On Wed, Jul 24, 2024 at 12:55:52PM +0800, WangYuli wrote:
Hi greg k-h,
As a commercial Linux distribution maintainer, we understand that even though upstream support for linux-4.19.y is ending, our users' reliance on this kernel version will not cease immediately.
Good luck to them, given that almost immediately after it goes out of support it will become insecure :(
They often lack the time or resources to promptly migrate all their devices to a newer kernel, due to considerations such as stability, operational costs, and other factors.
They have had 6 years to plan for this, how much time do they need?
Therefore, to provide a more graceful conclusion to the linux-4.19.y lifecycle, we propose backporting these performance optimizations to extend its useful life and ensure a smooth transition for commercial users by the way.
Performance optimizations for old kernels like this are not a good idea, please just have them move to a more modern, and actually supported, kernel instead if they wish to have performance improvements. Otherwise you are ensuring they will never move.
good luck!
greg k-h