Hi,

I notice a regression report on Bugzilla [1]. Quoting from it:

6e98b09da931a00bf4e0477d0fa52748bf28fcce
OS slackware64-current fully upto date, on an AMD 990fx motherboard with a 
Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 09).
Linux-rt-devel-rc2-rt1 and linux-rt-devel-6.4-rc3-rt2 had same issue, previous linux-rt-devel-6.3.3-rt15 worked with no issue.

Hello I suspect this series of commits is causing the full system lock im having when using the r8169 driver with linux-rt-devel-6.4-rc3-rt2. With the driver enabled my system locks up with a few mins of booting and logging into desktop. I have to use power off button and reboot to older kernel. With the r8169 driver blacklisted the kernel works perfectly.
My syslog attachment shows the driver errors and after looking at commits I saw the above numbered as being the most likly cause.
A member of oftc linux-rt irc channel looked and gave the comment posted below.
"tell the driver maintainers they must not enable the irq in the napi poll function"
He said it looked like that could be causing the errors and then full system lockup.
please contact me if any further information is required.

My fix has been blacklist r8169 and use the r8168 driver from relatek with a patch to enable builfing with the 6.4 kernel.
Thank you for your time
SamW

See Bugzilla for the full thread and attached syslog.

Anyway, I'm adding it to regzbot:

#regzbot introduced: 6e98b09da931a0 https://bugzilla.kernel.org/show_bug.cgi?id=217519
#regzbot title: Networking pull for v6.4 causes full system lockup on RTL8111/8168/8411

Thanks.

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=217519

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