From: Sachin Sant <sachinp@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-next@vger.kernel.org
Cc: Tejun Heo <tj@kernel.org>, Roman Gushchin <guro@fb.com>,
Oleg Nesterov <oleg@redhat.com>
Subject: [next-20190507][powerpc] WARN kernel/cgroup/cgroup.c:6008 with LTP ptrace01 test case
Date: Wed, 8 May 2019 15:06:30 +0530 [thread overview]
Message-ID: <A8995C41-9A8F-468C-89B2-AB6E44C7EADC@linux.vnet.ibm.com> (raw)
While running LTP tests(specifically ptrace01) following WARNING is observed
on POWER8 LPAR running next-20190507 built using 4K page size.
[ 3969.979492] msgrcv04 (433) used greatest stack depth: 9328 bytes left
[ 3981.452911] madvise06 (515): drop_caches: 3
[ 4004.575752] WARNING: CPU: 5 PID: 721 at kernel/cgroup/cgroup.c:6008 cgroup_exit+0x2ac/0x2c0
[ 4004.575781] Modules linked in: overlay rpadlpar_io rpaphp iptable_mangle xt_MASQUERADE iptable_nat nf_nat xt_conntrack nf_conntrack nf_defrag_ipv4 ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc kvm iptable_filter pseries_rng rng_core vmx_crypto ip_tables x_tables autofs4 [last unloaded: dummy_del_mod]
[ 4004.575837] CPU: 5 PID: 721 Comm: ptrace01 Tainted: G O 5.1.0-next-20190507-autotest #1
[ 4004.575846] NIP: c000000001b3026c LR: c000000001b30054 CTR: c000000001c9f020
[ 4004.575855] REGS: c000000171fff840 TRAP: 0700 Tainted: G O (5.1.0-next-20190507-autotest)
[ 4004.575863] MSR: 800000010282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE,TM[E]> CR: 44004824 XER: 20000000
[ 4004.575885] CFAR: c000000001b30078 IRQMASK: 1
[ 4004.575885] GPR00: c000000001b30054 c000000171fffad0 c000000003938700 c00000027b02fa18
[ 4004.575885] GPR04: c00000027b02fa00 0000000000000000 c000000003ae8700 00000000001c180a
[ 4004.575885] GPR08: 0000000000000001 0000000000000001 c000000003ae8700 0000000000000001
[ 4004.575885] GPR12: 0000000000004400 c00000001ec7ea80 c000000003a4d670 0000000000000009
[ 4004.575885] GPR16: 0000000000000000 0000000000040100 00000000418004fc 0000000008430000
[ 4004.575885] GPR20: 0000000000000009 0000000000000001 c0000001715e9200 c00000016d8f4d00
[ 4004.575885] GPR24: c000000171fffd90 0000000000000100 c000000168692478 c000000171fffb98
[ 4004.575885] GPR28: c000000168692400 c00000016d8f4d00 c0000000036420d0 c00000027b02fa00
[ 4004.575958] NIP [c000000001b3026c] cgroup_exit+0x2ac/0x2c0
[ 4004.575966] LR [c000000001b30054] cgroup_exit+0x94/0x2c0
[ 4004.575972] Call Trace:
[ 4004.575979] [c000000171fffad0] [c000000001b30054] cgroup_exit+0x94/0x2c0 (unreliable)
[ 4004.575990] [c000000171fffb30] [c0000000019cea98] do_exit+0x878/0x1ae0
[ 4004.575999] [c000000171fffc00] [c0000000019cfe4c] do_group_exit+0xac/0x1d0
[ 4004.576009] [c000000171fffc40] [c0000000019ed00c] get_signal+0x2bc/0x11c0
[ 4004.576019] [c000000171fffd30] [c000000001867b14] do_notify_resume+0x384/0x900
[ 4004.576029] [c000000171fffe20] [c00000000183e844] ret_from_except_lite+0x70/0x74
[ 4004.576037] Instruction dump:
[ 4004.576043] 314a0001 7d40492d 40c2fff4 3d42001b e92a7288 39290001 f92a7288 4bfffe5c
[ 4004.576056] 3d42001b e92a7258 39290001 f92a7258 <0fe00000> 4bfffe0c 4be91e45 60000000
[ 4004.576071] ---[ end trace 82a1a7c19005ebd6 ]—
The WARN_ONCE was added by following commit
96b9c592def5 ("cgroup: get rid of cgroup_freezer_frozen_exit()”).
Reverting the patch helps avoid the warning.
Thanks
-Sachin
next reply other threads:[~2019-05-08 9:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-08 9:36 Sachin Sant [this message]
2019-05-08 23:23 ` [next-20190507][powerpc] WARN kernel/cgroup/cgroup.c:6008 with LTP ptrace01 test case Roman Gushchin
2019-05-09 6:05 ` Sachin Sant
2019-05-09 16:27 ` Roman Gushchin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=A8995C41-9A8F-468C-89B2-AB6E44C7EADC@linux.vnet.ibm.com \
--to=sachinp@linux.vnet.ibm.com \
--cc=guro@fb.com \
--cc=linux-next@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=oleg@redhat.com \
--cc=tj@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).