** Changed in: linux (Ubuntu Xenial)
Status: New => Triaged
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu Artful)
Assignee: Canonical Kernel Team (canonical-kernel-team) => Joseph
Salisbury (jsalisbury)
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https://bugs.launchpad.net/bugs/1747134
Title:
[bug] [BDX]Ubuntu 16.04.3 with kernel
"4.10.0-32-generic_4.10.0-32.36~16.04.1_amd64" hang if set "Cores
Enabled" to 2 for both CPU
Status in intel:
New
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Triaged
Status in linux source package in Artful:
Triaged
Status in linux source package in Bionic:
Fix Released
Bug description:
Description:
Customer report a Ubuntu kernel issue related to Intel BDX Core numbers
setting
Ubuntu 16.04.3 with kernel "4.10.0-32-generic_4.10.0-32.36~16.04.1_amd64"
hang if set "Cores Enabled" to 2 for both CPU.
We have reproduced this issue on 17.10 release.
With latest kernel, this issue disappears.
now we bisect this issue is fixed by commit 947134d9b00f
(“x86/smpboot: Do not use smp_num_siblings in __max_logical_packages
calculation”) which was merged in v4.15-rc4.
But after applying this commit to Ubuntu 16.04.3 kernel v4.13 code
base or Linux upstream mainline kernel v4.13 code base, this issue
still exists.
Target Release: 16.04 / 17.10
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