Torvalds patch improves Linux performance by 2.6%

Linus Torvalds has introduced a patch to the Linux kernel that enhances multithreaded performance by 2.6%. The patch, titled "x86/uaccess: Avoid barrier_nospec() in 64-bit copy_from_user()", is a security modification aimed at addressing vulnerabilities related to Meltdown and Spectre attacks, which have persisted since their discovery in 2018. This update is a revision of a previous submission by Red Hat developer Josh Poimboeuf, optimized by Torvalds for better performance. The new implementation avoids the barrier_nospec() API, which is designed to prevent speculative execution—a feature in modern CPUs that can lead to security risks. Instead, it employs pointer masking to handle invalid addresses more efficiently. While the patch improves performance, it also highlights the ongoing challenge of balancing security and speed in Linux, particularly for servers that require stringent security measures. Torvalds, known for his technical expertise, continues to play a crucial role in the development of the Linux kernel, demonstrating his ability to enhance performance while addressing security concerns.

- Linus Torvalds' new patch improves Linux performance by 2.6%.

- The patch addresses vulnerabilities related to Meltdown and Spectre attacks.

- It optimizes a previous code submission from Red Hat developer Josh Poimboeuf.

- The update balances the need for security with performance enhancements.

- Torvalds remains a key figure in Linux kernel development, leveraging his expertise.