According to #5: Please let us know when an updated fix becomes
available and upstream accepted - thx.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Changed in: ubuntu-z-systems
Status: Triaged => Confirmed
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https://bugs.launchpad.net/bugs/1718107
Title:
brk_near_huge test will hang on IBM s390x zKVM / zVM
Status in Ubuntu on IBM z Systems:
Confirmed
Status in linux package in Ubuntu:
Confirmed
Bug description:
This issue does not exist on other amd64 / i386 / arm64 boxes.
Steps:
1. Clone git://kernel.ubuntu.com/ubuntu/autotest-client-tests
2. Untar libhugetlbfs/libhugetlbfs-2.20.tar.gz
3. Run `sudo BUILDTYPE=NATIVEONLY make check` in the extracted
libhugetlbfs-2.20 directory
4. Hit Ctrl + C to terminate it
From the output you will see it get stuck:
truncate_above_4GB (1024K: 64): PASS
brk_near_huge (1024K: 64): brk_near_huge: malloc.c:2427: sysmalloc:
Assertion `(old_top == initial_top (av) && old_size == 0) || ((unsigned long)
(old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end &
(pagesize - 1)) == 0)' failed.
task-size-overrun (1024K: 64):
From the syslog you can see brk_near_huge has crashed:
Sep 19 07:28:25 s2lp6g004 rsyslogd-2007: action 'action 10' suspended, next
retry is Tue Sep 19 07:29:55 2017 [v8.16.0 try http://www.rsyslog.com/e/2007 ]
Sep 19 07:28:36 s2lp6g004 AutotestCrashHandler: Application brk_near_huge,
PID 10474 crashed
Sep 19 07:28:36 s2lp6g004 AutotestCrashHandler: Writing core files to
['/home/ubuntu/autotest/client/results/default/libhugetlbfs/debug/crash.brk_near_huge.10474']
Sep 19 07:28:36 s2lp6g004 AutotestCrashHandler: Could not determine from
which application core file
/home/ubuntu/autotest/client/results/default/libhugetlbfs/debug/crash.brk_near_huge.10474/core
is from
After hitting Ctrl + C to interrupt, kernel trace could be found in syslog:
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325504] report_user_fault: 35
callbacks suppressed
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325507] User process fault:
interruption code 0010 ilc:3 in stack_grow_into_huge[12f880000+4000]
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325520] Failing address:
000003ffe72fe000 TEID: 000003ffe72fe400
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325521] Fault in primary space mode
while using user ASCE.
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325523] AS:00000000551701c7
R3:0000000048d88007 S:0000000000000020
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325527] CPU: 0 PID: 10481 Comm:
stack_grow_into Tainted: P D O 4.13.0-11-generic #12-Ubuntu
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325527] Hardware name: IBM 2964 N63
400 (KVM/Linux)
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325528] task: 0000000062450000
task.stack: 0000000062b3c000
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325529] User PSW : 0705300180000000
000000012f8819a8
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325530] R:0 T:1 IO:1 EX:1
Key:0 M:1 W:0 P:1 AS:0 CC:3 PM:0 RI:0 EA:3
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325531] User GPRS: 000002001c51e2f8
fffffffffffff000 0000000000000000 0000000000000004
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325531] 000003fff72fe5c0
0000000000000000 0000000000000003 0000000157806000
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325532] fffffffffff00000
0000000000100000 000003fff7000000 000003fff72fe520
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325532] 000002001c426000
0000000000000003 000000012f8819a2 000003ffe72fe518
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325540] User Code: 000000012f881996:
e548b0a80001 mvghi 168(%r11),1
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325540] 000000012f88199c:
c0e5fffffc86 brasl %r14,12f8812a8
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325540] #000000012f8819a2:
c2f410000008 slgfi %r15,268435464
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325540] >000000012f8819a8:
e54cf0a00001 mvhi 160(%r15),1
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325540] 000000012f8819ae:
4110f0a0 la %r1,160(%r15)
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325540] 000000012f8819b2:
ec1afff8a065 clgrj %r1,%r10,10,12f8819a2
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325540] 000000012f8819b8:
b24f0010 ear %r1,%a0
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325540] 000000012f8819bc:
eb110020000d sllg %r1,%r1,32
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325549] Last Breaking-Event-Address:
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325552] [<000002001c7f26e8>]
0x2001c7f26e8
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325562] Process
10481(stack_grow_into) has RLIMIT_CORE set to 1
Sep 19 07:30:02 s2lp6g004 kernel: [11224.325563] Aborting core
Please find attachment for a more detailed syslog and core dump file.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-11-generic 4.13.0-11.12
ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1
Uname: Linux 4.13.0-11-generic s390x
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.7-0ubuntu1
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
CurrentDmesg:
Date: Tue Sep 19 07:16:55 2017
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
PciMultimedia:
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C
SHELL=/bin/bash
ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
ProcKernelCmdLine: root=UUID=d86dc8de-6ac8-4e4b-aba8-92872a209a8c
crashkernel=196M
RelatedPackageVersions:
linux-restricted-modules-4.13.0-11-generic N/A
linux-backports-modules-4.13.0-11-generic N/A
linux-firmware 1.168
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
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