kernel: add support for threaded network backlog processing 这个功能在5.15上会kernel panic

[GreatMichaelLee]

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1.关于你要提交的问题

Q：是否搜索了issue (使用 "x" 选择)

• [ x ] 没有类似的issue

2. 详细叙述

(1) 具体问题

A：复现步骤： step1: 编译x86 5.15最新基线代码 step2: 在rc.local里加入echo 1 > /proc/sys/net/core/backlog_threaded 使系统启动时启用此功能，重启软路由 step3: 系统启动内核时终端反复输出Kernel panic的日志，系统崩溃 step4: 如取消在rc.local里加入 echo 1 > /proc/sys/net/core/backlog_threaded 去使能该功能，则系统重启后能正常运作。

(2) 路由器型号和固件版本

A：x86软路由: VMWARE 8.0.1 ESXI+ N5105 + I225 B3 4*2.5G kernel 5.15.110 + OpenWrt R23.5.1

(3) 详细日志

A：终端反复输出Kernel panic的日志，系统崩溃

Thu May 11 16:09:51 2023 kern.warn kernel: [ 28.981479] ------------[ cut here ]------------ Thu May 11 16:09:51 2023 kern.warn kernel: [ 28.984894] WARNING: CPU: 2 PID: 7977 at napi_threaded_poll+0xc8/0xd0 Thu May 11 16:09:51 2023 kern.warn kernel: [ 28.985805] Modules linked in: ksmbd pppoe ppp_async wireguard snd_usb_audio snd_hda_intel snd_hda_codec_via snd_hda_codec_realtek snd_hda_codec_hdmi s Thu May 11 16:09:51 2023 kern.warn kernel: [ 28.985870] poly1305_x86_64 pcnet32 nft_reject_ipv6 nft_reject_ipv4 nft_reject_inet nft_reject_bridge nft_reject nft_redir nft_quota nft_objref nft_nu Thu May 11 16:09:51 2023 kern.warn kernel: [ 28.998110] sch_tbf sch_ingress sch_htb sch_hfsc em_u32 cls_u32 cls_route cls_matchall cls_fw cls_flow cls_basic act_skbedit act_mirred act_gact confi Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.011677] rpcsec_gss_krb5 auth_rpcgss veth tun snd_rawmidi snd_seq_device snd_pcm_oss snd_mixer_oss snd_hwdep snd_compress snd_pcm snd_timer snd sou Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.048489] CPU: 2 PID: 7977 Comm: napi/backlog-3 Not tainted 5.15.110 #0 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.049950] Hardware name: VMware, Inc. VMware7,1/440BX Desktop Reference Platform, BIOS VMW71.00V.20829224.B64.2211211837 11/21/2022 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.055552] RIP: 0010:napi_threaded_poll+0xc8/0xd0 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.056901] Code: 00 00 48 8d 75 e7 48 89 df e8 34 fe ff ff be 00 02 00 00 48 c7 c7 e1 ba 72 81 e8 23 44 99 ff 80 7d e7 00 75 c9 e9 51 ff ff ff <0f> 0b Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.059972] RSP: 0000:ffffc9000730fee0 EFLAGS: 00010286 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.062217] RAX: 0000000000000000 RBX: ffff88807dda2c90 RCX: 0000000000000000 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.065518] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88807dd21b80 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.067054] RBP: ffffc9000730ff00 R08: 0000000000000800 R09: 0000000000000000 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.068521] R10: 0000000000000001 R11: 0000000000000000 R12: ffff888003a70000 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.069947] R13: 0000000000000001 R14: ffffc900072ffc90 R15: ffff88807dda2c90 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.071388] FS: 0000000000000000(0000) GS:ffff88807dd00000(0000) knlGS:0000000000000000 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.075454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.076836] CR2: 00007fe50e4b2000 CR3: 00000000109b2000 CR4: 0000000000350ee0 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.078339] Call Trace: Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.079632] Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.080860] ? __kthread_parkme+0x46/0x60 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.082282] kthread+0x125/0x150 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.086354] ? __napi_poll+0x120/0x120 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.087705] ? set_kthread_struct+0x40/0x40 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.088922] ret_from_fork+0x1f/0x30 Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.090117] Thu May 11 16:09:51 2023 kern.warn kernel: [ 29.091212] ---[ end trace 6abe307e2eccae15 ]---

[WYC-2020]

6.1不行是因为中断的方式被改过，6.1以下目测没什么问题，5.15我试过没有你这种情况，这玩意开启会有一堆backlog，你ps看就知道，反正我不喜欢没开哈哈

[GreatMichaelLee]

我这6.1跟5.15是同样的现象…

---原始邮件--- 发件人: @.> 发送时间: 2023年5月11日(周四) 晚上6:24 收件人: @.>; 抄送: "michael @.**@.>; 主题: Re: [coolsnowwolf/lede] kernel: add support for threaded network backlog processing 这个功能在5.15上会kernel panic (Issue #11198)

6.1不行是因为中断的方式被改过，6.1以下目测没什么问题，5.15我试过没有你这种情况，这玩意开启会有一堆backlog，你ps看就知道，反正我不喜欢没开哈哈

— Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: @.***>

[GreatMichaelLee]

6.1不行是因为中断的方式被改过，6.1以下目测没什么问题，5.15我试过没有你这种情况，这玩意开启会有一堆backlog，你ps看就知道，反正我不喜欢没开哈哈

5.15上测了，修复了，6.1上改了中断方式是NA了么？能不能也patch一下啊....想用6.1,感谢大佬们@aiamadeus @WYC-2020