Trusty arm64 system will hang on libhugetlbfs shmoverride_linked test

[Po-Hsu Lin]

Steps:
1. Deploy an ARM64 system with Trusty
2. Install necessary packages
3. git clone --depth=1 -b next https://github.com/libhugetlbfs/libhugetlbfs.git
4. make BUILDTYPE=NATIVEONLY
5. execute the run_test.py in tests directory

Results:
 * you will see it stuck at shmoverride_linked test, no output for this test in syslog

truncate_reserve_wraparound (2M: 64): PASS
truncate_sigbus_versus_oom (2M: 64): PASS
get_huge_pages (2M: 64): PASS
shmoverride_linked (2M: 64):

This issue can be reproduced in 3.13.0-137 and 3.13.0-138 in proposed.
As we didn't run any regression-test on this node between 3.13.0-135 ~ 3.13.0-136 (this node was broken).

This test cannot be built on ARM64 before (till 3.13.0-133, we have changed to use the upstream repo since then) therefore I think this can be considered as not a regression.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-137-generic 3.13.0-137.186
ProcVersionSignature: User Name 3.13.0-137.186-generic 3.13.11-ckt39
Uname: Linux 3.13.0-137-generic aarch64
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: 2.14.1-0ubuntu3.27
Architecture: arm64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: Error: [Errno 2] No such file or directory: 'iw'
CurrentDmesg:

Date: Thu Dec 21 07:49:12 2017
IwConfig:
 lo no wireless extensions.

 enp1s0 no wireless extensions.

 enp1s0d1 no wireless extensions.
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
PciMultimedia:

ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:

ProcKernelCmdLine: console=ttyS0,9600n8r ro
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-137-generic N/A
 linux-backports-modules-3.13.0-137-generic N/A
 linux-firmware 1.127.24
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Sean Feole (sfeole)]

very old bug, with no action on it, marking bug as incomplete and will
close in 5 days if no update.

[Po-Hsu Lin (cypressyew)]

This is still valid,
http://10.246.72.4/test-results/3.13.0-158.208-generic/ms10-35-mcdivittB0-kernel__3.13.0-158.208__2018-09-12_11-15-00/libhugetlbfs/results/libhugetlbfs/debug/libhugetlbfs.DEBUG.html

You can see that this test will hang after:
get_huge_pages (2M: 64): PASS

[Po-Hsu Lin (cypressyew)]

With the libhugetlbfs updated recently, this will need to be revisited.

[Sean Feole (sfeole)]

I have not seen this occur on the -aws nitro backed arm64 instances. Giving that mcdivitt is EOL, killing off this bug.

07/09 11:08:48 DEBUG| utils:0153| [stdout] chunk-overcommit (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] alloc-instantiate-race shared (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] alloc-instantiate-race private (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] truncate_reserve_wraparound (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] truncate_sigbus_versus_oom (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] get_huge_pages (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] shmoverride_linked (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] HUGETLB_SHM=yes shmoverride_linked (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] shmoverride_linked_static (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] HUGETLB_SHM=yes shmoverride_linked_static (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] LD_PRELOAD=libhugetlbfs.so shmoverride_unlinked (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] LD_PRELOAD=libhugetlbfs.so HUGETLB_SHM=yes shmoverride_unlinked (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] quota.sh (2M: 64): PASS
07/09 11:08:48 DEBUG| utils:0153| [stdout] counters.sh (2M: 64): PASS
07/09 11:08:49 DEBUG| utils:0153| [stdout] mmap-gettest 10 20 (2M: 64): PASS
07/09 11:08:49 DEBUG| utils:0153| [stdout] mmap-cow 19 20 (2M: 64): PASS
07/09 11:08:49 DEBUG| utils:0153| [stdout] set shmmax limit to 41943040
07/09 11:08:50 DEBUG| utils:0153| [stdout] shm-fork 10 10 (2M: 64): PASS
07/09 11:08:50 DEBUG| utils:0153| [stdout] set shmmax limit to 41943040
07/09 11:08:52 DEBUG| utils:0153| [stdout] shm-fork 10 20 (2M: 64): PASS
07/09 11:08:52 DEBUG| utils:0153| [stdout] set shmmax limit to 41943040
07/09 11:08:52 DEBUG| utils:0153| [stdout] shm-getraw 20 /dev/full (2M: 64): PASS
07/09 11:09:18 DEBUG| utils:0153| [stdout] fallocate_stress.sh (2M: 64): PASS
07/09 11:09:18 DEBUG| utils:0153| [stdout] ********** TEST SUMMARY
07/09 11:09:18 DEBUG| utils:0153| [stdout] * 2M
07/09 11:09:18 DEBUG| utils:0153| [stdout] * 32-bit 64-bit
07/09 11:09:18 DEBUG| utils:0153| [stdout] * Total testcases: 0 113
07/09 11:09:18 DEBUG| utils:0153| [stdout] * Skipped: 0 0
07/09 11:09:18 DEBUG| utils:0153| [stdout] * PASS: 0 111
07/09 11:09:18 DEBUG| utils:0153| [stdout] * FAIL: 0 0
07/09 11:09:18 DEBUG| utils:0153| [stdout] * Killed by signal: 0 1
07/09 11:09:18 DEBUG| utils:0153| [stdout] * Bad configuration: 0 1
07/09 11:09:18 DEBUG| utils:0153| [stdout] * Expected FAIL: 0 0
07/09 11:09:18 DEBUG| utils:0153| [stdout] * Unexpected PASS: 0 0
07/09 11:09:18 DEBUG| utils:0153| [stdout] * Test not present: 0 0
07/09 11:09:18 DEBUG| utils:0153| [stdout] * Strange test result: 0 0 ...