Control: retitle -1 linux-image-rt-amd64: High network latency with r8169 driver Control: tag -1 moreinfo
On Sun, 2023-04-23 at 09:14 +1000, Rod Webster wrote: > Thanks. > That is really a disappointing response because: > 1. Hardware selected based on Debian 4.x kernels in Buster that operated > safely was broken by the 5.10 and above kernels in Bullseye and Bookworm > 2. You ask us to report a bug if the R8168-dkms package has to be used so > we did, now no interest is shown in actioning the report > 3. It does not address the excessive latency in the Debian RT kernel that > is not present in the upstream version at kernel.org > 4. It has taken a lot of work from a lot of Linuxcnc users to identify the > issues before this report could be made. > > The official ISO release of Linuxcnc is still based on Buster so not many > users ventured into the later kernels hence the delay in reporting. > Linuxcnc is packaged in Bookworm so the issue will be more prevalent moving > forward. > > I was told by a Debian developer involved in linuxcnc that if there were > issues affecting us, they would be fixed. I hope something comes of this. [...] I'm not dismissing this bug report, but I wanted to first make it clear that we cannot take any responsibility for safety-critical applications. As to the general issue of network latency: - What was the latest Debian packaged kernel version you used? - You've said that installing r8168-dkms resolves the issue. Am I correct in assuming that when you ran the Debian packaged kernel, the r8169 driver was used? - Have you tested on any other machines with different network hardware? - We don't make a lot of changes to the kernel source, but our build configuration will be different. Can you confirm exactly which upstream release you've tested, and provide the configuration (.config) file you used? Ben. -- Ben Hutchings It's easier to fight for one's principles than to live up to them.
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