linux-kernel - [lkp] [fs] 5368104fdb: stderr.sync_disk_cp (2): cannot create /fs/shm/tmpb.0153300000

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Date:	Wed, 22 Jun 2016 10:01:09 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Andrey Vagin <avagin@...nvz.org>
Cc:	0day robot <fengguang.wu@...el.com>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [fs]  5368104fdb: stderr.sync_disk_cp (2): cannot create
 /fs/shm/tmpb.0153300000


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

View attachment "config-4.7.0-rc3-00002-g5368104" of type "text/plain" (150917 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (21072 bytes)

View attachment "job.yaml" of type "text/plain" (2806 bytes)