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Message-Id: <3CA021B0-FEB8-4DAA-9CF2-224F305A8C8A@canonical.com>
Date: Mon, 24 Feb 2020 19:01:52 +0800
From: Kai-Heng Feng <kai.heng.feng@...onical.com>
To: "Brown, Aaron F" <aaron.f.brown@...el.com>
Cc: "davem@...emloft.net" <davem@...emloft.net>,
"mkubecek@...e.cz" <mkubecek@...e.cz>,
"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
"open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>,
"moderated list:INTEL ETHERNET DRIVERS"
<intel-wired-lan@...ts.osuosl.org>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [Intel-wired-lan] [PATCH v3 1/2] igb: Use device_lock() insead of
rtnl_lock()
> On Feb 22, 2020, at 08:30, Brown, Aaron F <aaron.f.brown@...el.com> wrote:
>
>
>
>> -----Original Message-----
>> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
>> Kai-Heng Feng
>> Sent: Friday, February 7, 2020 2:10 AM
>> To: davem@...emloft.net; mkubecek@...e.cz; Kirsher, Jeffrey T
>> <jeffrey.t.kirsher@...el.com>
>> Cc: open list:NETWORKING DRIVERS <netdev@...r.kernel.org>; Kai-Heng
>> Feng <kai.heng.feng@...onical.com>; moderated list:INTEL ETHERNET
>> DRIVERS <intel-wired-lan@...ts.osuosl.org>; open list <linux-
>> kernel@...r.kernel.org>
>> Subject: [Intel-wired-lan] [PATCH v3 1/2] igb: Use device_lock() insead of
>> rtnl_lock()
>>
>> Commit 9474933caf21 ("igb: close/suspend race in netif_device_detach")
>> fixed race condition between close and power management ops by using
>> rtnl_lock().
>>
>> However we can achieve the same by using device_lock() since all power
>> management ops are protected by device_lock().
>>
>> This fix is a preparation for next patch, to prevent a dead lock under
>> rtnl_lock() when calling runtime resume routine.
>>
>> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
>> ---
>> v3:
>> - Fix unreleased lock reported by 0-day test bot.
>> v2:
>> - No change.
>>
>> drivers/net/ethernet/intel/igb/igb_main.c | 14 ++++++++------
>> 1 file changed, 8 insertions(+), 6 deletions(-)
>
> This patch introduces the following call trace / RIP when I sleep / resume (via rtcwake) a system that has an igb port with link up: I'm not sure if it introduces the issue or just exposes / displays it as it only shows up on the first sleep / resume cycle and the systems I have that were stable for many sleep / resume cycles (arbitrarily 50+) continue to be so.
I can't reproduce the issue here.
> -------------------------------------------------------------------------------------------------
> ...
> [ 50.279436] usb usb3: root hub lost power or was reset
> [ 50.279437] usb usb4: root hub lost power or was reset
> [ 50.279491] sd 1:0:0:0: [sda] Starting disk
> [ 50.317691] ------------[ cut here ]------------
> [ 50.317692] RTNL: assertion failed at net/core/dev.c (2867)
> [ 50.317700] WARNING: CPU: 6 PID: 5287 at net/core/dev.c:2867 netif_set_real_num_tx_queues+0x184/0x1a0
> [ 50.317701] Modules linked in: rfcomm xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ipt_REJECT nf_rej
> ect_ipv4 nft_counter nft_compat nf_tables nfnetlink tun bridge stp llc cmac bnep iTCO_wdt intel_wmi_thunderbolt iT
> CO_vendor_support mxm_wmi wmi_bmof x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi kvm
> snd_hda_codec_realtek irqbypass snd_hda_codec_generic ledtrig_audio btusb btrtl btbcm snd_hda_intel btintel snd_i
> ntel_dspcfg snd_hda_codec bluetooth snd_hwdep snd_hda_core snd_seq crct10dif_pclmul crc32_pclmul joydev snd_seq_de
> vice ghash_clmulni_intel intel_cstate snd_pcm mei_me intel_uncore snd_timer ecdh_generic snd ecc pcspkr mei rfkill
> i2c_i801 soundcore intel_rapl_perf sg wmi acpi_pad intel_pmc_core nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_
> tables xfs libcrc32c sr_mod sd_mod cdrom t10_pi i915 intel_gtt drm_kms_helper syscopyarea sysfillrect sysimgblt fb
> _sys_fops cec drm igb ahci libahci e1000e libata crc32c_intel dca i2c_algo_bit video
> [ 50.317719] CPU: 6 PID: 5287 Comm: kworker/u24:17 Not tainted 5.6.0-rc2_next-queue_dev-queue_81b6341+ #5
> [ 50.317720] Hardware name: Gigabyte Technology Co., Ltd. Z370 AORUS Gaming 5/Z370 AORUS Gaming 5-CF, BIOS F6 04
> /03/2018
> [ 50.317722] Workqueue: events_unbound async_run_entry_fn
> [ 50.317723] RIP: 0010:netif_set_real_num_tx_queues+0x184/0x1a0
I added some debug message and made sure the ASSERT_RTNL() was reached. However rtnl is locked for me.
> [ 50.317724] Code: 43 1e e7 00 00 0f 85 fc fe ff ff ba 33 0b 00 00 48 c7 c6 92 57 9a bd 48 c7 c7 e0 a4 91 bd c6
> 05 23 1e e7 00 01 e8 57 3c 97 ff <0f> 0b e9 d6 fe ff ff 41 be ea ff ff ff e9 a4 fe ff ff 66 2e 0f 1f
> [ 50.317724] RSP: 0018:ffffb57fc1347d38 EFLAGS: 00010282
> [ 50.317725] RAX: 0000000000000000 RBX: ffff995a9e3e4000 RCX: 0000000000000007
> [ 50.317725] RDX: 0000000000000007 RSI: 0000000000000002 RDI: ffff995abe398f40
> [ 50.317725] RBP: 0000000000000004 R08: 0000000000000002 R09: 000000000002b500
> [ 50.317726] R10: 0000003a9dc62fa1 R11: 0000000000fed278 R12: 0000000000000004
> [ 50.317726] R13: 0000000000000004 R14: ffff995a9e3e4000 R15: ffff995a9e3e4000
> [ 50.317727] FS: 0000000000000000(0000) GS:ffff995abe380000(0000) knlGS:0000000000000000
> [ 50.317727] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 50.317727] CR2: 00007f4dbd7fae20 CR3: 0000000efbe0a004 CR4: 00000000003606e0
> [ 50.317728] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 50.317728] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [ 50.317728] Call Trace:
> [ 50.317734] __igb_open+0x1ee/0x5c0 [igb]
> [ 50.317737] igb_resume+0x193/0x1c0 [igb]
> [ 50.317739] ? pci_pm_thaw+0x80/0x80
So this is hibernation instead of suspension. I tried both S3 and S4 and can't reproduce the issue.
Kai-Heng
> [ 50.317741] dpm_run_callback+0x4f/0x140
> [ 50.317742] device_resume+0x107/0x180
> [ 50.317743] async_resume+0x19/0x50
> [ 50.317744] async_run_entry_fn+0x39/0x160
> [ 50.317746] process_one_work+0x1a7/0x370
> [ 50.317747] worker_thread+0x30/0x380
> [ 50.317748] ? process_one_work+0x370/0x370
> [ 50.317749] kthread+0x10c/0x130
> [ 50.317750] ? kthread_park+0x80/0x80
> [ 50.317751] ret_from_fork+0x35/0x40
> [ 50.317752] ---[ end trace 45a9ec6b02347b6e ]---
> [ 50.317753] ------------[ cut here ]------------
> [ 50.317753] RTNL: assertion failed at net/core/dev.c (2913)
> [ 50.317756] WARNING: CPU: 6 PID: 5287 at net/core/dev.c:2913 netif_set_real_num_rx_queues+0x79/0x80
> [ 50.317757] Modules linked in: rfcomm xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ipt_REJECT nf_rej
> ect_ipv4 nft_counter nft_compat nf_tables nfnetlink tun bridge stp llc cmac bnep iTCO_wdt intel_wmi_thunderbolt iT
> CO_vendor_support mxm_wmi wmi_bmof x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi kvm
> snd_hda_codec_realtek irqbypass snd_hda_codec_generic ledtrig_audio btusb btrtl btbcm snd_hda_intel btintel snd_i
> ntel_dspcfg snd_hda_codec bluetooth snd_hwdep snd_hda_core snd_seq crct10dif_pclmul crc32_pclmul joydev snd_seq_de
> vice ghash_clmulni_intel intel_cstate snd_pcm mei_me intel_uncore snd_timer ecdh_generic snd ecc pcspkr mei rfkill
> i2c_i801 soundcore intel_rapl_perf sg wmi acpi_pad intel_pmc_core nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_
> tables xfs libcrc32c sr_mod sd_mod cdrom t10_pi i915 intel_gtt drm_kms_helper syscopyarea sysfillrect sysimgblt fb
> _sys_fops cec drm igb ahci libahci e1000e libata crc32c_intel dca i2c_algo_bit video
> [ 50.317766] CPU: 6 PID: 5287 Comm: kworker/u24:17 Tainted: G W 5.6.0-rc2_next-queue_dev-queue_81
> b6341+ #5
> [ 50.317766] Hardware name: Gigabyte Technology Co., Ltd. Z370 AORUS Gaming 5/Z370 AORUS Gaming 5-CF, BIOS F6 04
> /03/2018
> [ 50.317767] Workqueue: events_unbound async_run_entry_fn
> [ 50.317768] RIP: 0010:netif_set_real_num_rx_queues+0x79/0x80
> [ 50.317768] Code: ff c3 80 3d 89 6c e7 00 00 75 db ba 61 0b 00 00 48 c7 c6 92 57 9a bd 48 c7 c7 e0 a4 91 bd c6
> 05 6d 6c e7 00 01 e8 a2 8a 97 ff <0f> 0b eb b8 0f 1f 00 0f 1f 44 00 00 53 f0 48 0f ba af d8 00 00 00
> [ 50.317769] RSP: 0018:ffffb57fc1347d58 EFLAGS: 00010282
> [ 50.317769] RAX: 0000000000000000 RBX: ffff995a9e3e4000 RCX: 0000000000000007
> [ 50.317769] RDX: 0000000000000007 RSI: 0000000000000002 RDI: ffff995abe398f40
> [ 50.317770] RBP: 0000000000000004 R08: 0000000000000002 R09: 000000000002b500
> [ 50.317770] R10: 0000003a9dc92851 R11: 0000000000fec568 R12: 0000000000000000
> [ 50.317770] R13: 0000000000000001 R14: ffff995a9e3e4000 R15: ffff995a9e3e4000
> [ 50.317771] FS: 0000000000000000(0000) GS:ffff995abe380000(0000) knlGS:0000000000000000
> [ 50.317771] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 50.317771] CR2: 00007f4dbd7fae20 CR3: 0000000efbe0a004 CR4: 00000000003606e0
> [ 50.317772] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 50.317772] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [ 50.317772] Call Trace:
> [ 50.317775] __igb_open+0x208/0x5c0 [igb]
> [ 50.317777] igb_resume+0x193/0x1c0 [igb]
> [ 50.317777] ? pci_pm_thaw+0x80/0x80
> [ 50.317778] dpm_run_callback+0x4f/0x140
> [ 50.317779] device_resume+0x107/0x180
> [ 50.317780] async_resume+0x19/0x50
> [ 50.317781] async_run_entry_fn+0x39/0x160
> [ 50.317782] process_one_work+0x1a7/0x370
> [ 50.317783] worker_thread+0x30/0x380
> [ 50.317784] ? process_one_work+0x370/0x370
> [ 50.317785] kthread+0x10c/0x130
> [ 50.317785] ? kthread_park+0x80/0x80
> [ 50.317786] ret_from_fork+0x35/0x40
> [ 50.317787] ---[ end trace 45a9ec6b02347b6f ]---
> [ 50.560158] OOM killer enabled.
> [ 50.560158] Restarting tasks ... done.
> [ 50.560713] video LNXVIDEO:00: Restoring backlight state
> [ 50.560714] PM: suspend exit
> [ 50.601179] ata5: SATA link down (SStatus 4 SControl 300)
> [ 50.601201] ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> ...
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