd9-5afe-41c2-fb00f43bc255@microway.com> (raw)
In-Reply-To: <alpine.DEB.2.21.1805171418210.1947@nanos.tec.linutronix.de>
Success!
This resolved the issue. Thanks Thomas!
Rick
On 05/17/18 08:36, Thomas Gleixner wrote:
> Rick,
>
> On Wed, 16 May 2018, Rick Warner wrote:
>
>> I've attached the dmesg output with the kernel parameter and supplied patch.
> Thanks for providing the data. I think I know what's wrong here. Does the
> patch below fix your problem?
>
> While you test, I go looking for a big brown paperbag.
>
> Thanks,
>
> tglx
>
> 8<----------------
>
> --- a/arch/x86/kernel/apic/x2apic_cluster.c
> +++ b/arch/x86/kernel/apic/x2apic_cluster.c
> @@ -124,6 +124,7 @@ static void init_x2apic_ldr(void)
> goto update;
> }
> cmsk = cluster_hotplug_mask;
> + cmsk->clusterid = cluster;
> cluster_hotplug_mask = NULL;
> update:
> this_cpu_write(cluster_masks, cmsk);
next prev parent reply other threads:[~2018-05-17 15:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-01 16:37 stall/hang on 4.15 " Rick Warner
2018-05-15 16:07 ` [bisected] rcu_sched detected stalls - 4.15 or newer " Rick Warner
2018-05-15 20:19 ` Thomas Gleixner
2018-05-16 14:50 ` Thomas Gleixner
2018-05-16 23:02 ` Rick Warner
2018-05-17 12:36 ` Thomas Gleixner
2018-05-17 15:59 ` Rick Warner [this message]
2018-05-17 19:03 ` [tip:x86/urgent] x86/apic/x2apic: Initialize cluster ID properly tip-bot for Thomas Gleixner
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=df100e7c-ffd9-5afe-41c2-fb00f43bc255@microway.com \
--to=rick@microway.com \
--cc=linux-kernel@vger.kernel.org \
--cc=tglx@linutronix.de \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®