I’ve reviewed the commits between v6.7.6 and v6.7.7 but haven’t found anything particularly suspicious. From my perspective, it would be reasonable to bisect the commits between these two versions to identify the problematic one, and then confirm any related fixes accordingly.
Please let me know if you have any other thoughts or if there's anything I can help with on this, @ecanepa. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2107347 Title: Severe Network Performance Regression with BCM57800/BCM57810 on Kernel 6.8.0-40 through 6.12.16 Status in linux package in Ubuntu: Confirmed Status in linux source package in Jammy: In Progress Bug description: Significant network performance degradation when using Broadcom BCM57800/BCM57810 (bnx2x) NICs with jumbo frames on Ubuntu Jammy with kernels starting from 6.8.0-38, with the issue becoming severe and rendering the system unusable from 6.8.0-40 onwards. There is a similar report here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2098961 However, the proposed fix in that report does not resolve the issue for BCM57800 using the bnx2x driver. Environment: OS: Ubuntu 22.04(Jammy Jellyfish) Current HWE Kernel: 6.8.0-57.59~22.04.1 NIC: Broadcom BCM57800 / BCM57810 Driver: bnx2x Observed Behavior: Noticeable network degradation begins in kernel 6.8.0-38 Becomes unusable in kernel 6.8.0-40 and beyond Still reproducible in latest HWE kernel 6.8.0-57 Lowering the MTU to 1500 increases performance Expected Behavior: Stable and performant network performance as seen in previous kernel versions Additional Notes: As mentioned in LP#2098961, the issue appears to be fixed in kernel 6.12.17[0]. Request that this fix be backported or that further investigation be made into kernel regressions affecting bnx2x on these NICs. [0] https://kernel.ubuntu.com/mainline/v6.12.17/ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2107347/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
