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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3FE1EC433F5 for ; Sat, 9 Oct 2021 15:51:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A41BC60F8F for ; Sat, 9 Oct 2021 15:51:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A41BC60F8F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id A548F900002; Sat, 9 Oct 2021 11:51:11 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A04E36B0072; Sat, 9 Oct 2021 11:51:11 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8CBF4900002; Sat, 9 Oct 2021 11:51:11 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0036.hostedemail.com [216.40.44.36]) by kanga.kvack.org (Postfix) with ESMTP id 7C69A6B006C for ; Sat, 9 Oct 2021 11:51:11 -0400 (EDT) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 36DC032094 for ; Sat, 9 Oct 2021 15:51:11 +0000 (UTC) X-FDA: 78677337942.15.2EDACF6 Received: from mail-wr1-f45.google.com (mail-wr1-f45.google.com [209.85.221.45]) by imf12.hostedemail.com (Postfix) with ESMTP id E28CE1002193 for ; Sat, 9 Oct 2021 15:51:10 +0000 (UTC) Received: by mail-wr1-f45.google.com with SMTP id r7so39497444wrc.10 for ; Sat, 09 Oct 2021 08:51:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:from:date:message-id:subject:to:cc; bh=jvg0IvrIoru/GlzBB54dhNqh5JZ/SrKgzCPZaVTjBsg=; b=dcj1q7aTbSClqD9ul0njUPb2+pPGvwRP961H5mvBClOfcMbgaV8QzbAKdyO6HoJxR/ AL3/8xbpsopo88xLtXJJVyRK3S9/4IAumXeQxduWem6aYACdWStxmYBTx7KEWPPDTKnk OfDmCuj1SWuczpZeZbsy7FtJTM32VbzqGe+AJcK5CAbq0T92UE5h6+rBf7501SvH7Sqf 3I2gEWs91q6nTyuwC8l5F9WEUiXYiL/nv0omNbCWv/Yfc8uDv4dqaz4ABkoi9V4KiXQu JwacdmbakOJhw+AEfjLxP6QSaDyBcW9wAPJ9nMN5fXSzRDvNNvZhmloQYcj+acGNkyG7 MjlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=jvg0IvrIoru/GlzBB54dhNqh5JZ/SrKgzCPZaVTjBsg=; b=2c82aMSLiGYRsS1/xBiUj9r5VxaNWTMNOEnyQThpZt38UDkZe3DEKyrOdSLrTlmvr+ BSgGu86rGoZN0QXk4qEX8lwEUifMvaJJGwhQprdEbHWDwaX59C4GvMMCGuEtXNzLw6gJ sjtPznSajg8bkImrUj7Ub7jfRg3X8wae09jIHvm3u8ADY/0oBJ4GWq7ztiJungHUcHKN nUuqLGAXLqMQzk0IoAEkSjz+kinofIqJOt4UF1MgzlyX2HTjVMDAeNaZtGuzvk49pc8U GMDguPk07uhuyopx4ZBWCAqvieAbpf9TTIJviNWxMokPnxh6KXD/Gpjje/Yoz8sLWYQr Uv/A== X-Gm-Message-State: AOAM5317ln6QeBH24q/rsKjyEXWXik/wDmgRY0RiLVk6S9syjOfTRqwU zFsakfTNX4VmlOVChhZwMvvBcZ0m/STXUNdTnJ4= X-Google-Smtp-Source: ABdhPJwqp3s7i+9bE5HwIRjl9PQY8BIMghs5OWQ9ShFxf76m29PIYqVHtEyLVxSHcW2kxH33hV61RrqVZwda4S72V6E= X-Received: by 2002:a05:600c:511c:: with SMTP id o28mr10492963wms.81.1633794669363; Sat, 09 Oct 2021 08:51:09 -0700 (PDT) MIME-Version: 1.0 From: Francesco Cepparo Date: Sat, 9 Oct 2021 17:50:53 +0200 Message-ID: Subject: Kernel BUG at mm/zswap.c:1313! To: Seth Jennings , Dan Streetman , Vitaly Wool Cc: linux-mm@kvack.org Content-Type: multipart/alternative; boundary="000000000000e745b705cded7613" X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: E28CE1002193 X-Stat-Signature: km8rxmik3s8e8opfw5o9syg4qnehorq1 Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=dcj1q7aT; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf12.hostedemail.com: domain of francesco.cepparo@gmail.com designates 209.85.221.45 as permitted sender) smtp.mailfrom=francesco.cepparo@gmail.com X-HE-Tag: 1633794670-277898 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: --000000000000e745b705cded7613 Content-Type: text/plain; charset="UTF-8" Dear mm/zswap.c maintainers, yesterday I hit a kernel BUG at mm/zswap.c:1313! which first happened to me several months ago (May 28, 2021). I'm using Arch Linux with kernel 5.14.9-arch2-1. The bug first appeared to me with the zen kernel, version 5.12.7-zen1-1-zen at at mm/zswap.c:1316 I found something was wrong with the system because my shell was hanging when calling $ keychain --eval id_rsa Otherwise the system worked fine, except for a Chrome gmail tab that hanged as well. When hitting the bug the first two times, I was using a VM. The first time, after shutting down the VM, the whole system soon crashed. But my music was still playing and I was able to reboot the system with the magic SysRQ keys. The second time though, after closing the VM, nothing happened, and the command $ keychain --eval id_rsa started working again. The third and fourth time I had no VMs running but there was a lot of used RAM and swap: total used free shared buff/cache available Mem: 15788 11898 572 1811 3318 1751 Swap: 15788 13001 2787 All the Swap is actually zram. This is my /etc/systemd/swap.conf: zram_enabled=1 zram_size=$(( RAM_SIZE / 1 )) zram_count=${NCPU} zram_streams=${NCPU} zram_alg=zstd zram_prio=32767 Here is the "cut here" section of dmesg for the last bug occurrence: [30959.209684] ------------[ cut here ]------------ [30959.209688] kernel BUG at mm/zswap.c:1313! [30959.209695] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [30959.209698] CPU: 1 PID: 47446 Comm: ThreadPoolForeg Tainted: P OE 5.14.9-arch2-1 #1 3d250f0857a0255dbbcb433ce1895c81c4740764 [30959.209701] Hardware name: Dell Inc. Vostro 5490/0J7GHT, BIOS 1.11.0 08/13/2020 [30959.209702] RIP: 0010:zswap_frontswap_load+0x344/0x360 [30959.209707] Code: ff ff e8 d6 fd d4 ff 45 31 e4 e9 4a ff ff ff 48 8d 7b 10 e8 be 2e 81 00 c7 43 10 00 00 00 00 44 8b 63 30 e9 04 ff ff ff 0f 0b <0f> 0b 41 bc f4 ff ff ff e9 22 ff ff ff e8 0a 74 80 00 66 2e 0f 1f [30959.209709] RSP: 0018:ffffb4bda204fc48 EFLAGS: 00010282 [30959.209711] RAX: 0000000000000000 RBX: ffffd4bd7fc6fe38 RCX: 0000000000000000 [30959.209713] RDX: 0000000000000021 RSI: 0000000000000000 RDI: ffff8dac9ce3b010 [30959.209714] RBP: ffff8daa51c6bf18 R08: ffff8daa64fb7780 R09: 0000000000000000 [30959.209716] R10: 0000000000001000 R11: 0000000000000000 R12: 00000000ffffffea [30959.209717] R13: ffff8daa65806818 R14: fffff9348638bec0 R15: ffff8daa65806810 [30959.209719] FS: 00007fc5e3a3c640(0000) GS:ffff8dad9c640000(0000) knlGS:0000000000000000 [30959.209721] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [30959.209723] CR2: 00002737078d203c CR3: 000000020a976005 CR4: 00000000003706e0 [30959.209724] Call Trace: [30959.209728] __frontswap_load+0x76/0xc0 [30959.209731] swap_readpage+0x1a9/0x2b0 [30959.209735] do_swap_page+0x823/0x950 [30959.209738] ? ptep_set_access_flags+0x2f/0x40 [30959.209740] ? wp_page_reuse+0x61/0x70 [30959.209743] __handle_mm_fault+0xaf4/0x15c0 [30959.209746] handle_mm_fault+0xd5/0x2a0 [30959.209748] do_user_addr_fault+0x1de/0x690 [30959.209752] exc_page_fault+0x72/0x170 [30959.209755] ? asm_exc_page_fault+0x8/0x30 [30959.209757] asm_exc_page_fault+0x1e/0x30 [30959.209759] RIP: 0033:0x563a399ee1f6 [30959.209761] Code: 76 ff 48 39 f1 0f 96 c1 48 39 c6 0f 92 c0 84 c1 0f 85 b6 16 00 00 48 39 d6 75 0f e9 ac 16 00 00 31 c0 31 c9 eb be 31 d2 eb cd <8b> 06 49 03 45 38 45 84 ff 48 89 85 08 ff ff ff 0f 85 53 10 00 00 [30959.209763] RSP: 002b:00007fc5e3a39e20 EFLAGS: 00010206 [30959.209765] RAX: 000000be0c080001 RBX: 00000000000003e8 RCX: 000000be0c062100 [30959.209766] RDX: 0000000000000000 RSI: 000000be08e06478 RDI: 00007fc5e3a3aff8 [30959.209768] RBP: 00007fc5e3a3b080 R08: 000000aa0080c000 R09: 000000be08e18df0 [30959.209769] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000001c [30959.209770] R13: 000000aa0080c000 R14: 000000be08e06479 R15: 000000be0bc70300 [30959.209773] Modules linked in: ppp_deflate bsd_comp ppp_async ppp_generic slhc snd_seq_dummy snd_hrtimer snd_seq snd_seq_device rfcomm hid_logitech_hidpp hid_logitech_dj usbhid cmac algif_hash algif_skcipher af_alg xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp ip6table_mangle ip6table_nat ip6table_filter ip6_tables iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bnep bridge btusb btrtl btbcm stp btintel snd_ctl_led llc bluetooth ecdh_generic ecc crc16 uvcvideo snd_soc_skl_hda_dsp videobuf2_vmalloc snd_soc_intel_hda_dsp_common videobuf2_memops snd_soc_hdac_hdmi videobuf2_v4l2 videobuf2_common videodev mc snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_soc_dmic hid_sensor_custom snd_sof_pci_intel_cnl hid_sensor_hub snd_sof_intel_hda_common cros_ec_ishtp soundwire_intel cros_ec soundwire_generic_allocation joydev intel_ishtp_loader soundwire_cadence snd_sof_intel_hda mousedev snd_sof_pci zram [30959.209815] intel_ishtp_hid snd_sof_xtensa_dsp iTCO_wdt intel_tcc_cooling intel_pmc_bxt dell_laptop hid_multitouch x86_pkg_temp_thermal iTCO_vendor_support snd_sof mei_hdcp intel_powerclamp soundwire_bus dell_wmi intel_rapl_msr ledtrig_audio dell_wmi_sysman dell_smbios coretemp firmware_attributes_class dell_wmi_descriptor wmi_bmof intel_wmi_thunderbolt snd_soc_skl dcdbas snd_soc_hdac_hda dell_smm_hwmon snd_hda_ext_core kvm_intel snd_soc_sst_ipc snd_soc_sst_dsp qrtr snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core ns kvm nvidia_drm(POE) snd_compress irqbypass crct10dif_pclmul crc32_pclmul ac97_bus ghash_clmulni_intel snd_pcm_dmaengine aesni_intel crypto_simd cryptd rapl intel_cstate nvidia_modeset(POE) intel_uncore snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi iwlmvm snd_hda_codec pcspkr psmouse snd_hda_core intel_spi_pci mac80211 snd_hwdep intel_spi snd_pcm r8169 spi_nor libarc4 snd_timer nvidia(POE) iwlwifi i2c_i801 realtek mtd snd vfat mdio_devres i2c_smbus soundcore i915 fat [30959.209860] libphy cfg80211 mei_me mei intel_lpss_pci intel_lpss tpm_crb idma64 rfkill i2c_algo_bit ttm drm_kms_helper intel_ish_ipc intel_ishtp cec processor_thermal_device_pci_legacy processor_thermal_device processor_thermal_rfim intel_gtt ucsi_acpi processor_thermal_mbox intel_pch_thermal agpgart processor_thermal_rapl typec_ucsi intel_rapl_common syscopyarea intel_soc_dts_iosf typec sysfillrect i2c_hid_acpi sysimgblt fb_sys_fops roles mac_hid i2c_hid int3403_thermal int340x_thermal_zone tpm_tis tpm_tis_core soc_button_array video wmi tpm rng_core intel_hid sparse_keymap int3400_thermal acpi_thermal_rel acpi_pad acpi_tad vboxnetflt(OE) vboxnetadp(OE) vboxdrv(OE) sg drm crypto_user fuse bpf_preload ip_tables x_tables btrfs blake2b_generic serio_raw atkbd libcrc32c crc32c_generic libps2 xor raid6_pq i8042 xhci_pci crc32c_intel xhci_pci_renesas serio [30959.209907] ---[ end trace 8fdeaaff2135991a ]--- [30959.209908] RIP: 0010:zswap_frontswap_load+0x344/0x360 [30959.209911] Code: ff ff e8 d6 fd d4 ff 45 31 e4 e9 4a ff ff ff 48 8d 7b 10 e8 be 2e 81 00 c7 43 10 00 00 00 00 44 8b 63 30 e9 04 ff ff ff 0f 0b <0f> 0b 41 bc f4 ff ff ff e9 22 ff ff ff e8 0a 74 80 00 66 2e 0f 1f [30959.209913] RSP: 0018:ffffb4bda204fc48 EFLAGS: 00010282 [30959.209915] RAX: 0000000000000000 RBX: ffffd4bd7fc6fe38 RCX: 0000000000000000 [30959.209916] RDX: 0000000000000021 RSI: 0000000000000000 RDI: ffff8dac9ce3b010 [30959.209918] RBP: ffff8daa51c6bf18 R08: ffff8daa64fb7780 R09: 0000000000000000 [30959.209919] R10: 0000000000001000 R11: 0000000000000000 R12: 00000000ffffffea [30959.209921] R13: ffff8daa65806818 R14: fffff9348638bec0 R15: ffff8daa65806810 [30959.209922] FS: 00007fc5e3a3c640(0000) GS:ffff8dad9c640000(0000) knlGS:0000000000000000 [30959.209924] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [30959.209925] CR2: 00002737078d203c CR3: 000000020a976005 CR4: 00000000003706e0 Thank you for your attention. --000000000000e745b705cded7613 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear mm/zswap.c maintainers,
yesterday I hit a kernel B= UG at mm/zswap.c:1313! which first happened to me several months ago (May 2= 8, 2021).

I'm using Arch Linux with kernel 5.14.9-arch2-1. The b= ug first appeared to me with the zen kernel, version 5.12.7-zen1-1-zen at a= t mm/zswap.c:1316

I found something was wrong with the system becaus= e my shell was hanging when calling $ keychain --eval id_rsa
Otherwise t= he system worked fine, except for a Chrome gmail tab that hanged as well.
When hitting the bug the first two times, I was using a VM. The first= time, after shutting down the VM, the whole system soon crashed. But my mu= sic was still playing and I was able to reboot the system with the magic Sy= sRQ keys.

The second time though, after closing the VM, nothing happ= ened, and the command
$ keychain --eval id_rsa
started working again.=

The third and fourth time I had no VMs running but there was a lot = of used RAM and swap:
=C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0total =C2=A0 =C2=A0 =C2=A0 =C2=A0used =C2=A0= =C2=A0 =C2=A0 =C2=A0free =C2=A0 =C2=A0 =C2=A0shared =C2=A0buff/cache =C2= =A0 available
Mem: =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 15788 =C2=A0 =C2= =A0 =C2=A0 11898 =C2=A0 =C2=A0 =C2=A0 =C2=A0 572 =C2=A0 =C2=A0 =C2=A0 =C2= =A01811 =C2=A0 =C2=A0 =C2=A0 =C2=A03318 =C2=A0 =C2=A0 =C2=A0 =C2=A01751
= Swap: =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A015788 =C2=A0 =C2=A0 =C2=A0 13001 = =C2=A0 =C2=A0 =C2=A0 =C2=A02787

All the Swap is actually zram= . This is my /etc/systemd/swap.conf:
zram_enabled=3D1
zram_size=3D$((= RAM_SIZE / 1 ))
zram_count=3D${NCPU}
zram_streams=3D${NCPU}
zram_= alg=3Dzstd
zram_prio=3D32767

Here is the "cut here" sec= tion of dmesg for the last bug occurrence:

[30959.209684] ----------= --[ cut here ]------------
[30959.209688] kernel BUG at mm/zswap.c:1313!=
[30959.209695] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[30959.20= 9698] CPU: 1 PID: 47446 Comm: ThreadPoolForeg Tainted: P =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 OE =C2=A0 =C2=A0 5.14.9-arch2-1 #1 3d250f0857a0255dbbcb43= 3ce1895c81c4740764
[30959.209701] Hardware name: Dell Inc. Vostro 5490/0= J7GHT, BIOS 1.11.0 08/13/2020
[30959.209702] RIP: 0010:zswap_frontswap_l= oad+0x344/0x360
[30959.209707] Code: ff ff e8 d6 fd d4 ff 45 31 e4 e9 4a= ff ff ff 48 8d 7b 10 e8 be 2e 81 00 c7 43 10 00 00 00 00 44 8b 63 30 e9 04= ff ff ff 0f 0b <0f> 0b 41 bc f4 ff ff ff e9 22 ff ff ff e8 0a 74 80 = 00 66 2e 0f 1f
[30959.209709] RSP: 0018:ffffb4bda204fc48 EFLAGS: 0001028= 2
[30959.209711] RAX: 0000000000000000 RBX: ffffd4bd7fc6fe38 RCX: 000000= 0000000000
[30959.209713] RDX: 0000000000000021 RSI: 0000000000000000 RD= I: ffff8dac9ce3b010
[30959.209714] RBP: ffff8daa51c6bf18 R08: ffff8daa64= fb7780 R09: 0000000000000000
[30959.209716] R10: 0000000000001000 R11: 0= 000000000000000 R12: 00000000ffffffea
[30959.209717] R13: ffff8daa658068= 18 R14: fffff9348638bec0 R15: ffff8daa65806810
[30959.209719] FS: =C2=A0= 00007fc5e3a3c640(0000) GS:ffff8dad9c640000(0000) knlGS:0000000000000000
= [30959.209721] CS: =C2=A00010 DS: 0000 ES: 0000 CR0: 0000000080050033
[3= 0959.209723] CR2: 00002737078d203c CR3: 000000020a976005 CR4: 0000000000370= 6e0
[30959.209724] Call Trace:
[30959.209728] =C2=A0__frontswap_load+= 0x76/0xc0
[30959.209731] =C2=A0swap_readpage+0x1a9/0x2b0
[30959.20973= 5] =C2=A0do_swap_page+0x823/0x950
[30959.209738] =C2=A0? ptep_set_access= _flags+0x2f/0x40
[30959.209740] =C2=A0? wp_page_reuse+0x61/0x70
[3095= 9.209743] =C2=A0__handle_mm_fault+0xaf4/0x15c0
[30959.209746] =C2=A0hand= le_mm_fault+0xd5/0x2a0
[30959.209748] =C2=A0do_user_addr_fault+0x1de/0x6= 90
[30959.209752] =C2=A0exc_page_fault+0x72/0x170
[30959.209755] =C2= =A0? asm_exc_page_fault+0x8/0x30
[30959.209757] =C2=A0asm_exc_page_fault= +0x1e/0x30
[30959.209759] RIP: 0033:0x563a399ee1f6
[30959.209761] Cod= e: 76 ff 48 39 f1 0f 96 c1 48 39 c6 0f 92 c0 84 c1 0f 85 b6 16 00 00 48 39 = d6 75 0f e9 ac 16 00 00 31 c0 31 c9 eb be 31 d2 eb cd <8b> 06 49 03 4= 5 38 45 84 ff 48 89 85 08 ff ff ff 0f 85 53 10 00 00
[30959.209763] RSP:= 002b:00007fc5e3a39e20 EFLAGS: 00010206
[30959.209765] RAX: 000000be0c08= 0001 RBX: 00000000000003e8 RCX: 000000be0c062100
[30959.209766] RDX: 000= 0000000000000 RSI: 000000be08e06478 RDI: 00007fc5e3a3aff8
[30959.209768]= RBP: 00007fc5e3a3b080 R08: 000000aa0080c000 R09: 000000be08e18df0
[3095= 9.209769] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000001c=
[30959.209770] R13: 000000aa0080c000 R14: 000000be08e06479 R15: 000000b= e0bc70300
[30959.209773] Modules linked in: ppp_deflate bsd_comp ppp_asy= nc ppp_generic slhc snd_seq_dummy snd_hrtimer snd_seq snd_seq_device rfcomm= hid_logitech_hidpp hid_logitech_dj usbhid cmac algif_hash algif_skcipher a= f_alg xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_t= cpudp ip6table_mangle ip6table_nat ip6table_filter ip6_tables iptable_mangl= e iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_fil= ter bnep bridge btusb btrtl btbcm stp btintel snd_ctl_led llc bluetooth ecd= h_generic ecc crc16 uvcvideo snd_soc_skl_hda_dsp videobuf2_vmalloc snd_soc_= intel_hda_dsp_common videobuf2_memops snd_soc_hdac_hdmi videobuf2_v4l2 vide= obuf2_common videodev mc snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_c= odec_generic snd_soc_dmic hid_sensor_custom snd_sof_pci_intel_cnl hid_senso= r_hub snd_sof_intel_hda_common cros_ec_ishtp soundwire_intel cros_ec soundw= ire_generic_allocation joydev intel_ishtp_loader soundwire_cadence snd_sof_= intel_hda mousedev snd_sof_pci zram
[30959.209815] =C2=A0intel_ishtp_hid= snd_sof_xtensa_dsp iTCO_wdt intel_tcc_cooling intel_pmc_bxt dell_laptop hi= d_multitouch x86_pkg_temp_thermal iTCO_vendor_support snd_sof mei_hdcp inte= l_powerclamp soundwire_bus dell_wmi intel_rapl_msr ledtrig_audio dell_wmi_s= ysman dell_smbios coretemp firmware_attributes_class dell_wmi_descriptor wm= i_bmof intel_wmi_thunderbolt snd_soc_skl dcdbas snd_soc_hdac_hda dell_smm_h= wmon snd_hda_ext_core kvm_intel snd_soc_sst_ipc snd_soc_sst_dsp qrtr snd_so= c_acpi_intel_match snd_soc_acpi snd_soc_core ns kvm nvidia_drm(POE) snd_com= press irqbypass crct10dif_pclmul crc32_pclmul ac97_bus ghash_clmulni_intel = snd_pcm_dmaengine aesni_intel crypto_simd cryptd rapl intel_cstate nvidia_m= odeset(POE) intel_uncore snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi = iwlmvm snd_hda_codec pcspkr psmouse snd_hda_core intel_spi_pci mac80211 snd= _hwdep intel_spi snd_pcm r8169 spi_nor libarc4 snd_timer nvidia(POE) iwlwif= i i2c_i801 realtek mtd snd vfat mdio_devres i2c_smbus soundcore i915 fat[30959.209860] =C2=A0libphy cfg80211 mei_me mei intel_lpss_pci intel_lpss = tpm_crb idma64 rfkill i2c_algo_bit ttm drm_kms_helper intel_ish_ipc intel_i= shtp cec processor_thermal_device_pci_legacy processor_thermal_device proce= ssor_thermal_rfim intel_gtt ucsi_acpi processor_thermal_mbox intel_pch_ther= mal agpgart processor_thermal_rapl typec_ucsi intel_rapl_common syscopyarea= intel_soc_dts_iosf typec sysfillrect i2c_hid_acpi sysimgblt fb_sys_fops ro= les mac_hid i2c_hid int3403_thermal int340x_thermal_zone tpm_tis tpm_tis_co= re soc_button_array video wmi tpm rng_core intel_hid sparse_keymap int3400_= thermal acpi_thermal_rel acpi_pad acpi_tad vboxnetflt(OE) vboxnetadp(OE) vb= oxdrv(OE) sg drm crypto_user fuse bpf_preload ip_tables x_tables btrfs blak= e2b_generic serio_raw atkbd libcrc32c crc32c_generic libps2 xor raid6_pq i8= 042 xhci_pci crc32c_intel xhci_pci_renesas serio
[30959.209907] ---[ end= trace 8fdeaaff2135991a ]---
[30959.209908] RIP: 0010:zswap_frontswap_lo= ad+0x344/0x360
[30959.209911] Code: ff ff e8 d6 fd d4 ff 45 31 e4 e9 4a = ff ff ff 48 8d 7b 10 e8 be 2e 81 00 c7 43 10 00 00 00 00 44 8b 63 30 e9 04 = ff ff ff 0f 0b <0f> 0b 41 bc f4 ff ff ff e9 22 ff ff ff e8 0a 74 80 0= 0 66 2e 0f 1f
[30959.209913] RSP: 0018:ffffb4bda204fc48 EFLAGS: 00010282=
[30959.209915] RAX: 0000000000000000 RBX: ffffd4bd7fc6fe38 RCX: 0000000= 000000000
[30959.209916] RDX: 0000000000000021 RSI: 0000000000000000 RDI= : ffff8dac9ce3b010
[30959.209918] RBP: ffff8daa51c6bf18 R08: ffff8daa64f= b7780 R09: 0000000000000000
[30959.209919] R10: 0000000000001000 R11: 00= 00000000000000 R12: 00000000ffffffea
[30959.209921] R13: ffff8daa6580681= 8 R14: fffff9348638bec0 R15: ffff8daa65806810
[30959.209922] FS: =C2=A00= 0007fc5e3a3c640(0000) GS:ffff8dad9c640000(0000) knlGS:0000000000000000
[= 30959.209924] CS: =C2=A00010 DS: 0000 ES: 0000 CR0: 0000000080050033
[30= 959.209925] CR2: 00002737078d203c CR3: 000000020a976005 CR4: 00000000003706= e0

Thank you for=C2=A0your attention.
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