From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: 5.6-rc3: WARNING: CPU: 48 PID: 17435 at kernel/sched/fair.c:380 enqueue_task_fair+0x328/0x440
Date: Fri, 28 Feb 2020 13:04:24 +0100 [thread overview]
Message-ID: <afacbbd1-3d6b-c537-34e2-5b455e1c2267@de.ibm.com> (raw)
In-Reply-To: <ace7327f-0fd6-4f36-39ae-a8d7d1c7f06b@de.ibm.com>
I was able to reproduce this with 5.5.0
On 28.02.20 08:54, Christian Borntraeger wrote:
> Peter,
>
> it seems that your new assert did trigger for me:
>
> The system was running fine for 4 hours and then this happened.
> Unfortunately I have no idea if this reproduces and if so how.
>
> [15260.753944] ------------[ cut here ]------------
> [15260.753949] rq->tmp_alone_branch != &rq->leaf_cfs_rq_list
> [15260.753959] WARNING: CPU: 48 PID: 17435 at kernel/sched/fair.c:380 enqueue_task_fair+0x328/0x440
> [15260.753961] Modules linked in: kvm xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp xt_CT tun bridge stp llc xt_tcpudp ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink ip6table_filter ip6_tables iptable_filter rpcrdma sunrpc rdma_ucm rdma_cm iw_cm ib_cm configfs s390_trng mlx5_ib ghash_s390 prng ib_uverbs aes_s390 ib_core des_s390 libdes sha3_512_s390 genwqe_card vfio_ccw vfio_mdev sha3_256_s390 mdev crc_itu_t sha512_s390 vfio_iommu_type1 sha1_s390 vfio eadm_sch zcrypt_cex4 sch_fq_codel ip_tables x_tables mlx5_core sha256_s390 sha_common pkey zcrypt rng_core autofs4
> [15260.754002] CPU: 48 PID: 17435 Comm: cc1 Not tainted 5.6.0-rc3+ #24
> [15260.754004] Hardware name: IBM 3906 M04 704 (LPAR)
> [15260.754005] Krnl PSW : 0404c00180000000 0000000942282e3c (enqueue_task_fair+0x32c/0x440)
> [15260.754008] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3
> [15260.754010] Krnl GPRS: 00000000000003e0 0000001fbd60ee00 000000000000002d 00000009435347c2
> [15260.754012] 000000000000002c 00000009428ec950 0000000900000000 0000000000000001
> [15260.754013] 0000001fbd60ed00 0000001fbd60ed00 0000001fbd60ee00 0000000000000000
> [15260.754014] 0000001c633ea000 0000000942c34670 0000000942282e38 000003e00140baf8
> [15260.754066] Krnl Code: 0000000942282e2c: c020005d39d8 larl %r2,0000000942e2a1dc
> 0000000942282e32: c0e5fffdcc3f brasl %r14,000000094223c6b0
> #0000000942282e38: af000000 mc 0,0
> >0000000942282e3c: a7f4ff22 brc 15,0000000942282c80
> 0000000942282e40: 41b06340 la %r11,832(%r6)
> 0000000942282e44: e3d063480004 lg %r13,840(%r6)
> 0000000942282e4a: b904004b lgr %r4,%r11
> 0000000942282e4e: b904003d lgr %r3,%r13
> [15260.754080] Call Trace:
> [15260.754083] [<0000000942282e3c>] enqueue_task_fair+0x32c/0x440
> [15260.754085] ([<0000000942282e38>] enqueue_task_fair+0x328/0x440)
> [15260.754087] [<0000000942272d78>] activate_task+0x88/0xf0
> [15260.754088] [<00000009422732e8>] ttwu_do_activate+0x58/0x78
> [15260.754090] [<00000009422742ce>] try_to_wake_up+0x256/0x650
> [15260.754093] [<000000094229248e>] swake_up_locked.part.0+0x2e/0x70
> [15260.754095] [<00000009422927ac>] swake_up_one+0x54/0x88
> [15260.754151] [<000003ff8044c15a>] kvm_vcpu_wake_up+0x52/0x78 [kvm]
> [15260.754161] [<000003ff8046af02>] kvm_s390_vcpu_wakeup+0x2a/0x40 [kvm]
> [15260.754171] [<000003ff8046b68e>] kvm_s390_idle_wakeup+0x6e/0xa0 [kvm]
> [15260.754175] [<00000009422dd05c>] __hrtimer_run_queues+0x114/0x2f0
> [15260.754178] [<00000009422dddb4>] hrtimer_interrupt+0x12c/0x2a8
> [15260.754181] [<0000000942200d3c>] do_IRQ+0xac/0xb0
> [15260.754185] [<0000000942c25684>] ext_int_handler+0x130/0x134
> [15260.754186] Last Breaking-Event-Address:
> [15260.754189] [<000000094223c710>] __warn_printk+0x60/0x68
> [15260.754190] ---[ end trace e84a48be72a8b514 ]---
>
next prev parent reply other threads:[~2020-02-28 12:04 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 7:54 5.6-rc3: WARNING: CPU: 48 PID: 17435 at kernel/sched/fair.c:380 enqueue_task_fair+0x328/0x440 Christian Borntraeger
2020-02-28 12:04 ` Christian Borntraeger [this message]
2020-02-28 13:32 ` Vincent Guittot
2020-02-28 13:43 ` Christian Borntraeger
2020-02-28 15:08 ` Christian Borntraeger
2020-02-28 15:37 ` Vincent Guittot
2020-02-28 15:42 ` Christian Borntraeger
2020-02-28 16:32 ` Qais Yousef
2020-02-28 16:35 ` Vincent Guittot
2020-03-02 11:16 ` Christian Borntraeger
2020-03-02 18:17 ` Christian Borntraeger
2020-03-03 7:37 ` Christian Borntraeger
2020-03-03 7:55 ` Vincent Guittot
2020-03-04 15:26 ` Vincent Guittot
2020-03-04 17:42 ` Christian Borntraeger
2020-03-04 17:51 ` Vincent Guittot
2020-03-04 19:19 ` Dietmar Eggemann
2020-03-04 19:38 ` Christian Borntraeger
2020-03-04 19:59 ` Christian Borntraeger
2020-03-05 9:30 ` Vincent Guittot
2020-03-05 11:28 ` Christian Borntraeger
2020-03-05 12:12 ` Dietmar Eggemann
2020-03-05 12:33 ` Vincent Guittot
2020-03-05 12:48 ` Christian Borntraeger
2020-03-05 13:02 ` Vincent Guittot
2020-03-05 13:18 ` Christian Borntraeger
2020-03-05 12:14 ` Vincent Guittot
2020-03-05 11:54 ` Dietmar Eggemann
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=afacbbd1-3d6b-c537-34e2-5b455e1c2267@de.ibm.com \
--to=borntraeger@de.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.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