From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: ** X-Spam-Status: No, score=2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04386C2BA19 for ; Wed, 22 Apr 2020 01:13:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8CA812072D for ; Wed, 22 Apr 2020 01:13:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="N244YJv5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8CA812072D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 38AA78E0005; Tue, 21 Apr 2020 21:13:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 33BB18E0003; Tue, 21 Apr 2020 21:13:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2042E8E0005; Tue, 21 Apr 2020 21:13:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0209.hostedemail.com [216.40.44.209]) by kanga.kvack.org (Postfix) with ESMTP id F358F8E0003 for ; Tue, 21 Apr 2020 21:13:12 -0400 (EDT) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id B7CED181AEF00 for ; Wed, 22 Apr 2020 01:13:12 +0000 (UTC) X-FDA: 76733717424.06.paint91_90656be0d5021 X-HE-Tag: paint91_90656be0d5021 X-Filterd-Recvd-Size: 22843 Received: from mail-il1-f196.google.com (mail-il1-f196.google.com [209.85.166.196]) by imf15.hostedemail.com (Postfix) with ESMTP for ; Wed, 22 Apr 2020 01:13:12 +0000 (UTC) Received: by mail-il1-f196.google.com with SMTP id q10so298557ile.0 for ; Tue, 21 Apr 2020 18:13:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=hFMCH8ip/sfG52FQW04zw9F3hESHuZoQOld+CswJcZ0=; b=N244YJv5Cx4ezvyYv6JEKyXScc6K0GzJGUDYRB313NDIrn1mGaDnO4a/JOXqaOP5mW 86JkCMGHxsp14TUnq4iS16a3V8NOPNj2ghlZ/IN0+TQjrzMbdN+Xc85pNx8QaDy6scz3 aqxq3jNtH6QFiWo4y9L56bn+EqjuTqvxd8pxhkY9oJTdQ89Byhwq9+VHhBz1iTcJqzma Rrum6EEBhO76KfaQ6PZc8zN07oPhFYOQnwMVS8KodFX+0JBkPXSO9rpZhjUD18fEWgIe QYZcZnGQ4ZSEtea1xlqmyBeTQdxa0bKrHPN1fdiuCmDhYqrp1TAUnjoON3xm6+JG60qv pZbA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=hFMCH8ip/sfG52FQW04zw9F3hESHuZoQOld+CswJcZ0=; b=efBqq6EjLfx0/6XJG9L/TS7p0GIaCzJS6QerR/kiU8c8euzqvaATc/DHYAzz+lptm4 rOH2Y9/QEbwYVerbSqKxuUQFfeTCK44B2Qbg3BD53VwugwL2hNqjG6yrE86+0gknBIFr LbCcKZ9VQ8+/J5w4ay0CbiqzpvTRDXiZFM5h+dxFU/8Kwxx1GpDwfedN6+DNRKVP6lht rNBuC6S32bX2pquCZe2I/dN3QgVlqeb4FPNRXRlXZyqX4GH+Z/QznSTTqU+IQaVoMCCY XOeCvaAeKjg1pZfFEUtjvwIbXmlcR2FiRuE6K0LGOFwKfd+N/ZaJ/cfYDMYiwTAF8LxW vwDA== X-Gm-Message-State: AGi0PuaFixJACJGTfV3FsG6o1u8n5NwvtTck+LYtZ3m8j3kY4UBM4Vnt 7GMvdUS8L0yVXZXjvWuYUABfFfj8cl6jt5jF7nI= X-Google-Smtp-Source: APiQypIw3yo6aGpr+opTDfw7ljUQhf4PbzOt0jIJAJdzBo736A4zzItdQctSwidNXDTHGDkwbkaXc5hlP+Noh6wrTFA= X-Received: by 2002:a92:3652:: with SMTP id d18mr22972854ilf.212.1587517991461; Tue, 21 Apr 2020 18:13:11 -0700 (PDT) MIME-Version: 1.0 References: <8cae4626-90db-ff4e-a42b-75c11900d22a@suse.cz> In-Reply-To: From: Raymond Jennings Date: Tue, 21 Apr 2020 18:12:35 -0700 Message-ID: Subject: Re: BUG in mm/zswap To: Vitaly Wool Cc: Vlastimil Babka , Linux-MM , Seth Jennings , Dan Streetman Content-Type: multipart/alternative; boundary="000000000000f4a9b905a3d6d5bb" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --000000000000f4a9b905a3d6d5bb Content-Type: text/plain; charset="UTF-8" On Tue, Apr 21, 2020 at 8:30 AM Vitaly Wool wrote: > On Tue, Apr 21, 2020, 5:19 PM Vlastimil Babka wrote: > >> On 4/20/20 1:15 PM, Raymond Jennings wrote: >> > I got a bug check and the guys in #kernelnewbies in oftc told me to >> email you >> > guys about it, not sure what to do about it >> >> +CC zswap maintainers >> > > Thanks Vlastimil, I might have a fix for this. I'm going to post a couple > of patches this week and I'll make sure you are all CC'd. > > ~Vitaly > >> >> > 2036206:Apr 20 03:22:51 metalhead kernel: [103376.518888] kernel BUG at >> > mm/zswap.c:1184! >> >> Hmm that's this: >> >> ret = crypto_comp_decompress(tfm, src, entry->length, dst, &dlen); >> put_cpu_ptr(entry->pool->tfm); >> kunmap_atomic(dst); >> zpool_unmap_handle(entry->pool->zpool, entry->handle); >> BUG_ON(ret); >> >> Looks like decompression failed? Are there any messages prior to the BUG >> that >> would indicate the failed decompression? >> > I don't know, my system went in the pooper after this happened and I got some segfaults later in userspace processes aftewards when I was shutting down for a reboot >From loaded modules it seems like z3fold and lz4_decompress could be in use >> here. What's the output of: >> grep . /sys/module/zswap/parameters/* > > I don't have this directly anymore, but I was enabling z3fold and I had some rather extreme memory usage going on. I had the pool size set at 90 percent of total memory which was a whopping 32G of ram. Possible guess is that there was an allocation failure. I think the compressor was lzo, and at any rate besides the z3fold and 90 percent things I left all other parameters at their genkernel defaults. This was a one time fluke and my apologies for not grabbing the parameters when it first happened. > And is this reproducible? Or happened just once? Is it a regression after >> kernel >> update? >> > I don't know, I'm running under Gentoo and using my distro's version of sys-kernel/gentoo-sources-5.6.5 IIRC. > > 2036207-Apr 20 03:22:51 metalhead kernel: [103376.518893] invalid >> opcode: 0000 >> > [#1] PREEMPT SMP PTI >> > 2036208-Apr 20 03:22:51 metalhead kernel: [103376.518895] CPU: 5 PID: >> 2008 Comm: >> > swapoff Not tainted 5.6.5-gentoo-x86_64 #1 >> > 2036209-Apr 20 03:22:51 metalhead kernel: [103376.518896] Hardware >> name: Dell >> > Inc. OptiPlex 7020/02YYK5, BIOS A15 02/02/2018 >> > 2036210-Apr 20 03:22:51 metalhead kernel: [103376.518900] RIP: >> > 0010:zswap_frontswap_load+0x238/0x250 >> > 2036211-Apr 20 03:22:51 metalhead kernel: [103376.518901] Code: 00 00 >> e8 bb 04 >> > e5 ff 65 8b 05 3c d3 dc 71 85 c0 0f 85 61 ff ff ff e8 3b 74 db ff e9 57 >> ff ff ff >> > e8 31 74 db ff e9 35 ff ff ff <0f> 0b e8 25 74 db ff e9 00 ff ff ff e8 >> 37 13 e2 >> > ff 0f 1f 80 00 00 >> > 2036212-Apr 20 03:22:51 metalhead kernel: [103376.518902] RSP: >> > 0018:ffffa7ed41f6fb20 EFLAGS: 00010282 >> > 2036213-Apr 20 03:22:51 metalhead kernel: [103376.518903] RAX: >> 0000000080000000 >> > RBX: 00000000ffffffea RCX: 0000000000000000 >> > 2036214-Apr 20 03:22:51 metalhead kernel: [103376.518904] RDX: >> 0000000000000001 >> > RSI: 0000000000000000 RDI: 00000000ffffffff >> > 2036215-Apr 20 03:22:51 metalhead kernel: [103376.518905] RBP: >> ffff8f37e9eab2a0 >> > R08: ffff8f3a308de780 R09: 0000000000000000 >> > 2036216-Apr 20 03:22:51 metalhead kernel: [103376.518905] R10: >> 0000000000000000 >> > R11: ffffa7ed41f6fb00 R12: ffff8f37bf4e4000 >> > 2036217-Apr 20 03:22:51 metalhead kernel: [103376.518906] R13: >> ffff8f3bf6908d28 >> > R14: ffff8f3bf6908d20 R15: ffff8f3bc7cc5ec8 >> > 2036218-Apr 20 03:22:51 metalhead kernel: [103376.518907] FS: >> > 00007fc9c4cf0780(0000) GS:ffff8f3cfda00000(0000) knlGS:0000000000000000 >> > 2036219-Apr 20 03:22:51 metalhead kernel: [103376.518908] CS: 0010 DS: >> 0000 ES: >> > 0000 CR0: 0000000080050033 >> > 2036220-Apr 20 03:22:51 metalhead kernel: [103376.518909] CR2: >> 00007f9e8a1d471c >> > CR3: 0000000300754005 CR4: 00000000001606e0 >> > 2036221-Apr 20 03:22:51 metalhead kernel: [103376.518909] Call Trace: >> > 2036222-Apr 20 03:22:51 metalhead kernel: [103376.518916] >> > __frontswap_load+0x9c/0xf0 >> > 2036223-Apr 20 03:22:51 metalhead kernel: [103376.518918] >> swap_readpage+0xfb/0x330 >> > 2036224-Apr 20 03:22:51 metalhead kernel: [103376.518920] >> > swap_cluster_readahead+0x1da/0x300 >> > 2036225-Apr 20 03:22:51 metalhead kernel: [103376.518922] ? >> 0xffffffff8e000000 >> > 2036226-Apr 20 03:22:51 metalhead kernel: [103376.518924] >> > swapin_readahead+0x2e4/0x4a0 >> > 2036227-Apr 20 03:22:51 metalhead kernel: [103376.518926] ? >> > put_swap_page+0x106/0x310 >> > 2036228-Apr 20 03:22:51 metalhead kernel: [103376.518928] >> > unuse_pte_range+0x167/0x760 >> > 2036229-Apr 20 03:22:51 metalhead kernel: [103376.518930] >> try_to_unuse+0x5a1/0x730 >> > 2036230-Apr 20 03:22:51 metalhead kernel: [103376.518932] >> > __do_sys_swapoff+0x1df/0x6d0 >> > 2036231-Apr 20 03:22:51 metalhead kernel: [103376.518935] ? >> > exit_to_usermode_loop+0x97/0xf0 >> > 2036232-Apr 20 03:22:51 metalhead kernel: [103376.518937] >> do_syscall_64+0x55/0x1b0 >> > 2036233-Apr 20 03:22:51 metalhead kernel: [103376.518942] >> > entry_SYSCALL_64_after_hwframe+0x44/0xa9 >> > 2036234-Apr 20 03:22:51 metalhead kernel: [103376.518944] RIP: >> 0033:0x7fc9c4e25657 >> > 2036235-Apr 20 03:22:51 metalhead kernel: [103376.518945] Code: 73 01 >> c3 48 8b >> > 0d 39 b8 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 >> 00 0f 1f >> > 44 00 00 b8 a8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 09 >> b8 0c 00 >> > f7 d8 64 89 01 48 >> > 2036236-Apr 20 03:22:51 metalhead kernel: [103376.518946] RSP: >> > 002b:00007ffc715f01e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a8 >> > 2036237-Apr 20 03:22:51 metalhead kernel: [103376.518947] RAX: >> ffffffffffffffda >> > RBX: 0000000000000000 RCX: 00007fc9c4e25657 >> > 2036238-Apr 20 03:22:51 metalhead kernel: [103376.518948] RDX: >> 0000000000000001 >> > RSI: 0000000000000003 RDI: 0000557e405007b0 >> > 2036239-Apr 20 03:22:51 metalhead kernel: [103376.518948] RBP: >> 00007ffc715f1442 >> > R08: 0000557e404fe580 R09: 0000000000000001 >> > 2036240-Apr 20 03:22:51 metalhead kernel: [103376.518949] R10: >> 00007fc9c50018e0 >> > R11: 0000000000000206 R12: 0000000000000000 >> > 2036241-Apr 20 03:22:51 metalhead kernel: [103376.518949] R13: >> 0000557e405007b0 >> > R14: 0000000000000000 R15: 0000000000000000 >> > 2036242-Apr 20 03:22:51 metalhead kernel: [103376.518951] Modules >> linked in: >> > z3fold bfq ipt_REJECT nf_reject_ipv4 xt_multiport iptable_filter >> ip_tables >> > af_packet snd_hda_codec_hdmi i915 i2c_algo_bit drm_kms_helper >> intel_rapl_msr >> > intel_rapl_common cec uvcvideo x86_pkg_temp_thermal intel_powerclamp >> > snd_hda_codec_generic drm dell_wmi ledtrig_audio videobuf2_vmalloc >> sparse_keymap >> > iTCO_wdt kvm_intel wmi_bmof videobuf2_memops dell_smbios >> dell_wmi_descriptor >> > iTCO_vendor_support snd_hda_intel snd_usb_audio >> drm_panel_orientation_quirks >> > dcdbas snd_usbmidi_lib snd_rawmidi mousedev videobuf2_v4l2 kvm >> videobuf2_common >> > videodev intel_gtt agpgart snd_seq_device irqbypass input_leds joydev >> > syscopyarea snd_intel_dspcfg sysfillrect sysimgblt fb_sys_fops >> binfmt_misc >> > crct10dif_pclmul i2c_i801 ghash_clmulni_intel snd_hda_codec i2c_core >> > intel_cstate video wmi snd_hwdep intel_uncore snd_hda_core snd_pcm >> e1000e >> > intel_rapl_perf snd_timer snd backlight evbug lpc_ich evdev pcspkr >> soundcore >> > mfd_core coretemp hwmon aesni_intel crypto_simd cryptd glue >> > 2036243-Apr 20 03:22:51 metalhead kernel: helper >> > 2036244-Apr 20 03:22:51 metalhead kernel: [103376.518983] algif_rng >> algif_aead >> > algif_hash algif_skcipher af_alg crc32c_intel crc32_pclmul crc32_generic >> > configfs overlay squashfs lz4_decompress loop btrfs xor ext4 mbcache >> jbd2 >> > raid6_pq libcrc32c dm_snapshot dm_mirror dm_region_hash >> dm_log_userspace dm_log >> > dm_bufio dm_mod firewire_core crc_itu_t hid_generic usbhid ohci_hcd >> usb_storage >> > hid xhci_plat_hcd xhci_pci xhci_hcd ehci_pci ehci_hcd usbcore usb_common >> > scsi_transport_fc sr_mod cdrom sg sd_mod t10_pi ahci libahci libata >> scsi_mod >> > 2036245-Apr 20 03:22:51 metalhead kernel: [103376.519004] ---[ end trace >> > 5959740853c6dbd4 ]--- >> >> --000000000000f4a9b905a3d6d5bb Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On Tue, Apr 21, 2020 at 8:30 AM Vitaly Wo= ol <vitaly.wool@konsulko.com= > wrote:
On Tue, Apr 21, 2020, 5:19 PM Vlast= imil Babka <vbabka@s= use.cz> wrote:
On 4/20/20 1:15 PM, Raymond Jennings wrote:
> I got a bug check and the guys in #kernelnewbies in oftc told me to em= ail you
> guys about it, not sure what to do about it

+CC zswap maintainers

Thanks Vlastimil, I might have a fix for this. I'm= going to post a couple of patches this week and I'll make sure you are= all CC'd.

~Vitaly

> 2036206:Apr 20 03:22:51 metalhead kernel: [103376.518888] kernel B= UG at
> mm/zswap.c:1184!

Hmm that's this:

ret =3D crypto_comp_decompress(tfm, src, entry->length, dst, &dlen);=
put_cpu_ptr(entry->pool->tfm);
kunmap_atomic(dst);
zpool_unmap_handle(entry->pool->zpool, entry->handle);
BUG_ON(ret);

Looks like decompression failed? Are there any messages prior to the BUG th= at
would indicate the failed decompression?
=

I don't know, my system went in the po= oper after this happened and I got some segfaults later in userspace proces= ses aftewards=C2=A0when I was shutting down for a reboot

>From loaded modules it seems like z3fold and lz4_decompress could be in use=
here. What's the output of:
grep . /sys/module/zswap/parameters/*

I don't have this directly anymore, but I was= enabling z3fold and I had some rather extreme memory usage going on.=C2=A0= I had the pool size set at 90 percent of total memory which was a whopping= 32G of ram.=C2=A0 Possible guess is that there was an allocation failure.= =C2=A0 I think the compressor was lzo, and at any rate besides the z3fold a= nd 90 percent things I left all other parameters at their genkernel default= s.

This was a one time fluke and my apologies for = not grabbing the parameters when it first happened.
=C2=A0
<= blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l= eft:1px solid rgb(204,204,204);padding-left:1ex">
And is this reproducible? Or happened just once? Is it a regres= sion after kernel
update?

= I don't know, I'm running under Gentoo and using my distro's ve= rsion of sys-kernel/gentoo-sources-5.6.5 IIRC.
=C2=A0
> 2036207-Apr 20 03:22:51 metalhead kernel: [103376.518893] invalid opco= de: 0000
> [#1] PREEMPT SMP PTI
> 2036208-Apr 20 03:22:51 metalhead kernel: [103376.518895] CPU: 5 PID: = 2008 Comm:
> swapoff Not tainted 5.6.5-gentoo-x86_64 #1
> 2036209-Apr 20 03:22:51 metalhead kernel: [103376.518896] Hardware nam= e: Dell
> Inc. OptiPlex 7020/02YYK5, BIOS A15 02/02/2018
> 2036210-Apr 20 03:22:51 metalhead kernel: [103376.518900] RIP:
> 0010:zswap_frontswap_load+0x238/0x250
> 2036211-Apr 20 03:22:51 metalhead kernel: [103376.518901] Code: 00 00 = e8 bb 04
> e5 ff 65 8b 05 3c d3 dc 71 85 c0 0f 85 61 ff ff ff e8 3b 74 db ff e9 5= 7 ff ff ff
> e8 31 74 db ff e9 35 ff ff ff <0f> 0b e8 25 74 db ff e9 00 ff ff= ff e8 37 13 e2
> ff 0f 1f 80 00 00
> 2036212-Apr 20 03:22:51 metalhead kernel: [103376.518902] RSP:
> 0018:ffffa7ed41f6fb20 EFLAGS: 00010282
> 2036213-Apr 20 03:22:51 metalhead kernel: [103376.518903] RAX: 0000000= 080000000
> RBX: 00000000ffffffea RCX: 0000000000000000
> 2036214-Apr 20 03:22:51 metalhead kernel: [103376.518904] RDX: 0000000= 000000001
> RSI: 0000000000000000 RDI: 00000000ffffffff
> 2036215-Apr 20 03:22:51 metalhead kernel: [103376.518905] RBP: ffff8f3= 7e9eab2a0
> R08: ffff8f3a308de780 R09: 0000000000000000
> 2036216-Apr 20 03:22:51 metalhead kernel: [103376.518905] R10: 0000000= 000000000
> R11: ffffa7ed41f6fb00 R12: ffff8f37bf4e4000
> 2036217-Apr 20 03:22:51 metalhead kernel: [103376.518906] R13: ffff8f3= bf6908d28
> R14: ffff8f3bf6908d20 R15: ffff8f3bc7cc5ec8
> 2036218-Apr 20 03:22:51 metalhead kernel: [103376.518907] FS:
> =C2=A000007fc9c4cf0780(0000) GS:ffff8f3cfda00000(0000) knlGS:000000000= 0000000
> 2036219-Apr 20 03:22:51 metalhead kernel: [103376.518908] CS: =C2=A000= 10 DS: 0000 ES:
> 0000 CR0: 0000000080050033
> 2036220-Apr 20 03:22:51 metalhead kernel: [103376.518909] CR2: 00007f9= e8a1d471c
> CR3: 0000000300754005 CR4: 00000000001606e0
> 2036221-Apr 20 03:22:51 metalhead kernel: [103376.518909] Call Trace:<= br> > 2036222-Apr 20 03:22:51 metalhead kernel: [103376.518916]
> =C2=A0__frontswap_load+0x9c/0xf0
> 2036223-Apr 20 03:22:51 metalhead kernel: [103376.518918] =C2=A0swap_r= eadpage+0xfb/0x330
> 2036224-Apr 20 03:22:51 metalhead kernel: [103376.518920]
> =C2=A0swap_cluster_readahead+0x1da/0x300
> 2036225-Apr 20 03:22:51 metalhead kernel: [103376.518922] =C2=A0? 0xff= ffffff8e000000
> 2036226-Apr 20 03:22:51 metalhead kernel: [103376.518924]
> =C2=A0swapin_readahead+0x2e4/0x4a0
> 2036227-Apr 20 03:22:51 metalhead kernel: [103376.518926] =C2=A0?
> put_swap_page+0x106/0x310
> 2036228-Apr 20 03:22:51 metalhead kernel: [103376.518928]
> =C2=A0unuse_pte_range+0x167/0x760
> 2036229-Apr 20 03:22:51 metalhead kernel: [103376.518930] =C2=A0try_to= _unuse+0x5a1/0x730
> 2036230-Apr 20 03:22:51 metalhead kernel: [103376.518932]
> =C2=A0__do_sys_swapoff+0x1df/0x6d0
> 2036231-Apr 20 03:22:51 metalhead kernel: [103376.518935] =C2=A0?
> exit_to_usermode_loop+0x97/0xf0
> 2036232-Apr 20 03:22:51 metalhead kernel: [103376.518937] =C2=A0do_sys= call_64+0x55/0x1b0
> 2036233-Apr 20 03:22:51 metalhead kernel: [103376.518942]
> =C2=A0entry_SYSCALL_64_after_hwframe+0x44/0xa9
> 2036234-Apr 20 03:22:51 metalhead kernel: [103376.518944] RIP: 0033:0x= 7fc9c4e25657
> 2036235-Apr 20 03:22:51 metalhead kernel: [103376.518945] Code: 73 01 = c3 48 8b
> 0d 39 b8 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 0= 0 00 0f 1f
> 44 00 00 b8 a8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b= 0d 09 b8 0c 00
> f7 d8 64 89 01 48
> 2036236-Apr 20 03:22:51 metalhead kernel: [103376.518946] RSP:
> 002b:00007ffc715f01e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a8
> 2036237-Apr 20 03:22:51 metalhead kernel: [103376.518947] RAX: fffffff= fffffffda
> RBX: 0000000000000000 RCX: 00007fc9c4e25657
> 2036238-Apr 20 03:22:51 metalhead kernel: [103376.518948] RDX: 0000000= 000000001
> RSI: 0000000000000003 RDI: 0000557e405007b0
> 2036239-Apr 20 03:22:51 metalhead kernel: [103376.518948] RBP: 00007ff= c715f1442
> R08: 0000557e404fe580 R09: 0000000000000001
> 2036240-Apr 20 03:22:51 metalhead kernel: [103376.518949] R10: 00007fc= 9c50018e0
> R11: 0000000000000206 R12: 0000000000000000
> 2036241-Apr 20 03:22:51 metalhead kernel: [103376.518949] R13: 0000557= e405007b0
> R14: 0000000000000000 R15: 0000000000000000
> 2036242-Apr 20 03:22:51 metalhead kernel: [103376.518951] Modules link= ed in:
> z3fold bfq ipt_REJECT nf_reject_ipv4 xt_multiport iptable_filter ip_ta= bles
> af_packet snd_hda_codec_hdmi i915 i2c_algo_bit drm_kms_helper intel_ra= pl_msr
> intel_rapl_common cec uvcvideo x86_pkg_temp_thermal intel_powerclamp > snd_hda_codec_generic drm dell_wmi ledtrig_audio videobuf2_vmalloc spa= rse_keymap
> iTCO_wdt kvm_intel wmi_bmof videobuf2_memops dell_smbios dell_wmi_desc= riptor
> iTCO_vendor_support snd_hda_intel snd_usb_audio drm_panel_orientation_= quirks
> dcdbas snd_usbmidi_lib snd_rawmidi mousedev videobuf2_v4l2 kvm videobu= f2_common
> videodev intel_gtt agpgart snd_seq_device irqbypass input_leds joydev<= br> > syscopyarea snd_intel_dspcfg sysfillrect sysimgblt fb_sys_fops binfmt_= misc
> crct10dif_pclmul i2c_i801 ghash_clmulni_intel snd_hda_codec i2c_core > intel_cstate video wmi snd_hwdep intel_uncore snd_hda_core snd_pcm e10= 00e
> intel_rapl_perf snd_timer snd backlight evbug lpc_ich evdev pcspkr sou= ndcore
> mfd_core coretemp hwmon aesni_intel crypto_simd cryptd glue
> 2036243-Apr 20 03:22:51 metalhead kernel: helper
> 2036244-Apr 20 03:22:51 metalhead kernel: [103376.518983] =C2=A0algif_= rng algif_aead
> algif_hash algif_skcipher af_alg crc32c_intel crc32_pclmul crc32_gener= ic
> configfs overlay squashfs lz4_decompress loop btrfs xor ext4 mbcache j= bd2
> raid6_pq libcrc32c dm_snapshot dm_mirror dm_region_hash dm_log_userspa= ce dm_log
> dm_bufio dm_mod firewire_core crc_itu_t hid_generic usbhid ohci_hcd us= b_storage
> hid xhci_plat_hcd xhci_pci xhci_hcd ehci_pci ehci_hcd usbcore usb_comm= on
> scsi_transport_fc sr_mod cdrom sg sd_mod t10_pi ahci libahci libata sc= si_mod
> 2036245-Apr 20 03:22:51 metalhead kernel: [103376.519004] ---[ end tra= ce
> 5959740853c6dbd4 ]---

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