Leann,
While the problem is in ppc64-cpu command, it appears the fix is in a
set of kernel patches. Can you have the kernel team take a look at
these. Thanks.
Michael
On 02/07/2017 01:05 PM, Steve Langasek wrote:
> On Tue, Feb 07, 2017 at 12:42:39PM -0800, Michael Hohnbaum wrote:
>> Can Foundations take a look at this request, please.
> The bug is assigned to the linux package, so the kernel team should probably
> be looking at it.
>
--
Michael Hohnbaum
OIL Program Manager
Power (ppc64el) Development Project Manager
Canonical, Ltd.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1662666
Title:
ISST-LTE:pNV: ppc64_cpu command is hung w HDs, SSDs and NVMe
Status in linux package in Ubuntu:
New
Bug description:
-- Problem Description --
The following upstream patches are needed for Ubuntu to fix a hang situation
reported when executing ppc64_cpu --smt=on that occurs with various disk types.
We need whichever ones have not yet been pulled into the base.
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e57690fe009b2ab0cee8a57f53be634540e49c9d
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0e87e58bf60edb6bb28e493c7a143f41b091a5e5
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=135e8c9250dd5c8c9aae5984fde6f230d0cbfeaf
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c02ebfdddbafa9a6a0f52fbd715e6bfa229af9d3
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d1b1cea1e58477dad88ff769f54c0d2dfa56d923
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=36e1f3d107867b25c616c2fd294f5a1c9d4e5d09
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=71f79fb3179e69b0c1448a2101a866d871c66e7f
The hang problem can be reproduced with the following shell script
using an NVMe device executed on kernel versions 4.4.0-45 and 4.4.0-59
within 30 minutes. It was also reproduced on a 4.8.0-32-generic
kernel, although it took over 3 hours to manifest.
#!/bin/bash
if [[ ${#} -eq 0 ]]; then
${0} breaker &
while true; do
dd if=/dev/nvme0n1 bs=1024k of=/dev/null
done
elif [[ ${1} == "breaker" ]]; then
while true; do
ppc64_cpu --smt=off
sleep 5
ppc64_cpu --smt=on
sleep 5
done
fi
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1662666/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
