Hi Stefan,

On Tue, Jun 28, 2016 at 1:46 PM, Stefan Priebe - Profihost AG
<s.pri...@profihost.ag> wrote:
> Please be aware that you may need even more patches. Overall this needs 3
> patches. Where the first two try to fix a bug and the 3rd one fixes the
> fixes + even more bugs related to the scheduler. I've no idea on which patch
> level Ubuntu is.

Stefan, would you be able to please point to the other two patches
beside https://lkml.org/lkml/diff/2016/6/22/102/1 ?

Thank you,
Alex

>
> Stefan
>
> Excuse my typo sent from my mobile phone.
>
> Am 28.06.2016 um 17:59 schrieb Tim Bishop <tim-li...@bishnet.net>:
>
> Yes - I noticed this today on Ubuntu 16.04 with the default kernel. No
> useful information to add other than it's not just you.
>
> Tim.
>
> On Tue, Jun 28, 2016 at 11:05:40AM -0400, Alex Gorbachev wrote:
>
> After upgrading to kernel 4.4.13 on Ubuntu, we are seeing a few of
>
> these issues where an OSD would fail with the stack below.  I logged a
>
> bug at https://bugzilla.kernel.org/show_bug.cgi?id=121101 and there is
>
> a similar description at https://lkml.org/lkml/2016/6/22/102, but the
>
> odd part is we have turned off CFQ and blk-mq/scsi-mq and are using
>
> just the noop scheduler.
>
>
> Does the ceph kernel code somehow use the fair scheduler code block?
>
>
> Thanks
>
> --
>
> Alex Gorbachev
>
> Storcium
>
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.684974] CPU: 30 PID:
>
> 10403 Comm: ceph-osd Not tainted 4.4.13-040413-generic #201606072354
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.684991] Hardware name:
>
> Supermicro X9DRi-LN4+/X9DR3-LN4+/X9DRi-LN4+/X9DR3-LN4+, BIOS 3.2
>
> 03/04/2015
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685009] task:
>
> ffff880f79df8000 ti: ffff880f79fb8000 task.ti: ffff880f79fb8000
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685024] RIP:
>
> 0010:[<ffffffff810b416e>]  [<ffffffff810b416e>]
>
> task_numa_find_cpu+0x22e/0x6f0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685051] RSP:
>
> 0018:ffff880f79fbb818  EFLAGS: 00010206
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685063] RAX:
>
> 0000000000000000 RBX: ffff880f79fbb8b8 RCX: 0000000000000000
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685076] RDX:
>
> 0000000000000000 RSI: 0000000000000000 RDI: ffff8810352d4800
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685107] RBP:
>
> ffff880f79fbb880 R08: 00000001020cf87c R09: 0000000000ff00ff
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685150] R10:
>
> 0000000000000009 R11: 0000000000000006 R12: ffff8807c3adc4c0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685194] R13:
>
> 0000000000000006 R14: 000000000000033e R15: fffffffffffffec7
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685238] FS:
>
> 00007f30e46b8700(0000) GS:ffff88105f580000(0000)
>
> knlGS:0000000000000000
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685283] CS:  0010 DS:
>
> 0000 ES: 0000 CR0: 0000000080050033
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685310] CR2:
>
> 000000001321a000 CR3: 0000000853598000 CR4: 00000000000406e0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685354] Stack:
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685374]
>
> ffffffff813d050f 000000000000000d 0000000000000045 ffff880f79df8000
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685426]
>
> 000000000000033f 0000000000000000 0000000000016b00 000000000000033f
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685477]
>
> ffff880f79df8000 ffff880f79fbb8b8 00000000000001f4 0000000000000054
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685528] Call Trace:
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685555]
>
> [<ffffffff813d050f>] ? cpumask_next_and+0x2f/0x40
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685584]
>
> [<ffffffff810b4a6e>] task_numa_migrate+0x43e/0x9b0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685613]
>
> [<ffffffff810b3acc>] ? update_cfs_shares+0xbc/0x100
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685642]
>
> [<ffffffff810b5059>] numa_migrate_preferred+0x79/0x80
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685672]
>
> [<ffffffff810b9b94>] task_numa_fault+0x7f4/0xd40
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685700]
>
> [<ffffffff813d9634>] ? timerqueue_del+0x24/0x70
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685729]
>
> [<ffffffff810b9205>] ? should_numa_migrate_memory+0x55/0x130
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685762]
>
> [<ffffffff811bd590>] handle_mm_fault+0xbc0/0x1820
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685793]
>
> [<ffffffff810edc00>] ? __hrtimer_init+0x90/0x90
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685822]
>
> [<ffffffff810c211d>] ? remove_wait_queue+0x4d/0x60
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685853]
>
> [<ffffffff8121e20a>] ? poll_freewait+0x4a/0xa0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685882]
>
> [<ffffffff8106a537>] __do_page_fault+0x197/0x400
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685910]
>
> [<ffffffff8106a7c2>] do_page_fault+0x22/0x30
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685939]
>
> [<ffffffff8180a878>] page_fault+0x28/0x30
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685967]
>
> [<ffffffff813e4c5f>] ? copy_page_to_iter_iovec+0x5f/0x300
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.685997]
>
> [<ffffffff810b2795>] ? select_task_rq_fair+0x625/0x700
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686026]
>
> [<ffffffff813e4f16>] copy_page_to_iter+0x16/0xa0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686056]
>
> [<ffffffff816f02ad>] skb_copy_datagram_iter+0x14d/0x280
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686087]
>
> [<ffffffff8174a503>] tcp_recvmsg+0x613/0xbe0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686117]
>
> [<ffffffff8177844e>] inet_recvmsg+0x7e/0xb0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686146]
>
> [<ffffffff816e0d3b>] sock_recvmsg+0x3b/0x50
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686173]
>
> [<ffffffff816e0f91>] SYSC_recvfrom+0xe1/0x160
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686202]
>
> [<ffffffff810f36f5>] ? ktime_get_ts64+0x45/0xf0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686230]
>
> [<ffffffff816e239e>] SyS_recvfrom+0xe/0x10
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686259]
>
> [<ffffffff818086f2>] entry_SYSCALL_64_fastpath+0x16/0x71
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686287] Code: 55 b0 4c
>
> 89 f7 e8 53 cd ff ff 48 8b 55 b0 49 8b 4e 78 48 8b 82 d8 01 00 00 48
>
> 83 c1 01 31 d2 49 0f af 86 b0 00 00 00 4c 8b 73 78 <48> f7 f1 48 8b 4b
>
> 20 49 89 c0 48 29 c1 48 8b 45 d0 4c 03 43 48
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686512] RIP
>
> [<ffffffff810b416e>] task_numa_find_cpu+0x22e/0x6f0
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686544]  RSP
> <ffff880f79fbb818>
>
> Jun 28 09:46:41 roc04r-sca090 kernel: [137912.686896] ---[ end trace
>
> 544cb9f68cb55c93 ]---
>
> Jun 28 09:52:15 roc04r-sca090 kernel: [138246.669713] mpt2sas_cm0:
>
> log_info(0x30030101): originator(IOP), code(0x03), sub_code(0x0101)
>
> Jun 28 09:55:01 roc0
>
> _______________________________________________
>
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>
> ceph-users@lists.ceph.com
>
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
>
>
> Tim.
>
> --
> Tim Bishop
> http://www.bishnet.net/tim/
> PGP Key: 0x6C226B37FDF38D55
>
> _______________________________________________
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