This is a test case issue, and the failure is a false positive. ecryptfs/tests/kernel/directory-concurrent/test.c hang_check() the parent uses select() to check to see if the child process has completed. The child process lets the parent know that its done by writing "EXIT" to a pipe. select() is non blocking while read() is blocking, so the select() would timeout after 30s if nothing was read from the pipe, this timeout state is used to detect a hang in rmdir/mkdir. But the test does not take into account of the fact that there is no guarantee that the the order of execution after a fork() will be child first and then parent. If the parent executes before the child, we hit these false positives.
The sync between parent and child can be achieved by calling wait(NULL) before select(), ie let the parent wait for the child state to change, but if there really is a hang in rmdir/mkdir the parent would hang indefinitely, and that would defeat the tests purpose of detecting hangs. I found that as a workaround, adding a sleep(1) after write() in the child helps with resolving this issue. I tested this multiple times successfully. -- 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/1765653 Title: directory-concurrent.sh.ext4 in ubuntu_ecryptfs failed on Atrful and Bionic ThunderX ARM64 Status in ubuntu-kernel-tests: New Status in linux package in Ubuntu: Triaged Status in linux source package in Artful: Won't Fix Status in linux source package in Bionic: Triaged Bug description: This directory-concurrent.sh.ext4 test will fail with 4.13 and 4.15 kernel on a ThunderX ARM64 node (passed on the other Moonshot node): Steps: 1. git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest-client-tests -b master-next 2. git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest 3. rm -fr autotest/client/tests 4. ln -sf ~/autotest-client-tests autotest/client/tests 5. AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local --verbose autotest/client/tests/ubuntu_ecryptfs/control Output: Running 'tests/run_one.sh -K -t directory-concurrent.sh -b 1000000 -D /mnt/image -l /mnt/lower -u /mnt/upper -f ext4' Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing mkdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang Timed out after 30 seconds doing rmdir() - possible eCryptfs hang directory-concurrent FAIL Test Summary: 0 passed 1 failed ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-17-generic 4.15.0-17.18 ProcVersionSignature: User Name 4.15.0-17.18-generic 4.15.17 Uname: Linux 4.15.0-17-generic aarch64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Apr 20 09:29 seq crw-rw---- 1 root audio 116, 33 Apr 20 09:29 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu5 Architecture: arm64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CurrentDmesg: Date: Fri Apr 20 09:40:05 2018 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: Cavium ThunderX CRB PciMultimedia: ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SHELL=/bin/bash ProcFB: 0 EFI VGA 1 astdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-17-generic root=UUID=ddcb8b36-6267-4392-a1f9-74d9203b742e ro acpi=force iommu.passthrough=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-17-generic N/A linux-backports-modules-4.15.0-17-generic N/A linux-firmware 1.173 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/12/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.11 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: To be filled by O.E.M. dmi.board.vendor: To be filled by O.E.M. dmi.board.version: To be filled by O.E.M. dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 0 dmi.chassis.vendor: Cavium dmi.chassis.version: To be filled by O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd12/12/2012:svnCavium:pnThunderXCRB:pvrTobefilledbyO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnCavium:ct0:cvrTobefilledbyO.E.M.: dmi.product.family: Default string dmi.product.name: ThunderX CRB dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Cavium To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1765653/+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
