FYI, we noticed the following commit:

https://github.com/0day-ci/linux Andrey-Vagin/fs-allow-to-use-dirfd-as-root-for-openat-and-other-at-syscalls/20160618-043537
commit 5368104fdbcf6c4ede18362cc8d3f113c22f6523 ("fs: allow to use dirfd as root for openat and other *at syscalls")

in testcase: aim7
with following parameters: load=1000/test=sync_disk_cp

on test machine: lkp-a05: Atom with 8G memory

caused below changes:


sync_disk_cp (2): cannot create /fs/shm/tmpb.0153300000
sync_disk_cp (2): cannot create /fs/shm/tmpb.0153200000
disk1.c: No such file or directory
disk1.c: No such file or directory

Child #999: : No such file or directory

Child #998: : No such file or directory

Failed to execute
        sync_disk_cp /fs/shm


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Xiaolong