Maintaining user-space ABI compatibility is one of the key guiding principles of Linux kernel development; changes that break user space are likely to be reverted quickly, often after an incendiary message from Linus. But what is to be done in cases where an ABI is deemed to be unworkable and unmaintainable? Control group maintainer Tejun Heo is trying to solve that problem, but, in the process, he is running into opposition from one of Linux’s highest-profile users. <p> Click below (subscribers only) for the full story.
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