<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Mon, Dec 11, 2017 at 4:52 PM, Adi Pircalabu <span dir="ltr"><<a href="mailto:adi@ddns.com.au" target="_blank">adi@ddns.com.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Has anyone seen this recently? I couldn't replicate it on:<br>
- CentOS 6 running kernel-2.6.32-696.16.1.el6.x86<wbr>_64, kernel-lt-4.4.105-1.el6.elrepo<wbr>.x86_64<br>
- CentOS 7 running 4.9.67-1.el7.centos.x86_64<br>
<br>
But I can replicate it consistently running "xl -v vcpu-set <domU> <val>" on:<br>
- CentOS 6 running 4.14.5-1.el6.elrepo.x86_64<br>
- CentOS 7 running 4.14.5-1.el7.elrepo.x86_64<br>
<br>
dom0 versions tested with similar results in the domU:<br>
- 4.6.6-6.el7 on kernel 4.9.63-29.el7.x86_64<br>
- 4.6.3-15.el6 on kernel 4.9.37-29.el6.x86_64<br>
<br>
Noticed behaviour:<br>
- These commands stall:<br>
top<br>
ls -l /var/tmp<br>
ls -l /tmp<br>
- Stuck in D state on the CentOS 7 domU:<br>
root 5 0.0 0.0 0 0 ? D 11:20 0:00 [kworker/u8:0]<br>
root 316 0.0 0.0 0 0 ? D 11:20 0:00 [jbd2/xvda1-8]<br>
root 1145 0.0 0.2 116636 4776 ? Ds 11:20 0:00 -bash<br>
root 1289 0.0 0.1 25852 2420 ? Ds 11:35 0:00 /usr/bin/systemd-tmpfiles --clean<br>
root 1290 0.0 0.1 125248 2696 pts/1 D+ 11:44 0:00 ls --color=auto -l /tmp/<br>
root 1293 0.0 0.1 125248 2568 pts/2 D+ 11:44 0:00 ls --color=auto -l /var/tmp<br>
root 1296 0.0 0.2 116636 4908 pts/3 Ds+ 11:44 0:00 -bash<br>
root 1358 0.0 0.1 125248 2612 pts/4 D+ 11:47 0:00 ls --color=auto -l /var/tmp<br>
<br>
At a first glance it appears the issue is in 4.14.5 kernel. Stack traces follow:<br><span class="gmail-HOEnZb"><font color="#888888"><br>
Adi Pircalabu</font></span></blockquote><div> </div></div><div style="font-family:monospace,monospace;display:inline" class="gmail_default">Can you test-install 4.15-rcX</div> <div style="font-family:monospace,monospace;display:inline" class="gmail_default"> to see if the problem persists in the latest kernel?:<br><br><a href="http://elrepo.org/people/ajb/devel/kernel-ml/el7/x86_64/RPMS/" target="_blank">http://elrepo.org/people/ajb/<wbr>devel/kernel-ml/el7/x86_64/<wbr>RPMS/</a><br><br></div><div style="font-family:monospace,monospace;display:inline" class="gmail_default">Akemi<br></div></div></div>