This fix has already been applied as part of upstream stable release
4.10.4. It is included in the 4.10.0-15.17 kernel for zesty which is
currently in the canonical-kernel-team PPA.
** Also affects: linux (Ubuntu Zesty)
Importance: High
Assignee: Canonical Kernel Team (canonical-kernel-team)
Status: Triaged
** Changed in: linux (Ubuntu Zesty)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu Zesty)
Assignee: Canonical Kernel Team (canonical-kernel-team) => Seth Forshee
(sforshee)
** Changed in: linux (Ubuntu Zesty)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1675624
Title:
ubuntu 17.04: hw-breakpoint in kernel-sapce not working
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Zesty:
Fix Committed
Bug description:
How to reproduce:
$ sudo cat /proc/kallsyms | grep pid_max
c000000001308794 D pid_max
$ sudo perf record -a --event=mem:0xc000000001308794 sleep 10
$ dmesg
[ 99.095475] Unable to handle hardware breakpoint. Breakpoint at
0xc000000001308794 will be disabled.
[ 99.095478] ------------[ cut here ]------------
[ 99.095480] WARNING: CPU: 27 PID: 3306 at
/build/linux-VtwHOM/linux-4.10.0/arch/powerpc/kernel/hw_breakpoint.c:277
hw_breakpoint_handler+0x120/0x230
...
System detail:
$ uname -a
Linux tul163-u1704-qemu 4.10.0-13-generic #15-Ubuntu SMP Thu Mar 9 20:27:28
UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
$ cat /etc/*release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=17.04
DISTRIB_CODENAME=zesty
DISTRIB_DESCRIPTION="Ubuntu Zesty Zapus (development branch)"
== Comment: #1 - Ravikumar B. Bangoria <[email protected]> -
2017-03-22 04:29:24 ==
https://patchwork.ozlabs.org/patch/727837/ will solve this issue.
== Comment: #2 - SEETEENA THOUFEEK <[email protected]> - 2017-03-23
01:14:58 ==
Patch is accepted upstream.
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=e148bd17f48bd17fca2f4f089ec879
I had build kernel package with the patch included and tested and it is
working perfect.
link to the backport kernel debian package is uploaded in box note
https://ibm.ent.box.com/folder/22186913949 under the folder name
152781
== Comment: #3 - SEETEENA THOUFEEK <[email protected]> - 2017-03-23
01:17:02 ==
== Comment: #4 - SEETEENA THOUFEEK <[email protected]> - 2017-03-23
02:17:04 ==
Backported patch and kernel debian package with patch provided.
== Comment: #5 - SEETEENA THOUFEEK <[email protected]> - 2017-03-23
02:17:52 ==
debian package is tested locally and verified.
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